Tektronix Video Tektronix Video PQA600C Manual

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PQA600C and PQASW Picture Quality Analyzer

ZZZ

User Manual

*P077113700*

077-1137-00

PQA600C and PQASW Picture Quality Analyzer

ZZZ

User Manual

tional copyright laws and international treaty provisions.

Tektronix pro

ducts are covered by U.S. and foreign patents, issued and pending. Information in this publication supersedes that in all

previously published material. Speciﬁcations and price change privileges reserved.

TEKTRONIX and TEK are registered trademarks of Tektronix, Inc.

Warranty

Tektronix warrants that this product will be free from defects in materials and workmanship for a period of one (1) year from the date of shipment. If any such product proves defective during this warranty period, Tektronix, at its option, either will repair the defective product without charge for parts and labor, or will provide a replacement in exchange for the defective product. Parts, modules and replacement products used by Tektronix for warranty work may be new or reconditioned to like new performance. All replaced parts, modules and products become the property of Tektronix.

In order to obtain service under this warranty, Customer must notify Tektronix of the defect before the expiration of the warranty period and make suitable arrangements for the performance of service. Customer shall be responsible for packaging and shipping the defective product to the service center designated by Tektronix, with shipping charges prepaid. Tektronix shall pay for the return of the product to Customer if the shipment is to a location within the country in which the Tektronix service center is located. Customer shall be responsible for paying all shipping charges, duties, taxes, and any other charges for products returned to any other locations.

This warranty shall not apply to any defect, failure or damage caused by improper use or improper or inadequate maintenance and care. Tektronix shall not be obligated to furnish service under this warranty a) to repair damage resulting from attempts by personnel other than Tektronix representatives to install, repair or service the product; b) to repair damage resulting from improper use or connection to incompatible equipment; c) to repair any damage or malfunction caused by the use of non-Tektronix supplies; or d) to service a product that has been modiﬁed or integrated with other products when the effect of such modiﬁcation or integration increases the time or difﬁculty of servicing the product.

THIS WARRANTY IS GIVEN BY TEKTRONIX WITH RESPECT TO THE PRODUCT IN LIEU OF ANY OTHER WARRANTIES, EXPRESS OR IMPLIED. TEKTRONIX AND ITS VENDORS DISCLAIM ANY IMPLIED WARRANTIES OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE. TEKTRONIX' RESPONSIBILITY TO REPAIR OR REPLACE DEFECTIVE PRODUCTS IS THE SOLE AND E XCLU S IVE REMEDY PROVIDED TO THE CUSTOMER FOR BREACH OF THIS WARRANTY. TEKTRONIX AND ITS VENDORS WILL NOT BE LIABLE FOR ANY INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES IRRESPECTIVE OF WHETHER TEKTRONIX OR THE VENDOR HAS ADVANCE NOTICE OF THE POSSIBILITY OF SUCH DAMAGES.

[W2 – 15AUG04]

Warranty

Tektronix warrants that the media on which this software product is furnished and the encoding of the programs on the media will be free from defects in materials and workmanship for a period of three (3) months from the date of shipment. If any such medium or encoding proves defective during the warranty period, Tektronix will provide a replacement in exchange for the defective medium. Except as to the media on which this software product is furnished, this software product is provided “as is” without warranty of any kind, either express or implied. Tektronix does not warrant that the functions contained in this software product will meet Customer's requirements or that the operation of the programs will be uninterrupted or error-free.

In order to obtain service under this warranty, Customer must notify Tektronix of the defect before the expiration of the warranty period. If Tektronix is unable to provide a replacement that is free from defects in materials and workmanship within a reasonable time thereafter, Customer may terminate the license for this software product and return this software product and any associated materials for credit or refund.

THIS WARRANTY IS GIVEN BY TEKTRONIX WITH RESPECT TO THE PRODUCT IN LIEU OF ANY OTHER WARRANTIES, EXPRESS OR IMPLIED. TEKTRONIX AND ITS VENDORS DISCLAIM ANY IMPLIED WARRANTIES OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE. TEKTRONIX' RESPONSIBILITY TO REPLACE DEFECTIVE MEDIA OR REFUND CUSTOMER'S PAYMENT IS THE SOLE AND EXCLUSIVE REMEDY PROVIDED TO THE CUSTOMER FOR BREACH OF THIS WARRANTY. TEKTRONIX AND ITS VENDORS WILL NOT BE LIABLE FOR ANY INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES IRRESPECTIVE OF WHETHER TEKTRONIX OR THE VENDO R HAS ADVANCE NOTICE OF THE POSSIBILITY OF SUCH DAMAGES.

[W9b – 15AUG04]

Table of Contents

Important safety information .......................................................................................................... iii

General safety summary......................................................................................................... iii

Service safety summary ......................................................................................................... v

Terms in this manual .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . . . . . . . . . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. ... .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . v

Symbols and terms on the product . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. ... .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . . v

Compliance information (PQA600C only) . . .. . .. . .. . .. .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . . . . . . . . . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. vi

EMC compliance ................................................................................................................. vi

Safety compliance............................................................................................................... vii

Environmental considerations ................................................................................................... ix

Preface................................................................................................................................. x

About this manual . .. . .. .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . . . . . . . . . . . . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. ... .. . .. . x

Product description. . .. . .. . .. . .. . .. . .. . . . . . . . . . .. . .. . .. . .. . .. . .. . .. . .. .. . .. . .. . .. . .. . .. . .. . .. . .. . .. .. . .. . .. . .. . .. . .. . .. . .. . . . . . . .. x

Product documentation .. . .. . . . . . . . . . . . . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. xii

Software upgrades .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. ... ... ... .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. xiii

Field upgrade options . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. ... ... ... .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . . xiii

Conventions used in this manual. . .. . .. . .. . . . . . . .. . .. . .. . .. . .. . .. .. . .. . .. . .. . .. . .. . .. . .. .. . .. . .. . .. . .. . .. . . . . . . .. . .. . .. . .. . .. . xiii

PQA600C installation.................................................................................................................. 1

PQA600C standard accessories . .. . .. . .. . .. . .. . .. ... .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. ... .. . . 1

PQA600C operating requirements . . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. ... ... .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . 2

How to install the PQA600C hardware . .. . .. . .. . .. . .. . .. . .. .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. .. . .. . .. . .. . .. . .. . .. . .. . .. . . . . . . .. 3

How to power on the PQ A600C . . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. 6

How to shut down the PQA600C ... . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. 6

How to remove power from the PQ A600C . . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. ... ... .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . . 6

Network installation .............................................................................................................. 7

How to install the AJA driver..................................................................................................... 7

PQASW installation.................................................................................................................... 8

PQASW standard accessories . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . . . . . . . . . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. ... 8

PQASW system requirements.. . .. ... .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . . . . . . . . . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. 8

How to install the PQASW software............................................................................................. 9

Operating basics...................................................................................................................... 16

00C hardware components . . .. . .. . ... ... ... ... ... . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . . 16

PQA6

How to start or exit the PQA software.......................................................................................... 18

Display elements and menus. . .. . .. ... .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. ... .. . .. . .. . .. . .. . .. . 19

How the PQA analyzer works ... . .. . .. . .. . .. . .. . .. . .. ... ... ... .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. 25

Making measurements ............................................................................................................... 26

The analysis process .. . .. .. . .. . .. . .. . .. . .. . . . . . . .. . .. . .. . .. . .. . .. .. . .. . .. . .. . .. . .. . .. . .. .. . .. . .. . .. . .. . .. . . . . . . .. . .. . .. . .. . .. . . 26

Template measurements (Option BAS and Option ADV only) ................................................................ 28

Overview of the measurement process ........................................................................................ 31

Creating new measurements (Option ADV only) .............................................................................. 32

Conﬁguration nodes. ... .. . .. . .. . .. . .. . .. . .. . .. . . . . . . .. . .. . .. . .. . .. . .. . .. . .. .. . .. . .. . .. . .. . .. . .. . .. . .. . .. .. . .. . .. . .. . .. . .. . .. . .. . 35

Changing conﬁguration node settings. .. . .. . .. . .. . .. . .. . .. . .. . .. . .. .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . . . . . . . . . . . . .. . . 39

Importing measures ............................................................................................................. 73

Table of Content

PQA600C and PQASW User Manual i

Table of Content

Capturing and generating video. . . . . . . . . . . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. ... .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . 171

Reference........................................................................................................................... 209

Index

Video ﬁ le formats supported for measurements .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. ... .. . .. . .. . .. . .. . .. . .. . .. 75

Howtotakeamea

Performing temporal synchronization and spatial alignment of sequences . . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . 84

Using the Region-of-Interest (ROI)........................................................................................... 103

Howtoreviewm

PSNR measurement .......................................................................................................... 125

DMOS measurement ......................................................................................................... 135

Attention we

Artifacts measurement with no reference (Option ADV only) ............................................................... 149

Automated measurements using XML scripting (Option ADV only) ........................................................ 154

DMOS measur

only) ...................................................................................................................... 163

Simultane

Supported video source ﬁle formats.......................................................................................... 171

Preinstalled video sequences .. . .. . .. . .. . .. . .. . .. . .. . .. .. . .. . .. . .. . .. . .. . .. . .. . .. . . . . . . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. .. . .. . .. . 174

Converti

Converting video formats ..................................................................................................... 176

How to capture video for analysis . .. . .. . .. . .. . .. . .. . .. . .. . .. . . . . . . . . . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. .. . .. . .. . .. . .. . .. . .. . .. . 179

How to gen

What is the Measure Map? ................................................................................................... 209

How to ad

XML scripting commands (Option ADV only) . . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . . 211

Frequently asked questions . .. . .. . .. . .. . .. . .. . .. . .. . . . . . . . . . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . 220

ous generation and capture . .. .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . . 171

ng video ﬁles......................................................................................................... 175

just the Measure Map display ..................................................................................... 210

surement (Option BAS and Option ADV only) ............................................................ 78

easurement results (Option BAS and Option ADV only).................................................. 109

ighted DMOS measurement (Option ADV only) ............................................................... 142

ement with SDI generation, capture, and auto temporal/spatial alignment (PQA600C with Option ADV

erate video output ................................................................................................ 190

ii PQA600C and PQASW User Manual

Important safet

y information

Important saf

This manual contains information and warnings that must be followed by the user for safe operation and to keep the product in a safe condition.

To safely perform service on this product, additional information is provided at the end of this section. (See page v, Service safety summary.)

ety information

General safety summary

Use the product only as speciﬁed. Review the following safety precautions to avoid injury and prevent damage to this product or any products connected to it. Carefully read all instructions. Retain these instructions for future reference.

Comply with local and national safety codes.

For correct and safe operation of the product, it is essential that you follow generally accepted safety procedures in addition to the safety precautions speciﬁed in this manual.

The product is designed to be used by trained personnel only.

Only qualiﬁed personnel who are aware of the hazards involved should remove the cover for repair, maintenance, or adjustment.

Before use, always check the product with a known source to be sure it is operating correctly.

This product is not intended for detection of hazardous voltages.

Use personal protective equipment to prevent shock and arc blast injury where hazardous live conductors are exposed.

While using this product, you may need to access other parts of a larger system. Read the safety s ections of the other component manuals for warnings and cautions related to operating the system.

When incorporating this equipment into a system, the safety of that system is the responsibility of the assembler of the system.

To avoid ﬁre or personal injury

Use proper power cord. Use only the power cord speciﬁed for this product and certiﬁed for the country of use.

Do not use the provided power cord for other products.

Ground the product. This product is grounded through the grounding conductor of the power cord. To avoid electric

shock, the grounding conductor must be connected to earth ground. Before making connections to the input or output terminals of the product, make sure that the product is properly grounded.

Do not disable the power cord grounding connection.

Power disconnect. The power cord disconnects the product from the power source. See instructions for the location.

Do not position the equipment so that it is difﬁcult to operate the power cord; it must remain accessible to the user at all times to allow for quick disconnection if needed.

Observe all terminal ratings. Do not apply a potential to any terminal, including the common terminal, that exceeds the

maximum rating of that terminal.

Do not operate without covers. Do not operate this product with covers or panels removed, or with the case open.

Hazardous voltage exposure is possible.

PQA600C and PQASW User Manual iii

Important safet

Avoid exposed circuitry. Do not touch exposed connections and components when power is present.

Do not operate with suspected failures. If you suspect that there is damage to this product, have it inspected by

qualiﬁed service personnel.

Disable the product if it is damaged. Do not use the product if it is damaged or operates incorrectly. If in doubt about safety of the product, turn it off and disconnect the power cord. Clearly mark the product to prevent its further operation.

Examine the exterior of the product before y ou use it. Look for cracks or missing pieces.

Use only speciﬁed replacement parts.

Do not operate in wet/damp conditions. Be aware that condensation may occur if a unit is moved from a cold to a

warm environment.

y information

Do not oper

Keep product surfaces clean and dry.

ate in an explosive atmosphere.

Remove the input signals before you clean the product.

Provide proper ventilation. Refer to the installation instructions in the manual for details on installing the product

so it has proper ventilation.

Slots and openings are provided for ventilation and should never be covered or otherwise obstructed. Do not push objects into any

of the openings.

Provide a safe working environment. Always place the product in a location convenient for viewing the display

and indicators.

Avoid improper or prolonged use of keyboards, pointers, and button pads. Improper or prolonged keyboard or pointer use may result in serious injury.

Be sure your work area meets applicable ergonomic standards. Consult with an ergonomics professional to avoid stress injuries.

WARNING. The product is heavy. To reduce the risk of personal injury or damage to the device get help when lifting or

carrying the product.

iv PQA600C and PQASW User Manual

Servicesafetysummary

The Service safety summary section contains additional information required to safely perform service on the product. Only qualiﬁed personnel should perform service procedures. Read this Service safety summary and the General safety summary before performing any service procedures.

To avoid electric shock. Do not touch exposed connections.

Do not service alone. Do not perform internal service or adjustments of this product unless another person capable of

rendering ﬁrst aid and resuscitation is present.

Disconnect power. To avoid electric shock, switch off the product power and disconnect the power cord from the mains

power before removing any covers or p

Use care when servicing with power on. Dangerous voltages or currents may exist in this product. Disconnect

power, remove battery (if applicable), and disconnect test leads before removing protective panels, soldering, or replacing components.

Verify safety after repair. Always recheck ground continuity and mains dielectric strength after performing a repair.

Terms in this manual

anels, or opening the case for servicing.

Important safet

y information

These terms may appear in this manual:

WARNING. Warning statements identify conditions or practices that could result in injury or loss of life.

CAUTION. Caution statements identify conditions or practices that could result in damage to this product or other property.

Symbols and terms on the product

These terms may appear on the product:

DANGER indicates an injury hazard immediately accessible as you read the marking.

WARNING indicates an injury hazard not immediately accessible as you read the marking.

CAUTION indicates a hazard to property including the product.

When this symbol is marked on the product, be sure to consult the manual to ﬁnd out the nature of the potential hazards and any actions which have to be taken to avoid them. (This symbol may also be used refer the user to ratings in the manual.)

The following symbol(s) m ay appear on the product:

PQA600C and PQASW User Manual v

Compliance info

rmation (PQA600C only)

Compliance in

This section lists the EMC (electromagnetic compliance), safety, and environmental standards with which the instrument complies.

EMC compliance

European Uni

Meets intent of Directive 2014/30/EU for Electromagnetic Compatibility. Compliance was demonstrated to the following speciﬁcations as listed in the Ofﬁcial Journal of the European Communities:

EN 61000-3-2. AC power line harmonic emissions

EN 61000-3-3. Voltage changes, voltage ﬂuctuations, and ﬂicker

EN 61326-1. EMC requirements for electrical equipment for measurement, control, and laboratory use.

CISPR 11. Radiated and conducted emissions, Group 1, Class A

IEC 61000-4-2. Electrostatic discharge immunity

IEC 61000-4-3. RF electromagnetic ﬁeld immunity

on Declaration of Conformity – EMC

formation (PQA600C only)

123

IEC 61000-4-4. Electrical fast transient / burst immunity

IEC 61000-4-5. Power line surge immunity

IEC 61000-4-6. RF conducted immunity

IEC 61000-4-11. Power line voltage ﬂuctuation immunity

European contact.

Tektronix UK, Ltd. Western Peninsula Western Road Bracknell, RG12 1RF United Kingdom

This product is intended for use in nonresidential areas only. Use in residential areas may cause electromagnetic interference.

Emissions which exceed the levels required by this standard may occur when this equipment is c onnected to a test object.

For compliance with the EMC standards listed here, high quality shielded interface cables should be used.

vi PQA600C and PQASW User Manual

Compliance info

rmation (PQA600C only)

Australia / New Zealand Declaration of Conformity – EMC

Complies with the EMC provision of the Radiocommunications Act per the following standard, in accordance with ACMA:

CISPR 11+A1. Radiated and Conducted Emissions, Group 1, Class A, in accordance with EN 61326.

Australia / Ne

Baker & McKen Level 27, AMP Centre 50 Bridge Street Sydney NSW 2

w Zealand contact.

000, Australia

Safety compliance

This section lists the safety standards with which the product complies and other safety compliance information.

EU declaration of conformity – low v oltage

Compliance was demonstrated to the following speciﬁcation as listed in the Ofﬁcial Journal of the European Union:

Low Voltage Directive 2006/95/EC.

EN 61010-1. Safety Requirements for Electrical Equipment for Measurement, Control, and Laboratory Use – Part 1: General Requirements.

U.S. na

tionally recognized testing laboratory listing

UL 61010-1. Safety Requirements for Electrical Equipment for Measurement, Control, and Laboratory Use – Part 1: General Requirements.

zie

Canadian certiﬁcation

CAN/CSA-C22.2 No. 61010-1. Safety Requirements for Electrical Equipment for Measurement, Control, and Laboratory Use – Part 1: General Requirements.

itional compliances

Add

IEC 61010-1. Safety Requirements for Electrical Equipment for Measurement, Control, and Laboratory Use – Part 1: General Requirements.

Equipment type

Test and measuring equipment.

Safety class

Class 1 – grounded product.

PQA600C and PQASW User Manual vii

Compliance info

Pollution degree descriptions

A measure of the contaminants that could occur in the environment around and within a product. Typically the internal environment inside a product is considered to be the same as the external. Products should be used only in the environment for which they are r ated.

Pollution degree 1. No pollution or only dry, nonconductive pollution occurs. Products in this category are generally encapsulated, hermetically sealed, or located in clean rooms.

Pollution degree 2. Normally only dry, nonconductive pollution occurs. Occasionally a temporary conductivity that is caused by condensation must be expected. This location is a typical ofﬁce/home environment. Temporary condensation occurs only when the product is out of service.

Pollution degree 3. Conductive pollution, or dry, nonconductive pollution that becomes conductive due to condensation. These are sheltered locations where neither temperature nor humidity is controlled. The a rea is protected from direct sunshine, rain, or direct wind.

Pollution degree 4. Pollution that generates persistent conductivity through conductive dust, rain, or snow. Typical outdoor locations.

Pollution degree rating

Pollution degree 2 (as deﬁned in IEC 61010-1). Rated for indoor, dry location use only.

rmation (PQA600C only)

IP rating

IP20 (as deﬁned in IE C 60529).

Measurement and overvoltage category descriptions

Measurement terminals on this product may be rated for measuring mains voltages from one or more of the following

ories (see speciﬁc ratings marked on the product and in the manual).

categ

ory II. Circuits directly connected to the building wiring at utilization points (socket outlets and similar points).

Categ

gory III. In the building wiring and distribution system.

Cate

gory IV. At the source of the electrical supply to the building.

Cate

NOTE. Only mains power supply circuits have an overvoltage category rating. Only measurement circuits have a

measurement category rating. Other circuits within the product do not have either rating.

Mains overvoltage category rating

Overvoltage category II (as deﬁned in IEC 61010-1).

viii PQA600C and PQASW User Manual

Environmental considerations

This section provides information about the environmental impact of the product.

Product end-of-life handling

Observe the following guidelines when recycling an instrument or component:

Equipment recycling. Production of this equipment required the extraction and use of natural resources. The equipment

may contain substances that could be harmful to the environment or human health if improperly handled at the product’s end of life. To avoid release of such substances into the environment and to reduce the use of natural resources, we encourage you to recycle this product in an appropriate system that will ensure that most of the m aterials are reused or recycled appropriately.

This symbol indicates that this product complies with the applicable European Union requirements according to Directives 2012/19/EU and 2006/66/EC on waste electrical and electronic equipment (WEEE) and batteries.

Perchlorate materials. This product contains one or more type CR lithium batteries. According to the state of

California, CR lithium batteries are classiﬁed as perchlorate materials and require special handling.

Compliance info

rmation (PQA600C only)

PQA600C and PQASW User Manual ix

Preface

About this manual

This manual describes the installation and basic operation of the PQA600C P icture Quality Analyzer and the PQASW Picture Quality Analysis Software.

Product description

The PQA600C analyzer and PQASW are the latest-generation Picture Quality Analysis products built on the Tektronix’ Emmy Award winn suite of repeatable, objective quality measurements that closely correspond with subjective human visual assessment.

PQA600C key features

ing PQA200/300 Picture Quality Analyzers. Based on concepts of the human vision system, the PQA provides a

Fast, accurate, repeatable, objective picture quality measurement (Option BAS)

Predicts DMOS (Differential Mean Opinion Score) measurement based on model of the Human Vision System model (Option BAS)

SD/HD/3G SDI, HDMI compliant with HDCP interface and IP interface supporting IGMP for Simultaneous Generation and Capture, 2-channel Capture and 2-channel Generation with Swap-channel / Side by Side / Wipe display

Real time Up / Down conversion at generation / capture with SDI/HDMI interface for testing the instrument with Up / Down conversion process

IP Interface with simultaneous 2–channel generation / capture with IGMP support for multicast streams (Option IP)

Picture quality measurements can be made on a variety of HD video formats (1080p, 1080i, 720p) and SD video formats (525i or 625i) (Option BAS)

User-conﬁgurable viewing condition and display models for reference and comparison (Option ADV)

Attention/Artifact weighted measurement (Option ADV)

Region Of Interest (ROI) on measurement execution and review (Option BAS)

Automatic temporal and spatial alignment (Option BAS)

Embedded Reference Decoder (Option BAS)

Easy regression testing and automation with XML scripting (Option ADV)

Multiple results view options (Option BAS)

Preinstalled sample reference and test sequences

x PQA600C and PQASW User Manual

PQASW key features

Fast, accurate, repeatable, and objective picture quality measurement

Predicts DMOS (Differential Mean Opinion Score) based on the Human Vision System model

Picture quality measurements can be made on a variety of HD video formats (1080p, 1080i, 720p) and SD Video Formats (525i or 625i)

User-conﬁgurable viewing condition and display models for reference and comparison (Option A DV)

Attention/Artifact weighted measurement (Option ADV)

Region Of Interest (ROI) on measurement execution and review

Automatic temporal and spatial alignment

Embedded reference decoder

Easy regression testing and automation using XML scripting (Option ADV) with "Export/Import" ﬁle from GUI

Multiple results view options

IP interface with simultaneous generation/capture and 2-Ch capture (Option IP)

Embedded sample reference and test sequences

Preface

Available for customer installation on the customer's own PC

PQA600C and PQASW User Manual xi

Preface

Product documentation

All of the following documents can be found on the Tektronix Web site

To read about Use this document (Tektronix part number)

Installation and safety information PQA600C and PQASW Installation and Safety Instructions (071-3439-XX).

Installation and safety information including in-depth operating information

Preconﬁgured measurements PQA600C and PQASW Measurements Reference (071-3440-XX).

PQA600C data security PQA600C Declassiﬁcation and Security Instructions (077-1141-XX).

Known issues with the product

PC platform information Refer to the PC platform documentation for information about the PC

This printed manual contains information about product safety and compliance and describes how to install the instrument.

PQA600C and PQASW User Manual (077-1137-XX).

This PDF manual contains information about product safety and compliance and describes how to install the instrument. Also included are basic instructions on how to start using the PQA analyzer and detailed information about operating the PQA, including how measurements are calculated and displayed.

This printed manual contains information about using the preconﬁgured measurements provided with the product.

This PDF manual contains the Dell Statement of Volatility for the Dell Precision Workstation 5810 XL, which provides information for securing data on the product.

PQA600C and PQASW Release Notes (077-1140-XX).

This PDF manual contains information about new features and known issues with the PQA software.

platform hardware and software.

xii PQA600C and PQASW User Manual

Software upgrades

Periodic software upgrades might become available.

Field upgrade options

After your PQA analyzer has been delivered, you can add the following ﬁeld upgrade options to the analyzer:

Table i: Field upgrade options

Option Description PQA600C PQASW

BAS

ADV

Adds the base measurement package

Adds the advanced measurement package (script operation, measure

Adds IP g

ment conﬁgurability, weighting m easurement)

eneration / capture

Preface

√ √√

√√

Conventions used in this manual

The following icons may appear throughout this manual.

Sequence step or index number

Front panel power

Connect power

Network

PS2 SVGA USB

PQA600C and PQASW User Manual xiii

Preface

xiv PQA600C and PQASW User Manual

PQA600C install

ation

PQA600C insta

This section contains information about installing your PQA600C instrument. See PQASW software installation for information about installing the PQASW product software. (See page 8.)

Unpack the instrument and check that you received all items listed below as standard accessories.

llation

PQA600C standard accessories

The followi

Table 1: PQA600C standard accessories

Accessory

PQA600C and PQASW Installation and Safety Instructions

PQA600C and PQASW Measurement Technical Reference

PQA600C and PQASW Application Install CD

PQA600 Video Sequences Recovery Disks

Product Information Sheet for the People’s Republic of China

Statement of Compliance

Reply Card

HDMI cable, Type A to Type C

Display port to DVI-D adapter cable 174-6345-XX

DVI-to-VGA adapter

USB optical mouse

USB keyboard

Software Key Dongle

Dell Operating System Reinstallation DVD (Windows 7 Professional SP1 64-Bit)

Dell Quick Start Guide

Dell Warranty, Safety, and Regulatory Information booklet

Power Cord

ng table lists the standard accessories that are shipped with the PQA600C analyzer.

North America (Option A0)

Universal Euro (Option A1)

United Kingdom (Option A2)

Australia (Option A3)

Switzerland (Option A5)

Japan (Option A6)

China (Option A10)

India (Option A11)

Brazil (Option A12)

No power cord or AC adapter (Option A99)

Tektronix part number

071-3439-XX

071-3440-XX

020-3159-XX

020-3053-XX

071-2181-XX

001-1180-XX

001-1424-XX

174-6308-XX

013-0347-XX

119-7054-XX

119-7275-XX ———

———

161-0066-00

161-0066-09

161-0066-10

161-0066-13

161-0154-00

161-0298-00

161-0304-00

161-0324-00

161-0357-00 ———

PQA600C and PQASW User Manual 1

PQA600C install

ation

PQA600C operating requirements

1. Place the instrument on a bench.

2. Before operating, ensure that the ambient temperature is between +50 °F and +95 °F (+10 °C to +35 °C).

CAUTION. To ensure proper cooling, keep the front and rear of the instrument clear of obstructions.

3. The performance requirements of the PQA600C are valid if the instrument is being operated within the power and environmental limits (See page 2, General characteristics.) and has had a minimum warm-up of 20 minutes.

General characteristics

Table 2: Power consumption

Characteristic Performance requirements Supplemental information

Power rating

AC Input Voltage Range 100 – 240 VAC

AC input frequency 50/60 Hz

Minimum E fﬁciency (Energy Star Qualiﬁed)

85% efﬁcient power supply

100V–240V(6A)

65%

Yes

WARNING. To reduce the risk of ﬁre and shock, verify that mains supply voltage ﬂuctuations do not exceed 10% of the

operating voltage range.

Table 3: Environmental characteristics

Characteristics Information Supplemental information

Temperature

Operating

Non-operating

Humidity

Operating and Non-operating

Shock

Operating

Non-operating

Vibration

Operating

Non-operating

+10°Cto+35°C(+50°Fto+95°F)

–40 °C to +65 °C (–40 °F to +149 °F)

20% to 80%, non-condensing

40 G ±5% with pulse duration of 2 ms ±10%

105 G ±5% with pulse duration of 2 ms ±10%

5 Hz to 350 Hz at 0.0002 G

5 Hz to 500 Hz at 0.001 G2/Hz

/Hz

2 PQA600C and PQASW User Manual

Table 3: Environmental characteristics (cont.)

Characteristics Information Supplemental information

Altitude

Operating

Non-operating

Airborne contaminant level

The data stream to and from the RAID disks may be interrupted at 60 Hz and above.

–15.2 m to 3,048 m (-50 ft to 10,000 ft)

–15.2 m to 10,668 m (-50 ft to 35,000 ft)

G1 as deﬁned by ISA-S71.04-1985

How to install the PQA600C hardware

This section provides basic information about installing the PQA600C analyzer.

CAUTION. To prevent personal injury from lifting a heavy object, always use two people to move the PQA600C analyzer.

PQA600C install

ation

Hardware prerequisites

Before installation, ensure that the following are available:

Mains power, 100 – 240 VAC (6A), 50/60 Hz. (See Table 4 on page 6.)

WARNING. To reduce the risk of ﬁre and shock, ensure that the m ains supply voltage ﬂuctuations do not exceed 10% of the

operating vo

Clearance around the unit to allow proper airﬂow.

CAUTION. To prevent overheating, leave a 10.2 cm (4 in) minimum clearance on all vented sides of the analyzer to

permit the airﬂow r

An RJ45 network connection between the Gigabit Ethernet port and your network.

An appropriate display monitor. The PQA600C analyzer is not supplied with a monitor, although it is conﬁgured with a high-performance video card. The monitor needs to be HDCP compliant in order to view unencrypted HDCP data.

ltage range.

equired for proper ventilation.

PQA600C and PQASW User Manual 3

PQA600C install

Installation procedure

To install the PQA600C analyzer, perform the following generalized procedure:

1. Make the following system connections to the analyzer (See Figure 1.):

a. Connect a display m onitor to either the DVI or Display port connector on the rear panel. For dual-monitor installations,

NOTE. In order to view unencrypted HDCP data, the monitor must be HDCP compliant and be connected directly to the

PQA600C analyzer. You cannot view the HDCP data from a remote desktop connection to the analyzer.

If you connect two monitors to the instrument using the DVI and Display port connectors, both monitors must be HDCP compliant in order to view HDCP data.

Use the Display port-to-DVI cable adapter (supplied as a standard accessory) to connect a second monitor. Use the DVI-to-VGA adapter supplied as a standard accessory if your monitor has only a VGA input connector.

b. Attach the USB keyboard and mouse to any of the four USB ports on the rear panel. If desired, you can attach the

c. If you are going to be operating the instrument on your local network, connect an Ethernet cable from a network

ation

you can use both of these ports at the same time. A Display port-to-DVI adapter cable is supplied as a standard accessory. The maximum resolution on the DVI and Display ports is 2560 × 1600.

keyboard and mouse using the USB-to-PS2 adapters to connect to the PS2 ports on the rear panel.

connection to one of the network adapter connectors on the rear panel. (See page 7, Network installation.)

gure 1: PQA600C system connections

4 PQA600C and PQASW User Manual

PQA600C install

2. If you will be capturing video to analyze or if you will be outputting video, make the following video signal connections

to the analyzer

(See Figure 2.):

ation

a. For SDI video s

b. For HDMI video

c. For IP video si

connectors.

ignals, connect 75 Ω BNC cables to the SDI Out / In connectors.

signals, connect the supplied HDMI-mini-to-HDMI adapter cable to the HDMI Out / In connectors.

gnals (Option IP only), connect an Ethernet cable to one of the two Ethernet network interface

Figure 2: PQA600C video signal connections

3. Insta

CAUTION. To operate the PQA software, the software key dongle must be installed on any USB port of the PQA600C

anal

4. Connect power to the PQA600C analyzer. (See page 6, How to power on the PQA600C.)

5. Press the power button on the front panel.

6. After the analyzer powers on, click the PQA600C account icon to access the instrument desktop. No password

PQA600C and PQASW User Manual 5

ll the software key dongle that was supplied with the product on any USB port of the PQA600C analyzer or

computer running the PQA software.

yzer or computer running the PQA software. Otherwise, the PQA software will run only in trial mode.

is required.

PQA600C install

ation

How to power on the PQA600C

The following table lists the operating voltage requirements for the PQA600C analyzer. All voltages are RMS values.

Table 4: Power supply requirements

Source voltage Frequency Maximum Rated Input Current

100 – 240 VAC 50/60 Hz

NOTE. Connect the power cord (provided with the unit) to the power connector on the rear panel. Then connect the

power cord plug to a properly grounded outlet.

To power on the instrument (after making all connections):

1. Attach the power cord to the rear panel.

2. Press the power button on the front panel.

How to shut down the PQA600C

To shut d

1. Select S

2. Select

CAUTION. To prevent system problems, do not use the computer “Sleep” mode on the PQA600C analyzer. Do not select

Sleep from the Start menu and do not conﬁgure the power saver settings on the computer to use the Sleep mode.

own the instrument:

tart > Shutdown.

Shutdown from the drop-down list in the Shutdown Windows dialog and then select OK.

How to remove power from the PQA600C

To remove power from the instrument:

1. Shut down the instrument.

2. After Windows has completed the shutdown process, remove the power cord from the rear panel.

6 PQA600C and PQASW User Manual

Network installation

You can connect your instrument to a network for printing, ﬁle sharing, internet access, and other functions. Consult with your network administrator and use the standard Windows utilities to conﬁgure the instrument for your network.

How to install the AJA driver

If the operating system on your PQA600C analyzer is reinstalled, you must also reinstall the AJA driver to support the SDI/HDMI vid

eo interface card. You can reinstall the AJA driver before or after y ou reinstall the PQ A software.

PQA600C install

ation

To re i nsta l

1. Insert the P

2. Double clic

3. Double cli

4. Open the Wi

5. Remove the

l the AJA driver, perform the following steps:

ck on the KonaDrivers-<version number>.msi ﬁle to install the driver.

QA600C and PQASW Application Install CD into the DVD drive on the PQA600C.

kontheAjaDrivers folder in the CD directory.

ndows Control Panel to view the AJA driver in the installed programs list.

CD from the CD drive and store it in a safe location.

PQA600C and PQASW User Manual 7

PQASW installat

ion

PQASW install

This section contains information on installing the PQASW software.

ation

PQASW standard accessories

The following table lists the standard accessories that are shipped with the PQASW software.

Table 5: PQA

Accessory

PQA600C and PQASW Installation and Safety Instructions

PQA600C and PQASW Measurements Reference

PQA600C and PQASW Application Install CD

Software Key Dongle

PQASW sy

The PC required to run the PQASW software must meet the following minimum requirements:

SW standard accessories

stem requirements

Tektronix part number

071-3439-X

071-3440-

020-3159 ———

-XX

Microsoft Windows 7 Professional (64-bit) or Windows XP Professional (32-bit) Operating System

NOTE. It is recommended that you install the PQASW software on a 64-bit system. The 64-bit installation includes a

Fast Decoder for faster processing on a wider range of compressed ﬁle formats. The 32-bit installation cannot access the Fast Decoder.

Intel Core 2 Duo CPU or more

1024 x 768 or higher resolution monitor

2 GB RAM or greater

1 GB free space on the hard drive for application storage; 50 GB or more free space recommended for data storage

8 PQA600C and PQASW User Manual

How to install the PQASW software

To install the PQASW software on your own PC, perform the following procedure:

1. If you already have an e xisting version of the PQA software installed, ﬁrst uninstall the existing version of the PQA

software using the Microsoft Windows C ontrol Panel. Otherwise, go to step 2.

2. Determine whether your system is running the 32-bit or 64-bit version of Windows. This information can generally be

found in the System Properties tabs of My Computer. Generally, if 64-bit is not speciﬁed under the System information, it is a 32-bit version. If you are not sure which version you have, contact Microsoft for speciﬁc details for your system.

3. Insert the PQA600C and PQASW Application Install disc in the DVD drive of the PC and close the drive tray.

4. Use Windows Explorer to view the disc contents. Double-click the 32Bit or 64Bit folder to open it.

5. Double-click setup.exe to begin the installation process.

6. When the PQA installer splash s creen appears, click Next to continue.

PQASW installat

ion

PQA600C and PQASW User Manual 9

PQASW installat

7. When the Setup Wizard welcome screen appears, click Next to continue.

8. When the Select Installation Folder screen appears, click Next to continue using the default settings. You can also

change the settings as follows:

ion

Use the Folder entry box or the Browse button to select a different installation location. Click the Disk Cost button to

here is enough disk space available.

verify t

ust me if you want the PQA software available to only you (the currently logged in user) instead of all

Select J users of the instrument.

10 PQA600C and PQASW User Manual

PQASW installat

9. The License Agreement screen appears. After you read the license agreement, select IAgree, and then click Next

to continue.

NOTE. If you cannot agree to the software license, click Cancel to exit the installation process, and then contact Tektronix

for more information.

ion

10. When the Conﬁrm Installation screen appears, click Next to continue. You will see an Installing PQA s creen with a

progress bar.

PQA600C and PQASW User Manual 11

PQASW installat

11. While the PQA installation progress bar screen is still open, a Setup Wizard welcome screen for the DK2 DESkey Drivers will op

CAUTION. Do not cancel the installation of the DESKey drivers. They are required by the PQA software.

ion

en. Click Next to continue.

12. When the Setup Type screen appears, click Next to accept This machine as the default location for the DK2.

12 PQA600C and PQASW User Manual

13. When the Windows Security screen appears, click Install to install the DK2 software.

14. When the Setup Complete screen appears, click Finish.

PQASW installat

ion

15. When the PQA product software installation is complete, the Installation Complete screen appears. Click Close to exit

the Setup Wizard.

PQA600C and PQASW User Manual 13

PQASW installat

16. The following three icons should now be on the desktop: and a PQA Product Information icon on the desktop. The former and the l and store it in a secure location.

Icon Description

17. Insert the software key dongle that came with your PQASW software into any USB port on your PC or instrument and

wait until you see the DK2usb DESkey installed message.

ion

atter allows you to access a You can now remove the Application Install disc from the DVD drive

Double-click

Double-click to open a Tektronix Web site with links to PQA product information and documentation.

Double-click to run the PQA software using the standard user login (with no administrator privileges) without being prompted to enter the Administrator’s password each time the PQA software is run from a standard user account.

NOTE. To use the Run As Administrator icon from any user account, you must log into the

Administrator account one time by double-clicking the icon and entering the password. After this initial Administrator login, this icon can be u sed to run the PQA software from any user account without being prompted to enter the Administrator password.

to launch the PQA software application.

18. Click Close to continue.

19. Find the software option key included in the important papers envelope that originally shipped with your instrument.

20. Double-click the PQA icon to start the software.

14 PQA600C and PQASW User Manual

PQASW installat

21. After the alert screen appears indicating that no PQA license is available, click OK to open the application.

NOTE. After you reinstall the PQA software, the ﬁrst time you run the program Windows 7 will display a User Account

Control dialog box that asks “Do you want to allow the following program from an unknown publisher to make changes to this computer?” The Program name is displayed as PQUI.exe. Answer Yes to the dialog box. This dialog box is a feature of Windows 7 and is a normal response by the operating system.

22. Click Help > License Manager in the menu bar and the License Manager screen will appear.

23. Type in the option key in the New Option Key ﬁeld.

24. Click Apply.

ion

25. Click Close.

26. When the screen appears indicating that the application will now close, click OK and the application will close.

27. Double click on the Tektronix PQA icon to verify that the PQA software window opens successfully. The product software

is now ready to use.

CAUTION. To operate the PQA software, the software key dongle must be installed on any USB port of the PQA600C

analyzer or computer running the PQA software. Otherwise, the PQA software will run only in trial mode.

This completes the installation of the PQASW. Your PQASW software is now ready to use.

PQA600C and PQASW User Manual 15

Operating basic

Operating bas

ics

PQA600C hardware components

Controls and display elements are shown in the following illustrations and tables.

PQA600C front panel controls and indicators

Ref number Item Description

1 Power button, power light

2 Hard drive activity light Random blinking light indicates hard disk drive activity

6 Microphone connector Used to attach a microphone

16 PQA600C and PQASW User Manual

USB 3.0 connector USB 3.0 compliant port (1)

Optical drive DVD-R/W optical drive

Optical drive eject button, activity light

Headphone connector Used to attach headphones

USB 2.0 connectors USB 2.0 compliant ports (3)

Turns the instrument on or off; illuminated light indicates power is on

Used to eject a DVD; random blinking light indicates optical drive activity

PQA600C rear panel connectors

Operating basic

Ref num

6Mou

8 Display port

10 Mini-HDMI video

12 Power connector

ber

Item Descri

/microphone and

Line in line out connectors

Serial port Serial connector

USB 2.0 ports USB 2.0 connectors (2)

USB 3.0 ports USB 3.0 connectors (4)

ork adapter

Netw

se and keyboard

connectors

l link DVI port

Dua

–––

–

onnectors

SDI video connectors BNC connectors for SD/HD/3G SDI video generation and capture

ption

Line-level audio input and output connectors

Ethernet network interface connector

PS/2 mouse and keyboard connectors

HDCP compliant, dual-link DVI video display connector (maximum port resolution is 2560 × 1600)

HDCP compliant, Display port connector; a Display port-to-DVI adapter

ble is supplied as a standard accessory (maximum port resolution is

ca 3840 × 2160)

o not use this connector

ini-HDMI connectors for HDMI video generation and capture

AC line connector

PQA600C and PQASW User Manual 17

Operating basic

How to start or exit the PQA software

Starting the PQA software

To start the PQA application s oftware:

1. Verify that the software key dongle that was supplied with the product is installed on any USB port of the PQA600C analyzer or

CAUTION. To operate the PQA software, the s oftware key dongle must be installed on any USB port of the PQA600C

analyzer or computer running the PQA software. Otherwise, the PQA software will run only in trial mode.

computer running the PQA software.

2. Select Start > Pro

NOTE. To access the latest PQA product information, double-click the PQA Product Information desktop icon.

grams > Tektronix > PQA or double-click the Tektronix PQA desktop icon.

Exiting the PQA software

To exit the PQA application s oftware:

Select File > Exit.

18 PQA600C and PQASW User Manual

Display elements and menus

PQA home page display elements

Operating basic

Ref number Item Description

1 Measure button

4 Review button Use the Review button to change the view to Review. In the Review view,

6 Tile View button

Gen / Cap button Use the Gen / Cap button to generate/capture an SDI/HDMI video signal

Current button Use the Current button to change the view to Current. In the Current

Summary View button Select to display the Summary View screen. The Summary View screen

The Measure button performs multiple functions. Use it to display the Conﬁgure Measure window (which allows you to select or conﬁgure measurements), to initiate measurements, and to stop currently running measurements.

(PQA600C only) or an IP video stream (Option IP only).

view, you can conﬁgure and run measurements. You can also click this button to switch between reviewing results and checking the progress of a running measurement.

you can select video clips for review and analysis. You can use this button while a measurement is running to review results, though you cannot view running measurement results until they are complete.

shows the reference video, test video, map, and the graph display.

Select to display the Tile View scr een. The Tile View screen shows three screens in a horizontal arrangement: the reference v ideo at the top, the test video in the middle, and the map at the bottom.

PQA600C and PQASW User Manual 19

Operating basic

Ref number Item Description

8 Event Log

12 Units selector

14 Frame s

16 Measurement readout

17 Navigation pane

18 Results path The Results Path readout shows the path to the directory c ontaining the

tton

hs button

IOut

elector

utton

Select to disp mixes two sources for display. Using a slide bar, you can specify which source makes up most of the display.

Select to display the Event Log screen. The Event Log displays measurement

Use the Conﬁ

Use the Upda specify the Output Spatial ROI boundary.

videotape or DV D player.

Sets the selector bar to select video frames by frame number or elapsed time.

PQA600C output connector and to output the Test ﬁle to the Channel 2 output connector while reviewing the measurement results (or in review mode). Use the S video interface is assigned to each channel (SDI, HDMI).

Use this slider bar to select which frame of the video clip to display.

can also enter a frame number or time to display into this readout.

The readout displays the minimum, maximum, and overall values for the

cted measurement.

sele

The N

ected measurement results ﬁle.

sel

Overlay View b

Conﬁgure bu

Update Grap

Control bar Controls the playback of video. Functions like the playback controls on a

SDI/HDM

Frame/Time readout The readout indicates the display frame-by-frame number or time. You

lay the Overlay View screen. The Overlay View screen

s which exceed the settings for warnings and errors.

gure button to control the Output Spatial ROI settings.

te Graphs button to recalculate measurements after you

only: Select to output the Reference ﬁle to the Channel 1

imultaneous Generate and Capture window to conﬁgure which

avigation Pane is used to select measurement results for review.

20 PQA600C and PQASW User Manual

Simultaneous Generate and Capture page display elements

Operating basic

Ref number Item Description

Channel 1 Mode selection Use the drop-down list to select from the following modes for Channel 1:

Capture or generate video using the SDI interface, capture or generate video using the HDMI interface, capture or generate video using the IP interface (Option IP only).

Convert to Format controls

Channel 1 Preview pane Displays a preview of the video for the selected Channel 1 video mode.

Click the Convert to Format check box to enable/disable the format conversion function. When enabled, use the “From” and “To” drop-down lists to convert the format of the video input or output to a desired format. The available conversion formats depend on the format of the video source. The “From” format must match the format of the source video. Use the Convert Modes button to conﬁgure the conversion mode.

The preview is not displayed until the Channel 1 Format setting matches the video source. In addition, HDCP mode must be enabled in order to view video with HDCP content.

NOTE. When the PQA software is running, if the HDCP compliant

monitor is disconnected and reconnected, then the monitor will no longer be recognized being HDCP compliant and the preview pane will no longer show HDCP content. In this case, you need to close and reopen the PQA application.

PQA600C only: If you use the computer “Sleep” mode on the PQA600C analyzer, it is equivalent to disconnecting and reconnecting the monitor as described above.

PQA600C and PQASW User Manual 21

Operating basic

Ref number Item Description

9BrowseD

11 Format selection

HDCP Content m

essage

The HDCP Conte

nt message is displayed when the selected video source

contains HDCP content.

Rec / Stop controls Use the Rec / Stop buttons to manually start or stop a video capture.

Start Capture and Stop Capture controls

Use the Start Capture and Stop Capture controls to conﬁgure how the video capture will be controlled. You can control the capture manually or by referenc

ing the capture start and stop times to the output generation of the other channel. When you use the output generation of one channel to control the capture on the other channel, you can enter a time delay to

for video system delays between the PQA output and input.

ilable RAM and Disk Space readouts to determine the

f the video source has HDCP content, the video can only be

Available

RAM Space, Disk Space, and Time Elapsed readouts

compensate

Use the Ava available space for a video capture. The amount of space available is listed in frames and seconds and depends on the format of the video source. I captured to RAM. The Time Elapsed readout shows the size of the video capture.

Capture To entry box Use this entry box to manually enter the location and ﬁle name of the

video ﬁle. If the ﬁle is to be stored in RAM, enter the following

capture

MEM:\<file name> (MEM must be capitalized).

the RAM memory for the video capture location and to enter a ﬁle

isk and Browse Memory buttons

directory path:

Use the Browse Disk button to browse the hard drive for the video capture location and to enter a ﬁle name. Use the Browse Memory button to browse name. Video with HDCP content can be captured only to RAM memory and cannot be played out.

Clock Selection Use the Clock Selection drop-down list to select the reference clock used

ture or generate video.

to cap

he Format drop-down list to manually select the format of the video

Use t source(s). Use the AutoSet button to have the PQA software automatically detect and set the format of the video source(s).

. When Channel 1 and Channel 2 are both in use at the same time

NOTE

(simultaneous generation/capture), the formats of the video signals for both channels must match.

Enable HDCP button The HDCP button appears when one of the c hannels is set to capture

om the HDMI interface. In this c ase, you must click this button to enable

fr the PQA software to view any HDCP content in the v ideo.

Channel 2 Mode Use the drop-down list to select from the following modes for Channel 2:

Capture or generate video using the SDI i nterface, capture or generate

ideo using the HDMI interface, capture video using the IP interface

v (Option IP only). You cannot generate IP video from Channel 2.

Convert to Format controls

22 PQA600C and PQASW User Manual

Ref number Item Description

16 Video repl

18 Browse Disk and Browse

Channel 2 Prev

Current frame controls

Memory b

Conﬁgu Close, and Help buttons

Generate From entry box Use this entry box to manually enter the location and ﬁle name of the video

iew pane

ay control bar

uttons

re Measure,

Displays a pre The preview is not displayed until the Channel 2 Format setting matches the video source. In addition, HDCP mode must be enabled in order to view video wit

NOTE. When the PQA software is running, if the HDCP compliant

monitor is disconnected and reconnected, then the monitor will no longer be recognize show HDCP content. In this case, you need to close and reopen the PQA application.

PQA600C only: If you use the computer “Sleep” mode on the PQA600C analyzer, i as described above.

Use these buttons to control the replay of video clips.

Use the sli points within the video clip for the portion of the clip you want to output. Use the Current Frame box to specify the exact frame where you want the video

Use the B the video clip you want to generate. Use the Browse Memory button to browse RAM memory for the video clip you want to generate. Video with HDCP con

Use the Close button to close the Simultaneous Generate and Capture window.

ﬁle you want to generate. If the ﬁle is stored in RAM, enter the following direc

t is equivalent to disconnecting and reconnecting the monitor

to start.

rowse Disk button to browse the hard drive for the location of

Conﬁgure Measure button to conﬁgure a measurement. Use the

tory path:

Operating basic

view of the video for the selected Channel 2 video mode.

h HDCP content.

d being HDCP compliant and the preview pane will no longer

der controls or the From and To boxes to set the start and stop

tent cannot be generated.

MEM:\<file name> (MEM must be capitalized).

Menu commands

The commands available from the Menu bar are described in the following table.

Menu Command Description

File

PQA600C and PQASW User Manual 23

Working Directories Use to add directories to the Navigation Pane.

Update Sequence List Use to update c ontents of directories in the

Navigation Pane.

Import Measures

Exit

Use to import user conﬁgured measures that have been saved in another location or PQA600C/PQASW.

Sends a screen capture of the PQA application window to the printer.

Quits the PQA application.

Operating basic

Menu Command Description

View

Conﬁgu

xecute

Help

Current Measu

Review

Summary View Sets the disp

Tile

Overlay Sets the dis

Event Log

Result 1

Result 2

Loop

Measures

Generation/Capture Displays the Capture window to enable you to

Display Settings Displays the Display Settings window. From

oder Settings

Dec

NOTE. This menu selection appears

on 64-bit systems only. 32-bit

stems always use the S tandard

sy Decoder.

easures

Script

Help Topics

Tektronix Home Page Displays the Tektronix Web site in a browser

License Manager Displays the License management window to

About the PQA Displays version information about the PQA

Sets the View t

Sets the dis

Sets the di

Selects w Overlay view as Result 1.

Selects which sources are displayed in the Overlay view as Result 2 (two results ﬁles must be selec

Sets pla

ys the Conﬁgure Measures window to

Displa enable you to create and conﬁgure measurements.

conﬁgure Capture settings.

isplay settings window, you can set the

the D brightness and contrast for result maps, specify the colors used in the Summary View Graph, and

ideos to ﬁt the window.

set v

plays the Decoder Settings window. From

Dis the Decoder Settings window, you can select the Standard Decoder or the Fast Decoder.

e S tandard Decoder uses the MTS4EA

Th reference decoder and is the same decoder used in earlier versions of the PQA software. The Fast

coder uses the Cerify optimized decoder, which

De covers a wider range of compressed ﬁle formats and performs the decoding faster. However,

ompatibility between the two decoders is not

c guaranteed.

nitiates a measurement.

Initiates an XML script.

Displays a PDF version of the PQA600C and

PQASW User Manual

window.

enable you to enter a new license key (Option Key) to enable software options, and to see which options are currently available.

Picture Quality Analyzer.

o Current.

oReview.

lay area to Summary View.

play area to Tile View.

play area to Overlay View.

splay area to the Event Log.

hich sources are displayed in the

ted to display two results).

yback to loop mode.

24 PQA600C and PQASW User Manual

How the PQA analyzer works

Based on the concepts of the human vision system, the PQA provides a suite of repeatable, objective quality measurements that closely correspond with subjective human visual assessment. To provide picture quality measurements, the PQA takes two video ﬁles as inputs: a reference video sequence and a compressed, impaired, or processed version of the reference. First, the PQA performs a spatial and temporal alignment between the two sequences. The automatic spatial and temporal alignment allows picture quality measurements to be made among different resolutions and frame rates (the alignment can also be performed manually). After spatial and temporal alignment, the PQA analyzes the quality of the test video, using measurements based on the human vision system and attention models, and then reports quality measurements that are highly correlated with subjective assessments. The results include overall quality summary metrics, frame-by-frame measurement metrics, and an impairment map for each frame. The PQA also provides traditional picture quality measures such as PSNR (peak signal-to-noise ratio).

A reference video sequence and test sequence can have different resolutions. The PQA can provide picture quality measurements using any combination of formats, such as HD and SD, or SD and CIF. The PQA can also support measurement clips with unlimited sequence duration, allowing a full-length movie to be quantiﬁed for picture quality through various conversion processes.

You can use the PQA600C to capture SD/HD/3G SDI and HDMI compliant with HDCP video signals in a ﬁle for analysis.

With Option IP installed, the PQA can generate and analyze IP video streams.

Operating basic

Figure 3: How the PQA analyzer works

PQA600C and PQASW User Manual 25

Making measurem

ents

Making measurements

The analysis process

Analyzing picture quality with the PQA analyzer is, broadly speaking, a two step process. First, you take a measurement and second, you review the analysis results. Once the measurement is complete, you can choose several ways to review the results.

In taking a measurement, you select a measurement (either a template measurement or a user-created measurement) from the Conﬁgure Measure dialog box. After selecting the measurement, you specify the video ﬁle(s) on which the measurement will be taken. Some measurements apply to a single ﬁle, though most compare a test ﬁle to a reference ﬁle. Once you have speciﬁed the video ﬁles on which to take the measurement, you initiate the measurement.

In the second s tep, you review the analysis results after the measurement is completed. You can view the results in several ways.

How to select a measurement (Option BAS and Option ADV only)

To select a measurement:

1. Click Measure to display the Conﬁgure Measure dialog box.

2. Select a measurement from the list of Measures.

Table 6: Measurements and their processing nodes

Measurement Name

000 View Video

001 SD Broadcast PQR

002 HD Broadcast PQR

003 CIF and QVGA PQR

004 D-CINEMA PQR

005 SD Broadcast DMOS

006 HD Broadcast DMOS

007 CIF and QVGA DMOS

008 D-CINEMA DMOS

009 SD Broadcast ADMOS

010 HD Broadcast ADMOS

Display Model

——— — — — —

View Model PSNR

— ——

— —

Perceptual Difference

Artifact Detection

Attention Model

Summary Node

26 PQA600C and PQASW User Manual

Table 6: Measurements and their processing nodes (cont.)

Making measurem

ents

Measurement Name

011 CIF and QVGA ADMOS

012 SD Sports Broadcast ADMOS

013 HD Sports Broadcast ADMOS

014 Talking Head Broadcast ADMOS

015 SD DVD from D-Cinema DMOS

016 CIF from SD Broadcast DMOS

017 SD from HD Broadcast DMOS

017-A Reference: SD, Test: HD Broadcast DMOS

018 QCIF from CIF and QVGA DMOS

019 Stand-alone Attention Model

020 PSNR dB

1 Removed Edges

02 Percent

2 Added Edges

02 Percent

23 Rotated Edges

0 Percent

024 DC Blocking Percent

025 Removed Edges Weighted PSNR dB

026 Added Edges Weighted PSNR dB

027 Rotated Edges Weighted PSNR dB

028 DC Blocking Weighted PSNR dB

029 Artifact Annoyance Weighted PSNR dB

Display Model

——— — —

——

—

View Model PSNR

— —

— ——

—— —

Perceptual Difference

———

— —

Artifact Detection

Attention Model

Summary Node

PQA600C and PQASW User Manual 27

Making measurem

Table 6: Measurements and their processing nodes (cont.)

ents

Measurement Name

030 SD DVD from D-Cinema Artifact Weighted PSNR dB

031 CIF from SD Broadcast A rtifact Weighted PSNR dB

032 SD from HD Broadcast A rtifact Weighted PSNR dB

033 QCIF from CIF and QVGA Artifact Weighted PSNR dB

034 Attention Weighted PSNR dB

035 No Reference DC Blockiness Percent

036 HD ADMOS ITU-BT500 with Interlaced CRT

037 HD PQR ITU-BT500 with Interlaced CRT

038 HD DMOS ITU-BT500 with Interlaced CRT

Display Model

—

——

——— —

View Model PSNR

— —

— ——

Perceptual Difference

— —

——

Artifact Detection

Attention Model

—

Summary Node

Template measurem ents (Option BAS and Option ADV only)

The PQA application software is conﬁgured with 38 template measurements. These measurements are optimized for

variety of uses. Although you cannot change the parameters of the template measurements, you can create new

a measurements based on a template measurement and save the new measurement under a different name. Measurements are deﬁned through a series of conﬁguration nodes. You change measurement parameters by selecting a conﬁguration

ode and adjusting its settings to suit your requirements.

NOTE. To accurately simulate the procedure called out in the ITU BT.500 standard, all DMOS predictions require a worst

case training. To p rovide this training, take the selected DMOS measurement once with an example of the worst case video expected for the application according to ITU BT.500 worst case training recommendations. A fter you have taken the measurement, use the Import function in the Summary Node for the measurement to import the Minkowski value from the measurement results csv ﬁle. This sets the training bias for your application as if you were conducting a subjective rating study according to ITU BT.500. Save this new summary setting as your custom measurement for this application with your custom training.

28 PQA600C and PQASW User Manual

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Table 7: Template measurements

Measurement Cl

Subjective Prediction: Full Reference

ass

Noticeable Differences

SD Display and Viewing 001 SD Broadcast PQR

HD Display and Viewing

CIF Display and Viewing 003 CIF and QVGA PQR

D-Cinema Projector and Viewing 004 D-CINEMA P QR

Subjective Rating Predictions

SD Display and Viewing (with preliminary BT.500

trainin

HD Disp

lay and Viewing (with preliminary BT.500

training)

CIF Display and Viewing (with preliminary BT.500 training)

D-Cinema Projector and Viewing (with preliminary

0 training)

BT.50

ntion Biased Subjective Rating Predictions

Atte

isplay and Viewing (with preliminary BT.500

SD D training)

HD Display and Viewing (with preliminary BT.500 training)

CIF Display and Viewing (with preliminary BT.500

aining)

D Sports (with preliminary BT.500 training)

SD Talking Head (with preliminary BT.500 training)

Repurposing: Reference and test are independent: Use any combination display model and viewing conditions with each measurement above

Format Conversion: Cinema to SD DVD (with preliminary BT.500 training)

Format Conversion: SD to CIF (with preliminary BT.500 training)

Format Conversion: HD to S D (with preliminary BT.500 training)

Format Conversion: SD to HD (with preliminary BT.500 training)

Format Conversion: CIF to QCIF (with preliminary BT.500 training)

Attention

Measurement Na

000 View Video

002 HD Broadcast PQR

005 SD Broadcast DMOS

006 HD B

roadcast DMOS

007 CIF and QVGA DMOS

008 D-CINEMA DM O S

SD Broadcast ADMOS

009

010 HD Broadcast ADMOS

011 CIF and QVGA ADMOS

12 SD Sports Broadcast ADMOS

13 HD Sports Broadcast ADMOS

014 SD Talking Head Broadcast ADMOS

015 SD DVD from D-Cinema DMOS

016 CIF from SD Broadcast DMOS

017 SD from HD Broadcast D MOS

017-A HD from SD Broadcast DMOS

018 QCIF from CIF and QVGA DMOS

019 Stand-alone Attention Model

PQA600C and PQASW User Manual 29

Making measurem

Table 7: Template measurements1(cont.)

Measurement Class Measurement Name

Objective Measurements: Full Reference

Attention Weighted Objective Measurements

Objective Measurements: No Reference

Measurements with Performance Report

The unshaded template measurements are available with Option BAS. The shaded measurements are available with Option ADV.

Please refer to the application note Objective Measurements and Subjective Assessment (literature number 28W-24876-0)

ents

General Difference

020 PSNR dB

Artifact Measurement

Removed Edges 021 Removed Edges Percent

Added Edges 022 Added Edges Percent

Rotated Edges 023 Rotated Edges Percent

% of original deviation from block DC 024 DC Blocking Percent

Artifact Classiﬁed (Filtered ) PSNR

Removed Edges

Added Edges

Rotated Edges

025 Removed Edges Weighted PSNR dB

026 Added Edges Weighted PSNR dB

027 Rotated Edges Weighted PSNR dB

% of original deviation from block DC 028 DC Blocking Weighted PSNR dB

Artifact Annoyance Weighted (Filtered ) PSNR

PSNR with default artifact annoyance weights 029 Artifact Annoyance Weighted PSNR dB

Repurposing: Use view model to resample, shift and crop test to map to reference

Format Conversion: Cinema to SD DVD 030 SD DVD from D-Cinema Artifact Weighted

PSNR dB

Format Conversion: SD to CIF 031 CIF from SD Broadcast Artifact Weighted

PSNR dB

Format Conversion: HD to SD 032 SD from HD Broadcast Artifact Weighted

PSNR dB

Format Conversion: CIF to QCIF 033 QCIF from CIF and QVGA Artifact Weighted

PSNR dB

General Difference

PSNR 034 Attention Weighted PSNR dB

Artifact

DC Blockiness 035 No Reference DC Blockiness Percent

ADMOS 036 HD ADMOS ITU-BT500 with Interlaced CRT

PQR 037 HD PQR ITU-BT500 with Interlaced CRT

DMOS 038 HD DMOS ITU-BT500 with Interlaced CRT

30 PQA600C and PQASW User Manual

Overview of the measurement process

This section provides an overview of the following steps that are required to use the PQA to measure picture quality.

Step 1 – Prepare the Reference and Test ﬁles

The full reference measurements (e.g. PSNR, DMPS, PQR) offered by the PQA require a Reference ﬁle to measure against the ﬁles. (See page 171, Capturing and generating video.)

Step 2 – Perform the PSNR measurement (020 PSNR dB)

It is suggested that you run the PSNR measurement prior to the DMOS/PQR measurements to make sure that the temporal / spatial alignments are precisely done. If the PSNR shows higher score than expected, then you may need to check the temporal / spatial alignment setting again. (See page 84, Performing temporal synchronization and spatial alignment of sequences.)

picture quality of the Test ﬁle. The PQA600C offers the following methods to create the Reference and Test

Capturing an SDI or HDMI input signal (PQA600C only)

Capturing a compressed stream using the IP interface then decoding it using the internal decoder (Option IP only)

Copying a video ﬁle using Windows Explorer or FTP

Making measurem

ents

Step 3 – Perform the PQR/DMOS measurements (002 HD Broadcast PQR, 006 HD Broadcast DMOS)

It is suggested that you run the PQR/DMOS m easurement afte r you run the PSNR measurement since it takes a longer time to run. The PQR measurement will offer an accurate score when the test content has small impairments that may not be

le. If the test content has obvious visible impairments, then the DMOS measurement will offer a more accurate score

visib that matches a person’s perception with the appropriate worst case training sequence set. For more information, refer to PQR/DMOS measurement and the way to setup the worst case sequence in the application note (28W-24876-0).

4 – Perform the attention weighted measurements (034 Attention weighted PSNR)

Step

The “034 Attention weighted PSNR” measurement provides a PSNR score in the region of the interest where the PQA application predicts that viewers will pay more attention in order to provide a more accurate picture quality rating. The “019 stand-alone attention model” measurement can be used to conﬁrm how the PQA application predicts the region where the viewers will pay more attention on the given content. You can use the pre-conﬁgured attention weighted PQR/DMOS measurements (009- 014, 036), or y ou can create an attention weighted PQ R/DMOS measurement by modifying a pre-conﬁgured measurement.

Step 5 – Diagnose the impairments using the artifact weighted test (025 – 028 Artifact classiﬁed PSNRs)

The 025-028 measurements offer the PSNR score with each artifact weighting. A set of these measurement results w ill indicate the dominant artifact impairment in the test content. You can c reate artifact weighted PQR / DMOS measurement by

odifying the pre-conﬁgured measurements.

PQA600C and PQASW User Manual 31

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ents

Creating new measurements (Option ADV only)

You can create measurements by modifying an existing template measurement or by adding a measurement and then adjusting the necessary parameters in the processing nodes.

To create a new measurement:

1. Click the Measure button.

2. To create a new measurement

based on a template measurement, select a numbered template measurement from the Measures list and click Edit.

3. To add a new measurement, click Add.

32 PQA600C and PQASW User Manual

If you click Add to create a new measurement, the PQA analyzer displays the E with only one processing node. The measurement has no name or description

4. To change the parameters of

your measurement, right-click on a processing node and select Conﬁgure. Change the parameters to suit your requirements.

dit Measure window

Making measurem

ents

To add a processing node to

your measurement, select the desired node at the top of the window and drag it into the Process Workﬂow area.

NOTE. The PSNR and Perceptual

Difference processing nodes are mutually exclusive. A measurement cannot contain both nodes.

To remove a processing node

from your measurement, right-click on the processing node and select Remove.

PQA600C and PQASW User Manual 33

Making measurem

5. When you are ﬁnished setting the parameters for your new measurement, measurement in the Name ﬁeld.

ents

type a name for the

If you based your measurement

on a template measurement, the Name ﬁeld a name in it based on the template measurement (Copy of <templat PQA analyzer will not allow you to replace a template measuremen

already has

e name>). The

6. If you wish for your measurement in the Description ﬁeld.

7. Click OK to save your new measurem

Your new measurement will now appear at measurements in the Con ﬁgure Measure window.

, enter a description

ent.

the bottom of the list of

34 PQA600C and PQASW User Manual

Conﬁguration nodes

The parameters that control how a measurement is taken are deﬁned by Conﬁguration Nodes. Measurement parameters are grouped into several conﬁguration nodes. Each conﬁguration node groups related parameters together. You customize a measurement by adding or removing conﬁguration nodes to the measurement and by changing the parameters within the conﬁguration nodes. To access the conﬁguration nodes of a measurement, select the measurement and then click Edit from the Conﬁgure Measure window.

Making measurem

ents

PQA600C and PQASW User Manual 35

Making measurem

You change the parameters within a conﬁguration node by right-clicking on the conﬁguration node and selecting Conﬁgure from the pop-up

ents

menu.

The following paragraphs list the conﬁguration nodes and the parameters they control. Some of these nodes are not included in every measurement. Two of the nodes (PSNR and Perceptual Difference) are mutually exclusive.

Display Model

Parameters controlled by this node. Display technology: CRT, LCD, or DMD. Each technology has user-conﬁgurable

ters (Interlace/Progressive, Gamma, Response time, and more). Parameters for the Reference Display and the Test

parame Display can be set independently.

Usage. Displays can have a profound effect on perceived video quality. For example, a slow LCD can mask and

emphasize different types of distortion. Also, LCDs can add their unique distortion artifacts. Use this setting to make sure that the viewer response is properly modeled by ensuring the conversion from input video to light is properly modeled.

View Model

Parameters controlled by this node. Viewing distance, Ambient Luminance for Reference and Test (can be set

ependently). Image cropping and registration: automatic or manual control of image cropping and test image contrast

ind (ac gain), brightness (dc offset), horizontal and vertical scale and shift, and speed versus accuracy of the scale and shift correction ﬁlters.

Usage. The View M odel accounts for important aspects of the light that actually reaches the eye, accounting for the

environment between the display and the eye. Although ITU BT.500 provides detailed viewing conditions, the actual viewing conditions of your application might not match the BT.500 recommended conditions. This node enables you to adapt the measurement conﬁguration to your viewing conditions, including the addition of ambient light as required by ITU BT.500.

36 PQA600C and PQASW User Manual

Making measurem

PSNR

Parameters controlled by this node. There are no parameters for PSNR. You can only choose whether the PSNR

result is included as part of the measurement.

Usage. Though not nearly as accurate for predicting video quality as measurements that use the human vision model,

PSNR is a s imple, fast, and objective measurement that can be used for:

Determining if there is 0 objective difference (bit to bit accuracy) or, if there is a difference.

A rough guide, in cases where low predicted quality measurement accuracy is O K.

The smaller the display is within the viewer's ﬁeld of vision, the more accurate PSNR can be. So, for example, for CIF video on a handheld display that is 10 screen heights away, studies show that PSNR can be useful as a quality metric under the right viewing conditions and video content. At the opposite extreme, PSNR generally does a poor job of predicting video quality ratings when compared with the Human Vision Model used by the PQA when evaluating an HD, 2K, 4K line video clip viewed at 2 screen heights, especially if the encoder is doing a good job.

Perceptual Difference

Parameters controlled by this node. Viewer characteristics (acuity, sensitivity to changes in average brightness,

response speed to the moving object, sensitivity to photosensitive epilepsy triggers, and more).

ents

Usage. Use the Perceptual Difference node to account for target audience differences in perception. You can use the

Perceptual Difference node to model teens watching video on cell phones or football fans watching an HD game on a 58-inch LCD TV. You can also use this node to model for discriminating “expert” users that have different types of higher sensitivities. For example, some expert users may be have better acuity or some may be more able to see ﬂashes of (short temporal) distortions. As an example of an expert application, suppose you want to achieve no perceived differences between your test and reference video, but you know the encoder being used can have very short (1 frame) distortions. You could be more conservative than the PQA Expert setting by adjusting the temporal sensitivity higher.

Two included user types are typical and expert. The typical viewer included is most appropriate for general population simulation as would be included in a DMOS experiment.

Attention Model

Parameters controlled by this node. Overall attention weighting for measures and for each class of attention attractor:

Temporal (motion).

Spatial (center, people (skin), foreground, contrast, color, shape, size).

Distractions (differences between test and reference v ideo, such as artifacts).

Usage. Adding the attention model to a measurement improves predicted DMOS accuracy slightly (the amount depends

on many things, but, as with PSNR, the degrees of ﬁeld of view taken by the display is the most important). Unlike PSNR, the larger the display is in the ﬁeldofview,themoreth quality ratings are statistical and that a video clip with the best mean quality score might not have the best score among the top-most critical portion of the audience. When the attention model is not included in a measurement, the video quality rating is predicted for viewing the video at all portions of t very carefully to see if any part of the video is different from a reference). However, this is not generally how people watch video. Instead, people tend to look at mostly the same kinds of things, such as people, action and the motion of objects, usually ignoring the background. People are much mo they are not. The attention model predicts a probability map that indicates where people are most likely to look. For DMO S measurements, this is used to weight the perceptual sensitivities accordingly, thereby improving the DMOS prediction.

e attention model improves in accuracy. Keep in mind that video

he screen evenly (the equivalent of many eyes watching different portions

re sensitive to seeing artifacts if they are looking directly at them than if

PQA600C and PQASW User Manual 37

Making measurem

The attention model can also be used with PSNR and artifact detection: it weights the respective measurement maps with the attention p

ents

robability to give the portion of distortion that is within the most viewed areas.

The parameter are most important. For a nature show, motion and color might be more important. For a talk show, people and foreground might be most important.

Artifact Det

s would normally be adjusted to ﬁt the task of a viewer. For examples, for sports, usually people and motion

ect

Parameters controlled b y this node. Added Edges (Ringing/Mosquito Noise), Removed Edges (Blurring), Rotated

Edges (Jaggies, Edge Blockiness) and DC Blockiness (Removed detail within a block).

Usage. This node is used to detect artifacts of different fundamental classes that might be related to particular causes

such as enc example, DC Blockiness shows up in MPEG-2 video when excess quantization takes place. Including this node in a measurement is especially useful because these types of artifacts are often cited by viewers as features they ﬁnd especially objective engineers make design or conﬁguration trade-offs in a way that optimizes conﬂicting trade-offs.

Edge measurements are made by comparing the test and reference luminance gradient at each reference pixel. In this way, jaggies are detected as reference diagonal gradients rotated to the vertical or horizontal directions.

Summary

oder ﬁlters and excess quantization and analog distortions such as reduced bandwidth of baseband video. For

. Because some people ﬁnd one type of artifact less objectionable than another, measuring these artifacts can help

Node

Parameters controlled by this node. Statistical Units (PSNR, Perceptual Difference, B lockiness). Measure Map

settings: Gain, Offset, display as signed data. Worst Case Training for ITU-R BT.500 Training (Default or User application tuned, determined by Worst Case example).

Usage.

maps and reduces each to a scaler (a single number) of a particular measurement unit. It also takes a sequence of these summary measurement scalers produced over time (one per measurement map per ﬁeld or frame) and produces a single seque produced per time sample (at the highest r ate of ﬁeld or frame rate) and reduces this map to a DMOS score per time and an overall sequence DMOS score at the end of the measurement. The same processing occurs for measurements such as PSNR, requirements that are speciﬁed in the conﬁguration of the summary node.

In general, the summary node is used to specify how results are reported. The summary node takes m easurement

nce summary measurement scaler. For example, a predicted DMOS measurement has a perceptual difference map

PQR, and Artifact Detection. To reduce the maps to scalars, there are certain choices of units, training and other

38 PQA600C and PQASW User Manual

Changing conﬁguration node settings

Display Model

The Display Model parameters are used to specify the display technology used by the viewer and the parameters of the display. The DMD (digital micromirror device).

To change the display model parameters:

1. Right-click the Measure button.

2. Select the desired measurement

from the Conﬁgure Measure window.

NOTE. If you choose a template

measurement, you will have to save the chang new name.

re are three choices for the type of display used: CRT (cathode ray tube), LCD (liquid crystal display), and

ed measurement under a

Making measurem

ents

3. Click Ed

it.

PQA600C and PQASW User Manual 39

Making measurem

ents

4. Right-click Di

splay Model and

select Conﬁgure.

5. Select the display technology from the Technol ogy drop-down list.

6. Select Custo m from the Applicat

ion drop-down list.

After you select Custom, the Custom drop-down list is enabled.

40 PQA600C and PQASW User Manual

The Edit Custom window contains two groups of settings: Display Properties and CRT/DMD/L

CD-speciﬁc properties. The parameters in the Display Properties group are the same for every dis

play technology, though the values differ. The parameters in the CRT/DMD/LCD Properties group change depen

ding on the technology. The illustrations to the right show the difference in the properties for an LCD display and

aCRTdisplay.

Making measurem

ents

7. Edit the set

tings as necessary to

suit your requirements.

Click Restore D efaults to

return all settings to the initial factory va

Click Und

lues.

oChangesto return all settings to the previously saved values.

8. Click OK to save your changes.

NOTE. The interlaced CRT setting

requires "Top ﬁeld First" i nterlaced video content. If "Bottom ﬁeld First" content is supplied, the display simulation might be inaccurate.

LCD display properties

CRT display properties

PQA600C and PQASW User Manual 41

Making measurem

The following table lists the parameters that can be set in the Display Model conﬁguration node.

Table 8: Display model parameters

Parameter Setting Usage

Apply To:

Optimize for

Technology

CRT Broadcast Monitor, Consumer TV, Computer

LCD LCD TV,

DMD

ents

Reference Select w hen specifying the settings for the

Reference vi

Test

Both Reference and Test Select when specifying the settings to use for

Accuracy

Speed Reserved for future use.

CRT / DMD / LCD Select the appropriate display.

Monitor

Computer LCD Monitor, Mobile

Device

Digital Cinema, Business Boardroom, Home Entertainment

Select when Test video.

both Reference and Test video.

Reserved for future use.

Select for the display application.

Select

Select for the display application.

deo.

specifying the settings for the

for the display application.

llowing tables list the default values for the Display Model parameters. If the display you want to test for has

The fo different parameters than the default values shown in these tables, you must create a custom conﬁguration ﬁle that sets the display parameters as required.

Table 9: P redeﬁned CRT display parameters

Display Properties Broadcast

Monitor

Maximum Luminance 103 450 103 103 103

Brightness 2.27 2.27 2.27 2.27 2.27

Equivalent Gamma

Contrast

spect ratio

RT Properties

Phosphor Persistence (ms)

Interlaced 1 1 0 1 0

Progressive 0 0 1 0 1

.33

10.0 10.0 10.0 45 10

Consumer TV

.33

Computer

itor

Mon

.33

Custom

ault

Def

.33

HD Default

.77

42 PQA600C and PQASW User Manual

Table 10: Predeﬁned LCD parameters

Making measurem

ents

Display Properties

Maximum Lumin

Brightness 2.27 2.27 2.27 2.27

Equivalent Gamma

Contrast

Aspect ratio 1.77 1.33 1.33 1.33

LCD Properties

Horizonta

Vertical Resolution 1080 1200 240 1080

Gray Levels

Contrast Ratio

Response Time (ms)

ance

l Resolution

LCD TV Computer

Monitor

450 250 450 450

2.0 2.0 2.0 2.0

100 100 100 100

1920 1600 320 1920

256 256 64 256

2000 500 100 2000

62080 6

Mobile Device

Table 11: Predeﬁned DMD parameters

Display Properties

Maximum Luminance 50 30 30 100

Brightness 2.6 2.27 2.27 2.2

Equivalent Gamma

Contrast

ct ratio

Aspe

DMD Properties

Horizontal Resolution 2048 1280 1280 1280

tical Resolution

Ver

ay Levels

lCinema

Digita

2.3 2.3 2.3 2.3

100 100 100 100

1.77 1.33 1.77 1.33

108

4096 255 255 1024

Business

oom

Boardr

720 720 720

Home Entert

ainment

Custom Default

Custom

Default

PQA600C and PQASW User Manual 43

Making measurem

View Model

The View Model speciﬁes the conditions under which the display is viewed and, optionally, performs spatial alignment, cropping, gain, and DC offset adjustment to match the test video to the reference video. You can set values such as the viewing distance and ambient luminance level.

To change the view model parameters:

1. Right-click the Measure button.

2. Select the desired measurement

from the Conﬁgure Measure window.

NOTE. If you choose a template

measurement, you will have to save the changed measurement under a new name.

3. Click Edit.

ents

44 PQA600C and PQASW User Manual

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ents

4. Right-click Vi Conﬁgure.

5. Edit the settings as necessary

to suit yo cropping and shift values of the test are in reference pixel units (use post brightness is in the units used for the view model. For example, if the outp input, the units are nits (candelas per square meter). But, if video is direct

Click Restore Defaults to return all settings to the initial factory values

ew Model and select

ur requirements. All

scale values). Offset

ut of a display model is

ly input, the units are LSBs.

6. Click

PQA600C and PQASW User Manual 45

OK to save your changes.

Making measurem

The following table lists the parameters that can be set in the View Model conﬁguration node.

Table 12: View model parameters

Parameter Setting Usage

Environment

Reference

Test

Optimize For:

Accu

Speed Select to use a simpler reconstruction ﬁlter that almost

ents

racy

Viewing Distance (Screen Heights) Specify the distance between the display and the

viewer in scr

een heights.

For compliance with BT.500 recommendations, use 5 screen heights for SD source material. For compliance

with BT.710-4, use 3 screen heights. The

PQA supports values up to 100.

Ambient Luminance (cd/m

) Specify the light level in the viewing area. Use 0 for a

dark room, use 1–3 for moderate lighting, and use a

00 for sunny conditions.

set the viewing distance and ambient

Match Ref

erence

setting >1

Select to luminance values to the values used by the reference environment.

Independent of Reference Select to set the test environment to different values

se used for the reference environment.

y the distance between the display and the

g Distance (Screen Heights)

Viewin

than tho

Specif viewer in screen heights.

For compliance with BT.500 recommendations, use5sc

reen heights for SD source material. For compliance with BT.710-4, use 3 screen heights. The PQA supports values up to 100.

Ambient Luminance (cd/m

) Specify the light level in the viewing area. Use 0 for a

oom, use 1–3 for moderate lighting, and use a

dark r setting >100 for sunny conditions.

Select to use a signiﬁcantly better reconstruction ﬁlter that keeps reconstruction artifacts below 11 bits.

ecting this setting effectively doubles the required

Sel time for video alignment (if it is used).

doubles alignment speed. Selecting this setting

sults in worst case resample artifacts that are about

re 60% accurate relative to the values achieved by the Accuracy setting (approximately 10-bit accuracy).

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Table 12: View model parameters (cont.)

Parameter Setting Usage

Default Spatial Alignment

Reference Crop (pixels and lines) Use to ignore border pixels, VITS, or other edge

components not of interest for measurement, or pixels and lines not included in the test video clip.

Test

Horizontal Scale and Shift

Vertical Scale and Shift

Crop (pixels) Use to ignore border pixels, VITS, or other edge

Luma Gain and Offset Select Auto to discount the differences in brightness

Speed of alignment measurement: The time required to perform an automatic spatial alignment is an exponential function of the Auto Search Range. For video sequences that are already spatially aligned, but need luminance gain and/or DC Offset correction, set the Auto Search Range to

minimum allowable range) for both dimensions. For small offsets relative to each respective non-active edge, small values can be used for

1% (the the auto search range that will result in substantial improvements in the time required to perform automatic spatial alignments.

Use to manually or automatically set the test video horizontal spatial registration to match the reference

video.

Use to manually or automatically set the test video vertical spatial registration to match the reference

video.

components not of interest for measurement, or pixels and lines not included in the reference video clip.

and contrast between video and displays in quality measurements.

ents

Changing the spatial alignment. You might need to change the spatial alignment between your test and reference

ﬁles to accommodate changes in the test ﬁle due to processing. Video ﬁles must be spatially aligned to get meaningful

video results.

To save time in successive measurements, auto-correction may be run once and then the measured values (cropping, horizontal and vertical scale, horizontal and vertical shift, luma gain, and offset brightness) can be saved as manual

ings. This allows the measurement of alignment correction values to be skipped with subsequent measurements,

sett saving substantial processing time.

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Perceptual Difference

The Perceptual Difference node includes the human vision model for quantifying perceptual sensitivities to the tested video, including differences (such as artifacts from codecs, noise or any visible difference of any kind) optionally relative to a reference, changes in perception due to changes in displays, viewing distances, and more. The output of this node is a Perceptual Difference Map in units of percent perceptual contrast. The Perceptual Difference node allows you to adjust parameters for viewer characteristic s (such as acuity, sensitivity to changes in average brightness, response speed to changing over time, scene changes, sensitivity to photosensitive epilepsy triggers, and more).

To change the Perceptual Difference parameters:

1. Right-click the M easure button.

2. Select the desired measurement

from the Conﬁgure Measure window.

NOTE. If you choose a template

measurement, you will have to save the changed measurement under a new name.

ents

3. Click Edit.

48 PQA600C and PQASW User Manual

4. Right-click Perceptual Difference and select Conﬁgure.

Making measurem

ents

5. Edit the se suit your requirements.

If the Typical or Expert viewer does not m can specify the parameters for a custom viewer.

6. Click Custom.

7. Type a name for the custom

viewer parameters in the Custom ﬁeld or select a previously created conﬁguration ﬁle from the drop-down list.

8. Click Edit to display the Edit Perception Viewer window.

ttings as necessary to

eet your needs, you

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ents

9. Edit the settin suit your requirements.

Click Restore Defaults to

return all settings to the initial factory value

Click Undo Ch

all settings to the previously saved values.

10. When you have completed making your change your changes.

gs as necessary to

anges to return

s, click OK to save

50 PQA600C and PQASW User Manual

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The following table describes the parameters that can be set in the Perceptual Difference conﬁguration node.

ents

NOTE. These ar

familiar with human vision science and have read the white paper “An Adaptable Human Vision Model for Subjective Video Quality Rating Prediction Among CIF, SD, HD, and E-Cinema” (located on the Documentation CD), which explains these parameters as

Table 13: Pe

Parameter Setting Usage

Acuity

e all expert user controls. To ensure accurate results, you should not change these settings unless you are

controls for various portions of the model.

rceptual difference parameters

Minimum Acuity: 0 (legally blind) to 1 (perfect, super-human acuity). This parameter spatial frequency response) in the darkest areas of the image.

Lum. Sensitivity: 0 (no adaptation) to

1.0 (hyper-sensitive). This parameter control with increases in local average luminance.

Area Adaptation: 0 (the entire visible area) t This parameter controls (surround spatial frequency) how large an area is int luminance used for the local luminance sensitivity adaptation. Larger values make a localized.

Adapt. Lum. Sens.: 0 (no adaptation) to 1.0 (hyper-sensitive). This parameter cont luminance sensitivity to the area integration adaptation. Large values acc adaptation to luminance.

Variance Sens.: 0 (no adaptation) to

1.0 (hyper-sensitive). This parameter ntrols how the acuity changes from

co a stimulus of threshold contrast to supra-threshold contrast. Higher values

rrespond to bigger differences in acuity

co for low contrast versus high contrast stimuli.

controls the acuity (center

s how the local acuity increases

o 1.0 (smallest resolved area).

egrated to determine the local

daptation to luminance more

rols the (surround spatial frequency)

elerate the localization of the acuity

The default value is 0.38, which is appropriate for “average” viewers. Use

0.45 for ex controls the Tektronix Human Vision Model. Start with the default value and move towa your requirements.

The default value is 0.003. Start with the default value and move toward the extreme

The default value is 0.115, which is for “avera viewers. Start with the default value and move toward the extreme values to suit your r

The default value is 0.003. Start with the default value and move toward the extr

The default value is 0.6. Start with the default value and move toward the

treme values to suit your requirements.

pert viewers. This parameter

rd the extreme values to suit

values to suit your requirements.

ge” viewers. Use 0.2 for expert

equirements.

eme values to suit your requirements.

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Table 13: Perceptual difference parameters (cont.)

Parameter Setting Usage

Speed

ents

Minimum Speed: 0 (extremely slow) to

1.0 (instant response / zero response time). This parameter controls the speed of visual response in darkness.

Lum. Sensitivity: 0 (always as slow as in darkness) to 1.0 (fast even for slightly lighter than darkness). This parameter controls how much response time decreases with increase in average local luminance.

Adaptation Speed: 0 (virtually no speed adaptation to local luminance) to 1.0 (instantaneous speed adaptation to local luminance). This parameter controls how quickly response time changes to local luminance.

Adapt. Lum. Sens.: This parameter controls temporal integration used for determining the local luminance value to which speed adapts. Use 0 for static and

1.0 for extreme photosensitive epilepsy.

Variance Sens.: 0 (no adaptation) to

1.0 (hyper-sensitive). T his parameter controls how the response speed changes from a stimulus of threshold contrast to supra-threshold contrast. Higher values correspond to bigger differences in response speed for low contrast versus high contrast stimuli.

The default value is 0.5. Start with the default value and move toward the extreme values to suit your requirements.

The default value is 0. Start with the default value and move toward the extreme value to suit your requirements.

The default value is 0.25. Start with the default value and move toward the extreme values to suit your requirements.

The default value is 0.0001. Start with the default value and move toward the extreme values to suit your requirements.

The default value is 0. Start with the default value and move toward the extreme value to suit your requirements.

52 PQA600C and PQASW User Manual

Table 13: Perceptual difference parameters (cont.)

Parameter Setting Usage

Masking

Overall Sensitivity Gain: This parameter sets the overall

Noise Masking: This parameter sets the baseline threshold of perception (1 JND) for the highest sensitivities.

Local Lum. Sensitivity: This parameter sets sensitivity to changes in luminance (for example, between reference and test).

Local Lum. Mask: This parameter controls how much luminance masks (or simple Weber's Law) compared to other masking.

Local Similarity: This parameter controls how much masking is due to local image pattern similarities.

Sim Localization: This parameter speciﬁes the localization of similarity masking. For example, 0 is used for no localization and 1 is used for 100% localization of masking due to local similarity.

Variance Masking: This is a local complexity masking control.

Area Threshold: This parameter controls the support region area for variance masking by clipping regions below a threshold.

Area Integration: This parameter controls the localization of variance masking: use 0 for no localization and use 1 for 100% localization.

sensitivity.

The default value is 0.025, which is appropriate for “average” viewers. Use

0.0126 for expert viewers. Start with the default value and move toward the extreme values to suit your requirements.

The default value is 0.1. Start with the default value and move toward the extreme values to suit your requirements.

The default value is 9000. Start with the default value and move toward the extreme values to suit your requirements.

The default value is 0.9. Start with the default value and move toward the extreme values to suit your requirements.

The default value is 0.003. Start with the default value and move toward the extreme values to suit your requirements.

The default value is 0.000075. Start with the default value and move toward the extreme values to suit your requirements.

The default value is 0.04. Start with the default value and move toward the extreme values to suit your requirements.

The default value is 50. Start with the default value and move toward the extreme values to suit your requirements.

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PSNR

The PSNR conﬁguration node does not contain any parameters. The node is present so that the PSNR result can be added to a measurement. A measurement can include either PSNR or Perceptual Difference, but not both.

PSNR is calculated on a frame-by-frame basis using the following equation from the ATIS Technical Report T1.TR.74–2001.

PSNR is calculated on a sequence basis using the following equation from the ATIS Technical Report T1.TR.74–2001.

ents

54 PQA600C and PQASW User Manual

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Artifact Detection

The Artifact Detection conﬁguration node allows you to specify parameters that control the measurement of spatial artifacts. There are two mutually exclusive artifact detection measurements that can be performed at any one time:

Spatial Gradient Artifacts

DC Blockiness Artifacts

The chosen measurement can be used to weight any upstream measurement result by using a cross-fade between the input result map and a 100% artifact weighted result using the "Overall Artifact Weighting" control. A setting of 0 is equivalent to eliminating artifact detection (as if the node did not exist in the processing chain), and a setting of 100% gives full artifact weighting. Full artifact weighting ﬁlters the previous map, for example PSNR or perceptual contrast such that areas with no artifact are 0 and areas with 100% artifact are passed unchanged.

Spatial gradient artifacts. The three classes of spatial gradient-related artifacts measured are:

Reduction in gradient magnitude at each point (% Lost Edges, usually associated with blurring).

Increase in gradient magnitude at each point (% added edges, u sually associated with ringing, mosquito noise, and

similar ar

tifacts).

ents

Rotated g

Gradient the largest magnitude and corresponding sign. Thus, edges are classiﬁed into one of eight possible gradient directions: up, down, right, left, 45°, 135°, –45°, and –135°. If the direction changes from diagonal to vertical or horizontal, a rotated edge artifac

The weig however, that measurement values for added and lost edges are complimentary; if 100% lost edges are measured, zero added measures will measured.

The Produce complimentary data setting produces a one's compliment of the normalized-to-one result map before being applie selected. If this setting is chosen, areas without the enabled artifacts are bright in the results map and a perfect (no detected artifact) result is 100% when no upstream node is present, or there is no change for PNSR. For DMOS, artifact weighting i s

ed as an annoyance weighting. For example, rotated edges of jaggies can be treated as more annoying than blurring

treat by giving the corresponding weights to each.

radient orientations (% rotated edges, usually associated with blocking).

s are measured by applying vertical, horizontal, and diagonal 3 x 3 edge ﬁlters and classifying outputs according to

t associated with jaggies is detected.

hting for Lost, Added Edges and Rotated Edges is relative: the total is internally normalized to 100%. Note

d to the input result map, if any. U se this setting to measure, for example, DMOS due to artifacts other than those

DC blockiness artifacts. This measurement attempts to ﬁnd a blocking grid structure and then, for full reference (dual

ended) measurements, measures the difference between each pixel and the mean value within the block in which the pixel resides, normalized by the corresponding difference in the reference video. If all pixel values are equal to the block mean in the test, but corresponding pixels in the reference are not equal to the block mean, the measurement result is 100% DC Blockiness.

The denominator can be zero, in which case, the contributing pixel term is zero. Thus, images formed of only DC blocks might have less than 100% results. For example, ﬂat (no detail) areas of the reference and test image that occupy a block will all be zero. However, for detailed areas of the reference video, DC blocked test video will measure very close to 100% DC Blockiness.

In addition to these measurements, when used with other measurements such as DMOS, selecting all edge artifacts and “produce complimentary data” gives weight to perceptible differences not due to edge differences. This includes perceptible differences due to noise and other types of artifacts that are not included in these three edge difference classes.

PQA600C and PQASW User Manual 55

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To c o nﬁgure the Artifact Detection parameters:

ents

1. Right-click th

2. Select the de

e Measure button.

sired measurement from the Conﬁgure Measure window.

NOTE. If you c

hoose a template measurement, you will have to save the changed measurement under a new name.

3. Click Edit.

56 PQA600C and PQASW User Manual

4. Right-click Artifact Detection in the Process Workﬂow area and select Conﬁgu

re.

Making measurem

ents

5. Edit the se suit your requirements.

6. Click OK to save your changes.

ttings as necessary to

Select or deselect the Enable

check box to determine whether t artifact is detected in the measurement.

Adjust the value next to each

artifac much importance is given to the associated artifact.

he associated

t type to specify how

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The following table lists the parameters that can be set in the Attention Model conﬁguration node.

Table 14: Artifact detection parameters

Parameter Setting Usage

Spatial Gradi

ents

ent Artifacts

% Lost Edges (B

% Added Edges (Ringing) Added Edges refers to a transition (an

% Rotated Edges (Blocking) An example of a rotated edge is a

Produce complimentary data In a sense, this setting inverts the results

lurring)

Lost Edges ref edge) that occurs over a greater distance (or disappears). Lost Edges occur when the brightne pixel is less than expected from the reference. Enable this setting to weight the importa measurement.

edge) that appears where there wasn't an edge bef when the brightness difference from pixel to pixel is greater than expected from the referenc the importance of Added Edges in your measurement.

diagona becomes a "jaggy" staircase of horizontal and vertical edges in the test image. In this cas rotated to horizontal and vertical edges. In more complex im ages , the net effect is that block-like artifacts. Enable this setting to weight the importance of Rotated Edges

r measurement.

in you

ifact weighting. For example,

of art to know how much of the difference between the test and reference is not

ibuted to edge changes (noise is an

attr example), select all three edge artifacts and then select this setting.

ers to a transition (an

ss difference from pixel to

nce of Lost Edges in your

ore. Added Edges appear

e. Enable this setting to weight

l edge in a reference image that

e, the diagonal edges have been

the image has rectangular or

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Table 14: Artifact detection parameters (cont.)

Parameter Setting Usage

DC Blockiness Artifacts % DC Blockiness This measurement scans for loss of

variance (detail of all kinds, not just edges) within each image block. 100% DC blockiness means that the image only has the “DC” or average value and has lost all other information. 0% means it has lost nothing. This measurement is useful for MPEG-2 codec testing where lowering bit rates eventually results in 100% DC blockiness.

Overall Artifact Weighting

Range: 0–100 This setting is used with other

measurements as a cross-fade weighting. In other words, if 100% is used here, it serves as a hard ﬁlter to mask the measurement map upstream (perceptual difference or PSNR objective difference) where there are no artifacts detected (unless complimentary data is selected, in which case it does the opposite). Thus, the resulting measurement represents the portion of the relative PQR, DMOS or PSNR that is due to the selected artifacts. However, if 50% is used, it allows 50% of the non-artifact weighted map to go through. This is useful when annoyance weighting is desired in a measurement.

ents

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Attention Model

The Attention Model conﬁguration node allows you to specify how attention (attraction) is measured and specify the weighting for selected characteristics.

To c o nﬁgure the Attention parameters:

1. Right-click the M easure button.

2. Select the desired measurement

from the Conﬁgure Measure window.

NOTE. If you choose a template

measurement, you will have to save the changed measurement under a new name.

3. Click Edit.

ents

60 PQA600C and PQASW User Manual

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ents

4. Right-click At select Conﬁgure.

5. Edit the settings as necessary to suit your requirements.

tention Model and

If the Typical conﬁguration does not

ur needs, you can specify

meet yo the parameters to create a custom attention model.

6. Click Custom.

7. Type a name for the custom

tion model parameters in the

atten Custom ﬁeld or select a previously created conﬁguration ﬁle from the

-down list.

drop

k Edit to display the Edit

8. Clic Attention window.

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ents

9. Edit the settin suit your requirements.

Select or deselect the check

box next to a setting to determine whe setting is included in the measurement.

Click Restore Defaults to

return all se factory values.

Click Undo Changes to return

all settings to the previously saved value

10. Click OK to

gs as necessary to

ttings to the initial

save your changes.

ther not the

How Attention Weighting is used

Attention Weighting controls the cross fade between the attention probability weighted upstream map and the unweighted

am map. Measurements that include the perceptual difference node, such as Predicted DMOS, apply attention

upstre weighting differently than objective measurements such as PSNR or Artifact D etection. For Artifact Detection and PSNR, the attention probability density map is used directly to attenuate the resulting upstream map. For DMOS, the attention map is

lized such that the perceptual difference map may be both increased and attenuated according to attention probability.

norma

jective measurements, attention weighting produces the portion of objective measurement where people are most

For ob likely to look. For DMOS, the attention weighting effectively excludes areas where people do not look from the measurement, giving a measurement of predicted DMOS primarily using the areas of interest. This m eans that ADMOS with 100% Attention

hting will have lower results than those set at 0%, if the areas of highest attention are less distorted than areas where

Weig people do not look and vice versa; ADMOS with 100% attention weighting will have higher results than those set at 0% if areas of highest attention are more distorted than areas where people don't look.

62 PQA600C and PQASW User Manual

The following table lists the parameters that can be set in the Attention Model conﬁguration node.

Table 15: Attention model parameters

Parameter Setting Usage

Feature Weights Motion

Spatial Wei

Distraction Weights

ghts

Center This settin

People

Foregrou

Contrast This setting speciﬁes how important

Color This setting sets the importance of color

Shape

Siz

fferences: Weights distractions

Di outside the probable focus of attention. Distractions include artifacts, large

ifferences between reference and test,

d or other things that might make someone look at an area normally not of interest

n program material.

This parameter accounts for the viewer's interest in m correlate with a greater interest in moving objects. If this parameter is not enabled, object moti

the center of the screen.

This parameter signiﬁes the importance of people in the video. People are detected t detection.

In the Tek are associated with the center and with the edges. The objects that are not asso considered background.

contrast is. If a heavily airbrushed, faded image i image, people tend to look at the high-contrast image. This setting contro happen in a particular application.

in the image. A higher value for this sett highly saturated colors over the generally more dull grays.

When this setting is emphasized, s imple, long and thin shapes are tracked more tha

Thi large objects in the image, because large objects tend to draw more attention in an

age.

Th image where viewers place their center of vision. Distraction w eighting allows

he upstream measurement maps (such

t as perceptual difference, PSNR, and artifact detection) to be used to deﬁne

dditional attention sources. The settings

a for the parameters in the upstream measurement maps are controlled in the conﬁguration nodes of the associated measurement maps.

on is ignored.

g speciﬁes the importance of

hrough skin and object shape

tronix Attention Model, objects

ciated with the center are

s placed next to a high-contrast

ls how much this is expected to

ing represents greater attention to

n complex blobs.

s setting considers the presence of

e focus of attention is the point in an

Making measurem

otion. Higher values

ents

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The default values for the Attention Model parameters are shown in the following table.

Table 16: Attention model default parameters

Parameter Setting Default value

Feature Weights Motion 66.66

Spatial Weights

Distraction Weights

ents

Center

People 17.2

Foreground 17.6

Contrast

Color

Shape

Size

Differences

19.3

12.1

11.4

9.4

100

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Summary Node

The Summary Node speciﬁes how results are reported. You can specify statistical units for measurements, whether results are saved and how they are saved, display characteristics of the map, and levels for warnings and errors.

1. Right-click the Measure button.

2. Select the desired measurement

from the Conﬁgure Measure window.

NOTE. If you choose a template

measurement, you will have to save the changed measurement under a new name.

3. Click Edit.

ents

PQA600C and PQASW User Manual 65

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4. Right-click Summary Node and select Conﬁgure.

ents

5. Edit the se

ttings as necessary to

suit your requirements.

The PSNR and Perceptual

Differen

ce settings are mutually

exclusive. Only one setting will be accessible at a time, as determined by the co

6. Click OK

re measurement node.

to save your changes.

66 PQA600C and PQASW User Manual

The following table describes the parameters that can be set in the S ummary Node conﬁguration node.

Table 17: Summary node parameters

Parameter Setting Description Usage

Statistical U

nits

PSNR Units

Mean Absolute LSBs

dB Units

Sets PSNR res map units. Only selectable when measuring PSNR. This is a non-sta measurement, but is useful for some diagnostics. For example, ma where small differences between large results are of interest.

Sets PSNR r esults units to dB. Only sele PSNR. This is the standard unit of measurement for PSNR and is equivale of reference-test pixels in LSB units. Measured in dB referenced to peak w

ults units to

ndard PSNR

p units would useful

ctable when measuring

nt to the RMS difference

hite (also in LSB units).

Selecting th of interest to some encoder designers and evaluators or other engineers i mechanics of distortions.

This is the standard unit for PSNR.

Making measurem

is setting might be

nterested in detailed

ents

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Table 17: Summary node parameters (cont.)

Parameter Setting Description Usage

Perceptual Difference

ents

% Perceptual Contrast

DMOS Units Sets the units used in the graph

PQR Units Sets the units used in the graph

Sets the units used in the graph display to % Perceptual Contrast when the Perceptual Difference node is part of the measurement. Percent perceptual contrast is the unit of the perceptual difference map. Percent perceptual contrast of 100% is the maximum possible (except under transient conditions) and 0.1% corresponds to nominal threshold.

display to DMOS Units when the Perceptual Difference node is part of the measurement. Predicted DMOS quantiﬁes video differences above one JND (Just Noticeable Difference) consistent with human ratings (see ITU-T BT.500 Worst Case Training Sequence Response later in this table).

display to P QR Units when the Perceptual Difference node is part of the measurement. PQR stands for Picture Quality Rating. One PQR unit corresponds to one JND (Just Noticeable Difference).

Perceptual contrast units can be useful in:

Making reduced reference measurements to compare total perceptual contrast of a reference (one number) to the test (which is measured in single-ended mode, remotely).

Determining legibility against viewing distance.

DMOS units would be an appropriate choice for units when a low to relatively high quality range is expected and you are interested in average quality ratings because the test video is expected to be noticeably different than the reference.

PQR units would be an appropriate choice for units when:

An excellent quality level is expected and you are interested in determining if any difference can be seen between the test and reference. Values above 1 are not as valid as DMOS for quantifying this difference.

You want to compare results with legacy Tektronix measurements.

68 PQA600C and PQASW User Manual

Table 17: Summary node parameters (cont.)

Parameter Setting Description Usage

Artifact Units

Percent Maximum Artifact

dB Units

Sets the units used in the graph display to Percent Max A rtifact when Artifact Detection is the measurement. For example, if the artifact detection selected is DC Blockiness, an output of 100% corresponds to the entire image block being a constant ("DC") value, whereas 0% corresponds to no change from the reference.

Sets the units used in the graph display to dB Units when the Artifact Detection node is part of the measurement.

Percent Maximum Artifact is often more useful if distortion is larger, for example, more than 5%.

dB is usually useful under conditions of moderate distortion (less than 5%).

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Table 17: Summary node parameters (cont.)

Parameter Setting Description Usage

Save Results

ents

None When selected, no measure map

or measurement values are saved to disk when the measurement is completed.

Maps & Values

Map Overwrite

Values Only

Value Overwrite

When selected, both the measure map and measurement values are saved to disk when the measurement is completed. The map and results ﬁlenames are incremented by one (ﬁle1, ﬁle2, ﬁle3), for each subsequent run of the measurement.

When selected, both the measure map and measurement values are saved to disk when the measurement is completed. The map and results ﬁles are overwritten for all subsequent runs of the measurement.

When selected, only measurement values are s aved to disk when the measurement is completed. The results ﬁle name is incremented by one (ﬁle1, ﬁle2, ﬁle3), for each subsequent run of the measurement.

When selected, only measurement values are s aved to disk when the measurement is completed. The results ﬁle is overwritten for all subsequent runs of the measurement.

Use this setting to conserve disk space and time managing results. If you saved results of previous tests for comparison, selecting this setting enables you to quickly run tests and make comparisons without ﬁlling the disk with temporary results that will have to be manually deleted at some point.

Select this setting to maintain a full history of tests.

Use this setting to conserve disk space and time managing results. Also, when you are using scripts, you can run a set of tests, check results, adjust the video or measurement settings and rerun the same test with the intent of throwing out the ﬁrst results. This saves time in managing ﬁle storage.

Use this setting to load measurement results into your own spreadsheet for analysis or into the Graph View for later analysis. Results maps are not saved, thereby signiﬁcantly reducing use of disk space.

This setting is useful when you are using scripts; you can run a set of tests, check results, adjust the video or measurement settings, and rerun the same test with the intent of throwing out the ﬁrst results. This saves time in managing ﬁle storage.

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Table 17: Summary node parameters (cont.)

Parameter Setting Description Usage

Measure Map Display

Gain Change to adjust the brightness

level of the results map. This is useful when optimum contrast for the test and reference video is different from that of the results map.

Offset Change to shift the baseline of

the results map. This parameter can be used in combination with Gain to enhance relatively minor differences in the measure map. This is useful when the optimum reference and test video brightness setting on the display are different from the optimum brightness setting for the results map.

Display as Signed Data

When this option is not selected, results map pixels have intensity proportional to the absolute value of the measurement being made. So for example, for PSNR, brighter pixels correspond to larger differences, both positive and negative differences, between the test and reference. However, when this option is selected, the sign is retained at each pixel so that when a positive offset (see Measure Map Display Offset above) is added, no difference is gray, with positive differences being brighter and negative differences being darker.

Use this setting to adjust the contrast in the results map. This does not affect measurement results (such as graphs and summary numbers), only the results map display.

Use this setting to control the brightness in the results map. This setting does not affect measurement results (such as graphs and summary numbers), only the results map display.

In normal use, the results map displays the magnitude of difference between the reference and tes t. Use this setting to make the measure map show the difference between positive and negative values.

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Table 17: Summary node parameters (cont.)

Parameter Setting Description Usage

Event Log

ITU-T BT.500 Worst Case Training Sequence Response

ents

Warning Level

Error Level

Import

Sets the green-to-yellow transition point on the indicator bar in the Graph portion of the display.

Sets the yellow-to-red transition point on the indicator bar in the Graph portion of the display.

Used to import the % Perceptual Contrast Difference Minkowski result from a previously run test. This corresponds to the ITU BT.500 worst case training procedure.

Adjust this value to shift the warning transition point.

This button is selected to calibrate a given DMOS measurement. First, the DMOS measurement is run using a worst case video sequence. Then the measurement is edited, this "Import" button is pressed, and the DMOS results are selected, thereby importing the Minkowski metric of the perceptual contrast difference (which represents the training result).

settings are saved with the test results, a nd are used during the measurement and during the review of saved results. (See

These page 210, How to adjust the Measure Map display.)

72 PQA600C and PQASW User Manual

Importing measures

You can add measures that were created on another PQA into your PQA by using the Import Measures function. The Import Measures function works by reading a conﬁguration (.cfg) ﬁle, which is the ﬁle that contains all measure deﬁnitions. PQA measure deﬁnitions are saved in a ﬁle named Measures.cfg. This ﬁle is a binary ﬁle and cannot be edited.

NOTE. Importing measures from another PQA will not remove the factory deﬁned measures, numbered 001 through 038.

Importing measures only adds user-deﬁned measures.

To import a measure from another PQA:

1. Make a copy of the Measures.cfg

ﬁle in the C:\Program Files (x86)\Tektronix\PQA (Windows 7) or C:\Program Files\Tektronix\PQA (Windows XP) directory of the source PQA (the instrument you are importing from).

NOTE. If the source PQA can be

accessed across a network, you can skip ahead to step 3.

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2. Copy the copied Measures.cfg ﬁle

into a directory on the PQA on which you want to add the measure (the destination instrument).

3. Select File > Import Measures.

This displays the Import Measures Conﬁguration dialog box.

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4. Click Browse. This opens a dialog you can use to select the .cfg ﬁle youwanttoimp

ents

ort.

5. Select the .cf the measure you want to import and click Open.

6. Select how you want the user deﬁned me

Select A measures to add measures to your machine without replacing measure created,

Select Replace existing user

deﬁned measures with new measur

user-deﬁned measures in your instrument with the user-deﬁned measu

g ﬁle that contains

asures to be imported.

ppend to existing

s you have already

es to replace all the

res in the imported .cfg ﬁle.

7. Click

8. Click Close to remov e the Import

74 PQA600C and PQASW User Manual

Import to load the new

measures.

Measure dialog or click Conﬁgure

ure to display the Conﬁgure

Meas

Measure window.

Video ﬁle formats supported for measurements

The PQA600C and PQASW recognize the following ﬁle formats for taking measurements. All formats are 8-bits resolution except .v210 and .vcap10 ﬁles. Measurements on the .v210 and .vcap10 ﬁle formats are made only on the 8 most signiﬁcant bits.

Supported uncompressed video ﬁle formats

File format File extension Frame structure options

CbYCrY (601-4:2:2), UYVY

YCbYCr (4:2:2), YUY2

YCbCr 4:2:0

YCbCr 4:2:0 (10-bit, LSB

ﬁrst)

YCbCr 4:2:0 (10-bit, MSB

ﬁrst)

CbYCrY 4:2:2 (601-4:2:2),

.yuv

v210 Non-Interlaced

UYVY (10-bit)

YUV 4:4:4

BGR

ARIB YUV

AVI (Uncompressed UYVY,

.yuv

.rgb Non-Interlaced, Field 1 First, Field 2 First, Planar .yyy

.avi Not applicable

YUY2, RGB, v210)

Vcap 8-bit (Captured by

.vcap

optional SDI card.)

Vcap 10-bit (Captured by

.vcap10 Not applicable

optional SDI card.)

YCbCr 4:2:0 10-bit format is supported only for .yuv ﬁles created by MTS4EA which are encoded with one of the “two byte LSB/MSB ﬁrst” options.

The

Non-Interlaced, Field 1 First, Field 2 First, Planar

Planar only

Non-Interlaced, Field 1 First, Field 2 First, Planar

Not applicable

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Table 18: Supported elementary stream video ﬁle formats

File Format Description

H.264/AVC/MPEG-4 Part 1 0 Baseline, Extended, Main, High 10, High 4:2:2, and High 4:4:4 proﬁles a ll levels

MPEG-2 Main Proﬁle a

VC-1 All proﬁles, all levels

MPEG-4 Part 2, Proﬁle at Level 0–5 Simple Proﬁle at Levels 0-5 and Advanced Simple

H.263 Base

ents

1to5:1

t Main, High, and High 1440 levels, 4:2:2 Proﬁle at Main and

High Levels

line

Table 19: S

File Forma

MPEG-2 Tr gram Stream

MP4 Parts

ASF .asf, .wmv Microsoft proprietary video container format

3GPP

DVD VOB

QuickTime

upported system layer video ﬁle formats

ansport/Pro-

1, 12, and 15

File exten

.ts, .mpg

.mp4

.3gp

.vob .mov

sion

, .mpeg, .ps

Descripti

MPEG-2 mu

MPEG-4 multimedia container format

Multimedia container format deﬁned by Third Generation Partnership Project (#GPP)

DVD video object ﬁle

Apple QuickTime

ltimedia container format

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When you select a ﬁle format that is headerless (yuv or rgb), the PQA will prompt you to specify the ﬁle form at (width, height, frame r

ate, frame s tructure, and format).

ents

Use the follow

If the selecte

ing guidelines for specifying the ﬁle format:

d ﬁle is in interlaced format and the line c onstruction matches #1 in the following ﬁgure, select “Field 1

First” for Frame Structure.

If the selected ﬁle is in interlaced format and the line construction matches #2, select “Field 2 First” for Frame Structure.

If the selected ﬁle is interlaced scanning and it has a de-interlaced format like #3, select “No_Interlace”.

If the selected ﬁle has the progressive scanning like #4, select “No_Interlace”.

If the selec ted ﬁle has the 4:2:0 planar format like #5, select “No_Interlace” and “YCbCr 4:2:0 (Planar Only)” at

Sample format selection.

The interlaced video content is supposed to be “Top ﬁeld ﬁrst”.

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How to take a measurement (Option BAS and Option ADV only)

Keep the following points in mind when taking a measurement:

When .rgb or AVI_RGB format ﬁles are used for the reference or test video sequence, the PQA converts to ﬁles to the YUV format internally (with a CCIR 601 color matrix) before starting the measurement.

When the measurement has the Display Model node set to Interlaced CRT, the PQ A expects the ﬁle video format is "Top Field First".

The results of measurements performed on ﬁles stored in RA M are stored only in RAM at the following location: C:/ProgramData/Tektronix/PQA /RAM_Results. This directory is automatically mapped to the navigation pane in 64-bit systems.

Perform the following steps to take a measurement:

1. Acquire or store two “yuv” format ﬁles that you want to time align and compare to each other.

2. From the Menu bar, select Conﬁgure > Measure.This

opens the Conﬁgure Measure dialog box.

3. Select a Measure from the Measures list.

78 PQA600C and PQASW User Manual

4. In the Reference box, click

Browse Disk or Browse Memory.

5. Select the reference ﬁle to be used

for the measurement.

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If you select a compressed video ﬁle for the reference ﬁle, the PQA auto ﬁle to YUV format before the measurement is executed.

After converting the compressed ﬁle to YUV format, the PQA displa window. If a compressed video ﬁle contains multiple programs, you must s to use for the measurement.

matically converts the

ys the Stream Selection

elect the program you want

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6. Click the + symbol next to the program you want to take the measurement o within the program and click OK.

After you select the ﬁle, the PQA converts i saves it in the same directory as the selected reference ﬁle.

7. If you chose an uncompressed ﬁle as the Ref dialog. In the Set Reference File Format dialog, enter the values appropr

ents

n. Select the video

t to YUV format and

erence, you will see this

iate for the ﬁle.

8. Click OK

9. In the Test box, click Browse Disk

or Bro

wse Memory.

80 PQA600C and PQASW User Manual

Tektronix Video Tektronix Video PQA600C Manual

Specifications and Main Features

Frequently Asked Questions

User Manual