Barco RHDM-2301 User Manual

RHDM-2301

22.5" - LCD Broadcast Monitor

User manual

K5960012-02

Intentionally left blank

2 ______________________________________________________Barco - RHDM-2301 - User manual

1 Introduction

1.1 Customer notice

Thank you for buying Barco!

Barco is a world leader in display and visualization solutions. We are convinced that you
will enjoy our products.

1.2 Change record

Revision Date Description

00 November 2008 Initial release

01 September 2009 Update for software V3.00

02 January 2010 Update for software V3.01

Introduction

Barco - RHDM-2301 - User manual _____________________________________________________ 3

Introduction

1.3 Contents of the user manual

1.3.1 Introductory notes on the content

The user manual is divided in different sections. The sections that are relevant to the
reader may depend on the readers’ experience level.

Get an image on the screen in 5 minutes: After reading the important notices and
safety introduction in the chapter “Introduction”, the information provided in the chapter
“First operation” will guide the user through the process of switching on and viewing an
input signal on the display unit.

First reconnaissance with the display unit: A chronological reading of the user
manual is probably the most satisfying way for users who have not used the display unit
before. Especially the chapter “First operation” and the chapter “How to” will give the
user a good feel for the basic operations and the capabilities of the display unit.

Finding out “how to” perform a frequently used operation: A dedicated chapter
“How to” is made for the most frequent operations the user would like to execute. It will
help the user to solve the question quickly, since it is built up as a non chronological
guide.

Basic knowledge of the display unit, expert question: The chapter “full functionality
description” contains all there is to know about the display unit. The information is

ordered in a chronological way.
Technical details: Check the “Addendum” for detailed and technical information on the

display unit.
Trough-out the manual, the reader may wonder about the use of a specific term. The

frequently used terms are gathered in the chapter “Terminology” for the readers’
convenience.

4 ______________________________________________________Barco - RHDM-2301 - User manual

1.3.2 Structure of the user manual

Chapter 1: Introduction

The introduction contains all general information related to the product, including “About
the product”, “Important notices” and “Safety precautions”.

Chapter 2: First operation

The basic operations of the display unit are explained in this chapter.

Chapter 3: How to

Frequently used procedures and/or features are described in this chapter. This is a good
place to start for users who want to learn how the basic controls work.

Chapter 4: Full functionality description

All options and possibilities are listed in this chapter. This is an extensive and complete
list of all features.

Chapter 5: Video signal processing

Describes details related to the video signal processing of the display unit.

Chapter 6: Terminology

The terminology used in this manual is explained in detail in this chapter. This allows the
beginner and the expert to fall back on a consistent naming convention used throughout
this manual.

Chapter 7: Addendum

The Addendum is quite extensive and includes the more technical parts of information
that are useful for system integrators and people who want to know more about the
technical specifications of the display unit.

Chapter 8: List of abbreviations

Chapter 9: Table of contents, list of figures and list of tables

Introduction

Barco - RHDM-2301 - User manual _____________________________________________________ 5

Introduction

1.4 About the product

The RHDM-2301 is a reliable grade-1 reference monitor for color critical applications in
the broadcast and post-production markets, such as:

• camera control

• program and distribution monitoring

• signal QA (Quality Assurance)

• technical room

• color grading

• DI (Digital Intermediate)

The RHDM-2301 reference monitor brings value of trusted reference colors, no calibration
maintenance for a long period, and image quality comparable to CRT.

On top of that, the user-friendly interface and ease of use are unparalleled in similar LCD
monitors.

On the feature level, the color accuracy and stability with time and temperature, perfect
grey scale representation, deep and correct blacks, motion handling with scanning
backlights and a myriad of other features give large benefits to professionals active in
these markets.

The Key features of the display unit are:

LCD panel

• 22.5” (57cm) diagonal

• 1920x1200, 1920x1080 active area

• 10 bit panel

• Typical contrast 800:1

• Zero perceptible bright pixels: Barco guarantees the delivery of a RHDM-2301 mon­itor equipped with an LCD panel selected for zero perceptible bright pixels at ergo­nomic viewing distances. A bright subpixel (red, green or blue) is counted as a
defect when it is visible on a grey level 544/1023 and the bright defect is more than
33% of the subpixel area.

Optical properties

• Wide gamut LED backlight

Processing of input signals

• 48 bit color processing (16 bit per color)

• 96-120 Hz native LCD driving

• Genlock and frame sync

• Quantified latency

• Scanning backlight functionality

Calibration and stability

• Compliant with following color standards:

 EBU 3213
 SMPTE C
 ITU BT.709
 xvYCC
 sRGB

6 ______________________________________________________Barco - RHDM-2301 - User manual

• Selection of different opto-electric transfer functions (‘gamma’)

 Rec.709
 xvYCC
 Pure gamma
 Extended gamma
 sRGB
 SMPTE 240M

• Factory cross-talk calibration

• Thermal sensor circuit for LED stabilization with temperature

• Embedded spectrometer for overall color stabilization over time

• Embedded special sensors for LED uniformity and color stabilization over time

• Front sensor for stabilization of LCD

Modular input configuration (4 slots)

• Slot 1 - 1 SDI input board (standard)

• Slot 2 – 1 SDI input board (optional)

• Slot 3 – future option

• Slot 4 – future option

SDI module specifications

• Possible inputs:

 2 x SDSDI
 2 x HDSDI
 2 x 3Gb/s (option)
 Combination of 2 signals out of: SDSDI, HDSDI or 3Gb/s (option)
 1 Dual Link (option)

• Outputs: 2 loop-through outputs

Control

• Detachable control panel with main functions and hot keys

• Ethernet interface with web server

Introduction

• RS485 serial and parallel control or Tally/UMD

• USB: host, peripheral and support of mass storage devices, mouse, etc…

Feature packs and options

• The RHDM-2301 comes in different flavors. Depending on the specific applications
that are targeted by the user, different feature packs can be selected. Depending on
the feature pack, additional options can be available.

• Broadcast – RHDM-2301/B: standard feature pack

 Accepts SD and HD-SDI timings (2 inputs with loop-through outputs)
 Selectable color space (EBU, SMPTE C, Rec.709 and Native), color tempera-

ture and gamma

 Configurable aspect ratio and safe area markers
 Standard controls (picture, background, saturation, hue, color channel selec-

tion, monochrome, input selection, aspect ratio and picture size, interlace
mode)

Barco - RHDM-2301 - User manual _____________________________________________________ 7

Introduction

• Post production – RHDM-2301/P has all features of the B version plus:

 Custom R, G, B primaries (in x,y)
 Accepts Dual Link HD-SDI timings
 Accepts 3Gb/s SDI timings

8 ______________________________________________________Barco - RHDM-2301 - User manual

1.5 Read carefully

Introduction

IMPORTANT

Please read the important notices and safety precautions, mentioned in the following paragraphs, care­fully. They provide essential juridical and technical information about the purchased product.

:

1.6 Important notice

1.6.1 Notation convention

Following notations are applicable to this manual and should be respected throughout the
manual.

WARNING

Warnings – presented in this manual, provide information, which if not adhered to, may result in
personal injury or death.

CAUTION

Cautions – presented in this manual, provide information, which if not adhered to, may result in dam­age to the equipment.

:

:

NOTE

:

Notes – presented in this manual, provide information, which emphasize points, significant to
understand and operate the unit.

IMPORTANT

Important – presented in this manual, provide information, which is important to highlight.

:

1.6.2 Copyright

© Barco n.v., All rights reserved.
The information contained herein is Barco confidential information. No part of the

information contained herein may be disclosed outside of the organization of the
recipient, its sub-contractors, and customers in any form or by any means and/or stored
in a database or retrieval system without the prior written consent of Barco.

1.6.3 Technical accuracy notice

Although every attempt has been made to achieve technical accuracy in this document,
we assume no responsibility for errors that may be found. Our goal is to provide you with
the most accurate and usable documentation possible; if you discover errors, please let
us know.

Barco - RHDM-2301 - User manual _____________________________________________________ 9

Introduction

1.6.4 Technical specifications notice

The technical specifications mentioned in this manual shall under no circumstances be
used as proof or item of evidence.

Only the technical specifications defined in the Barco technical specifications document
(which is not part of this manual) can be used as a base for contract negotiations.

1.6.5 Federal Communication Commission (FCC) notice

This equipment has been tested and found to comply with the limits of an FCC class (refer
to the technical specifications of the specific unit for more details about the corresponding
class). These limits are designed to provide reasonable protection against harmful
interference when the equipment is operated in a commercial environment. This
equipment generates, uses and can radiate radio frequency energy and, if not installed
and used in accordance with the instruction manual, may cause harmful interference to
radio communications. Operation of this equipment in a residential area is likely to cause
harmful interference in which case the user will be required to correct the interference at
his own expense.

1.6.6 Warranty

During the warranty period, Barco n.v. will do all repairs free of charge
(material and labor). The faulty parts or units have to be shipped freight prepaid
to a Barco n.v. regional service center. Barco n.v. will pay the freight charges
when the repaired parts are shipped back to the customer's site.
Damage of equipment due to improper use or negligence of the safety
precautions incorporated in this manual are not covered by this warranty.

IMPORTANT

Opening the cover of the display unit voids the warranty.

The warranty does not include the following:

• Any hardware or software item procured from a source other than Barco n.v. or their

• Any host or system configuration not explicitly supported by Barco n.v..

• Consumables such as projector lamps, dust filters, ...

• All software installed on the system, whether they are acquired from Barco n.v. or a

• If any payment remains outstanding from the Purchaser to the Seller.

• Normal wear and tear, use under circumstances exceeding specifications, abuse,

• In the particular case of LCD displays, to the case of image retention phenomena

• Any failures resulting from an accident, negligence (such as but not limited to

:

official agent or distributor and integrated by Customer or a third party into Barco
n.v. supplied equipment.

third party. An exception is made for software delivered by Barco n.v. that would
prove to be a cause for the malfunctioning of the hardware covered under this
Agreement.

unauthorized repair or alteration, lack of proper maintenance.

(shadows, dark lines and other image artifacts), that may result from a usage out­side of the specification.

removing or deleting system files & licensed software product files), misuse, circuit

10 _____________________________________________________Barco - RHDM-2301 - User manual

failure or any change, damage due to fire, water, thunder or lightning, power failure
or fluctuation, disruption of communication lines or due to force majeure, or any
reason foreign to the equipment.

• Any specific services or procedures, asked for by the Customer, related to verifica­tion of repaired equipment.

• If several failures occur which are excluded from warranty due to circumstances
such as fire and if Barco n.v.’s understanding that these circumstances may result in
damage to other hardware under agreement, then Barco n.v. is entitled to termi­nate the contract. No fees will be paid back by Barco n.v. in this case. Inspection of
equipment will be required prior to the continuation of this Agreement; the same
terms and conditions as for the inspection prior to the contract apply.

1.6.7 Trademarks

Brand and product names mentioned in this manual may be trademarks, registered
trademarks or copyrights of their respective holders. All brand and product names
mentioned in this manual serve as comments or examples and are not to be understood
as advertising for the products or their manufactures.

1.6.8 Open source license

Introduction

This product contains software components released under an Open Source license. A
copy of the source code is available on request by contacting your sales representative.

See appendix A for details.

1.6.9 WEEE

In order to avoid dissemination of toxic substances in the environment and to diminish
the pressure on natural resources, we encourage you to use the appropriate take-back
systems. Those systems will reuse or recycle most of the materials of your end-of-life
equipment in a sound way.

The crossed-out wheeled bin symbol invites you to use those systems. If you need more
information about the collection, reuse and recycling systems, please contact your local
or regional waste administrator or Barco (www.barco.com).

1.7 Safety precautions

1.7.1 Earthing

WARNING

The display unit must be earthed correctly. Verify that the power cable is plugged into a standard 3-pin
power outlet which is effectively earthed. When using extension cords, make sure that they contain a
grounded connection. If in doubt, contact a qualified electrician. Ignoring this warning may lead to
personal injury or death.

Barco - RHDM-2301 - User manual ____________________________________________________ 11

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Introduction

1.7.2 Electrical warnings and cautions

• Do not power the unit with other input sources as specified in the technical specifica­tions.

• Always power-down the unit before disconnecting the power cable.

• Unplug the display unit from the power source when not in use.

IMPORTANT

Immediately unplug if:

• the power supply cord is damaged.

• the unit has been dropped or the cabinet is damaged.

• the unit does not operate normally by following the operation instructions.

WARNING

Do not remove the cover without authorization. Removal of the cover by non-qualified personnel can
cause personal injury.

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:

1.7.3 Environmental cautions

• Do not use the display unit in a dusty or damp room.

• Do not submit the display unit to heavy shocks and/or vibrations.

• Do not cover the display unit while in operation to avoid overheating.

• Do not expose to direct sunlight.

• Do not use the display at extreme limits of temperature and humidity range. Storage
and operating limits are specified in the technical specifications of the unit.

1.7.4 Requirement for dusty environments

The room in which the display unit is installed and operational must be dust-free. The
room must comply with a dust class of 8 or better according to ISO14644-1. If the room
in which the display unit is installed does not comply with the dust class stated above,
please contact Barco to discuss possibilities to protect the display unit against dust.

NOTE

:

All construction, reconstruction, decoration activities must be completed before the installation and
operation of the product.

1.7.5 LCD screen

• Do not apply pressure on the surface of the screen. If ‘waves’ are visible on the
screen below the pressing object (e.g. finger), the pressure is already too high and
the LCD may already break under these circumstances.

• Do not hit the LCD screen with hard objects.

• Do not rub the LCD screen with rough materials.

12 _____________________________________________________Barco - RHDM-2301 - User manual

• Do not touch the LCD screen with hard materials. Hard materials can cause
scratches on the surface of the LCD screen. Examples of hard material are: finger­nails, pencils, pens and styluses, wooden, plastic or metal objects.

• While moving the display unit manually, hold the LCD screen away from your body
to avoid scratching the LCD screen.

• Do not paste or stick objects with glues and/or adhesive tapes on the LCD screen.

• Wipe off water droplets or oil immediately. Ignoring this precaution could lead to
staining and/or discoloration of the LCD screen.

• Do not expose the LCD screen to direct sunlight.

1.7.6 Cover

• Do not place objects on the cover.

• Do not spill fluids over the cover or the LCD screen.

• Do not push objects into ventilation openings of the display unit.

1.7.7 Hazardous materials

Introduction

WARNING

The LCD panel is composed of multiple layers of glass and protective glass with a small amount of
liquid in between. Rough handling or dropping can cause the LCD panel to break. If any part of the skin
or body comes in direct contact with the liquid, immediately wash the affected areas with plenty of
water for at least 15 minutes. If any symptoms are present after washing, get medical care.

:

1.7.8 Specific handling precautions

• Do not power the unit with other input sources as specified in the technical specifica­tions:

 AC power source: 100-240 Vac, 50-60 Hz
 DC power source: 24Vdc

• Do not push objects into ventilation openings of the display unit.

Barco - RHDM-2301 - User manual ____________________________________________________ 13

First operation

2 First operation

2.1 Unpacking, installation and cabling

For unpacking, installation and cabling please refer to:

• The quick installation sheet

• The section “Installation” in the Addendum

NOTE

:

The display unit is almost fully mounted when unpacked. Do not forget to connect the power and USB
cable between the display unit and the control panel.

2.2 Overview locations for operation

1

2

3

4

5

6

Figure 1: Overview of operational controls, indicators and OSD functionalities

Different operation interfaces:

1) Status bar

2) OSD menu

3) Toolbox

4) Under Monitor Display bar / Picture Adjustment bar

5) Indicator lights

6) Control panel

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First operation

2.3 Switch on the display unit

This section is intended for a user who has no experience with the display unit and
describes the standard settings that are necessary to get the display unit up and running.
Please check the chapter with the “full functionality description” to find detailed
information on each part and each function of the display unit.

1

2

3

1 Power LED (green or orange)

2 Standby LED (green or orange)

3 Calibration/Error LED (orange or red)

Figure 2: Overview indicator lights

NOTE

:

The display unit has a certain delay time between powering up and displaying an image on the screen
(20 seconds). The delay time originates from several internal checks and calibrations that are
performed to guarantee the correct display of the image. When in doubt about the status of the display
unit, please read the troubleshooting in the addendum.

• Check the indicator lights to verify the status of the display unit. When no
indicator lights are lit, check the installation instructions in the addendum to power
up the display unit (check if the power switch at the back is switched on).

 Power LED = green: Display unit is switched on – no further actions are nec-

essary.

 Power LED = green and Standby LED = orange: Display unit is switched on

(soft standby) – the panel and backlights are switched off. Press (
the control panel to activate the panel and backlights.

 Power LED = orange: Display unit is switched off (hard standby) – press (

)  on

 on the control panel to switch the display unit on. The Power LED will light

up green.

)

Barco - RHDM-2301 - User manual ____________________________________________________ 15

First operation

1

1 Power button

2Track ball

Figure 3: Control panel – power button

Check the functionality of the control panel. Wiggle the track ball. When the

•
buttons of the control panel do not light up while the power LED is green, check if
the USB cable and the power cable between the display unit and the control panel
are properly connected. For more information, please consult the installation
instructions in the addendum to connect the control panel to the display unit.

2.4 How to register the display unit

Registration of your product will enable Barco to establish a link to the product at your
site. When the display unit is started up for the first time, a “Welcome” message will be
shown. It is not possible to operate the display unit without its registration at the Barco
website. To register your product, follow the instructions below:

Write down the “current pincode” of the display unit that is displayed on the screen.

2

Figure 4: “Welcome” message at first start-up

16 _____________________________________________________Barco - RHDM-2301 - User manual

First operation

License pincode

Collect the envelope with the license pincode of your software features from the box of
the display unit.

Registration of your product

Register your product on the personalized webpage of barco to obtain license files for
your products (https://my.barco.com/productregistration/
registered at once (but this is not necessary) and one license file will be made. In case
my.barco.com is not available, please contact Barco service at:

EMEA contact details:

Tel: [phone]
Fax: [phone]
e-mail: [e-mail]

US contact details:

Tel: [phone]
Fax: [phone]
e-mail: [e-mail]

Install the license file

Copy the license file (filename: “barcoLicense”) that you obtained from my.barco.com or
from customer service to a USB stick (in the root). Place the USB stick in the USB port of
all the display units that you have registered on my.barco.com.

). All products can be

IMPORTANT

Only license files with a filename “barcoLicense” (case sensitive, no extensions) will be recognized by
the display unit. If you obtain a file which has additional information in its name (such as customer ref­erence, serial number etc), please rename the file to barcoLicense for purposes of license upload, and
keep a copy of the original file for your records.

IMPORTANT

Verify that the USB stick used to register your product does not contain a RHDM software file (xxx.deb)
in the root. Software update always has priority, so it will always be executed instead of license
upgrade if the software .deb file is present.

The display unit will recognize the license file automatically. The following message
appears when the update is successful. The display unit will be accessible for normal
operation immediately.

:

:

Barco - RHDM-2301 - User manual ____________________________________________________ 17

First operation

display
PINcode

Register at
my.barco.com

License
PINcode

USB

license
file

Registered
monitor

Figure 5: Schematic overview of the registration process

2.5 Concepts of operation

In this introductory section the concepts of the operation of the display unit will be
explained. Details about the operation of the display unit can be found in the chapter “Full
functionality description”.

Control panel

The operation of the display unit is facilitated by the control panel. The control panel
contains different sections of buttons and knobs that allow the user to interact with the
display unit in a fast and easy way.

Buttons

Some of the buttons (especially the functions keys) have a double functionality and can
be used as follows:





Short press Instantaneous effect

Long press (press longer
than 2 seconds)

Open a toolbox with advanced settings

The function keys contain most of the settings of the display unit. It is important to
understand the division of the function keys based on the effect that they have on the
processing of the video signal.

1

2

3

4

Figure 6: Function keys divided into categories

18 _____________________________________________________Barco - RHDM-2301 - User manual

First operation

Categories of
function keys

1Select input

2View mode

3 Display settings

4 Input settings

Rotary knobs

Description

The video signals to be viewed on the screen are selected by the user
via a window. There are 2 windows that can be selected by pressing

)  for window 1 and  for window 2. Once a window is se-

(
lected, pressing (
that are available for that window.

Enables the user to select the way the windows should be viewed on
the screen (e.g. only window 1, only window 2 or both windows
shown next to each other).

These settings have an effect on the full display and affect the video
signal viewed and processed in both windows.

These settings have an effect on each window separately. The set­tings applied to a window are stored in the memory. Selecting anoth­er window to be viewed will not result in loss of the previously defined
input settings of the other window.

) the same button will toggle between the inputs

1

2

3

4

Figure 7: Location of the image adjustment rotary knobs on the control panel

The image adjustment knobs control the settings of Background (1), Picture (2),
Saturation (3) and Hue (4). Changing these settings will result in the display unit working
out of the calibrated range. These settings apply to the each window separately.

Figure 8: Picture adjustment bar

When one of the rotary knobs is pressed or turned, the picture adjustment bar is shown
at the bottom of the screen. This information bar shows the actual value of all the rotary
knobs.

Barco - RHDM-2301 - User manual ____________________________________________________ 19

First operation

Trackball

The trackball enables the user to navigate through the menus, change the value of a
selected item and to move the pointer (only in pan&zoom mode).

 button enables the user to edit and confirm a value or setting in the toolbox or

The
OSD menu. The

operations in the pan&zoom mode.

Status bar

The status bar is shown at the top of the screen and contains relevant information related
to the settings of the input signal settings and the setting of the display unit. The line
highlighted in white indicates the active window.

Calibrated settings

The display unit is a calibrated instrument that continuously monitors several parameters
to ensure correct representation of colors and luminance levels.

The user can decide to run the display unit in a non-calibrated mode by adjusting the
settings defined by the image adjustment knobs (picture, background, saturation and
hue). When the values of the image adjustment knobs deviate from the calibrated values,

the orange light above the knob will light up. Press (
calibrated (default) setting (when the picture adjustment bar is visible).

The user can also decide to show only one of the 3 color channels or to convert the video
signal to monochrome.

 button also acts as a “left” mouse button for drag and zoom

) the knob to return to the

In all these cases also the  button will light up orange. Press () the  button to go
back to the calibrated status of the display unit.

2.6 How to setup the display unit

In this section a number of settings are discussed which are primarily preference settings
that can be set by the user.

• Set the
display remains calibrated in the allowed picture range (45-150 cd/m2). The picture
of the display unit can thus be adjusted according to the preference of the customer.

• The display unit is a digital display, so the
rectly to the LCD black. Depending on the ambient light illumination and reflection
from the screen it might be necessary to align (lift) the black level using a “Pluge”
test pattern and adjusting the

• Toggle the
SMPTE RP145). The color working space determines the color primaries (compara­ble to the CRT phosphors) that are used to display the image on the screen. This
setting is a geographic region preference setting.

• Enter the color working space toolbox by pressing
required white point (default D65). Store the setting under a “Custom” preset.

• Enter the input window menu by pressing
input range to be visualized on the screen (default 64-1019). Select the OETF (opto­electric transfer function – ‘gamma’) (default is ITU.709).

• Input signals which have an identifier packet describing the type of input signal are
processed automatically by the display unit. When the

an identifier packet

Picture (!) to the required luminance. The default value is 100 cd/m

signal black level is always mapped cor-

Background ( ) of the display unit.

 button until the required color working space is selected (e.g.

 ( - long press). Set the

 or  ( - long press). Set the signal

input signal does not have

, it may be that the display unit is not able to display the input

2

. The

20 _____________________________________________________Barco - RHDM-2301 - User manual

First operation

signal correctly. In this case it is necessary to set the input signal properties manu­ally:

 Press  to enter the OSD menu.
 Use the trackball to move the submenu “Input settings”.
 Select the type of input that is connected to the input board (Single or Dual

link).

 When the signal description in this submenu is not correct, override the signal

detection and set the input signal properties manually. E.g. for Dual Link:
RGB, 4:4:4, 10 bit and Segmented frame.

Barco - RHDM-2301 - User manual ____________________________________________________ 21

How to

3 How to

3.1 Legend





Short press Instantaneous effect

Long press (press longer
than 2 seconds)

Open a toolbox with advanced settings

3.2 How to change the license installed on the display unit

Activate the “Admin mode” that you can find in the main menu

• Press (

)  to open the OSD menu

• Provide the administrator password:

Administrator password is “313329”

• Activate the “Generate new Pincode” in the license OSD menu:

IMPORTANT

Do not generate a new pincode unless you plan to install new licenses on your product. Generating a
new pincode will disable the license and the feature packs on your product! When you have generated
a new pincode by accident, follow the instructions below to reinstall the license and the feature packs
on the display unit.

22 _____________________________________________________Barco - RHDM-2301 - User manual

:

How to

Figure 9: License OSD menu

Confirming this dialog will remove the license and all feature packs from the display unit
and generate a new pincode.

The following message is shown on the screen if “generate new pincode” is confirmed:

Barco - RHDM-2301 - User manual ____________________________________________________ 23

How to

It is recommended to deactivate the admin mode after removing the feature packs from
the display unit.

With the newly generated pincode, you can assign new/other licenses to the product on
the Barco website (https://my.barco.com

).

• Generate a new license file on my.barco.com.

• Place the license file on a USB stick and connect the USB stick to all display units
that need to be updated with the new licenses.

• The following message appears when the update is successful and the display unit
will operate normally immediately:

24 _____________________________________________________Barco - RHDM-2301 - User manual

How to

3.3 How to view signals connected to the SDI input board

INPUT 1 INPUT 2

1
T
O

L
S

A1

B1

IN OUT

IN OUT

Figure 10: Input connectors SDI input board

The standard input board that is mounted in slot 1 is a SDI input board. The SDI input
board has two inputs that are separately connected with a loop-through output connector.

NOTE

:

The input signals are not available at the loop-through output connectors when the display unit is in
hard standby (Power LED = orange).

Up to 2 inputs can be applied to the SDI board simultaneously. In the table below the
possible combinations are shown:

Input SDI board Input 1 Input 2

Possible inputs

SDI
HDSDI
3Gb/s (optional)

Dual link (optional)

SDI
HDSDI
3Gb/s (optional)

To select a valid signal, open the
button of the window in which the input signal has to be shown

input selection toolbox by pressing long () on the

 or .

The concept of selection and viewing of the valid signals is summarized in the figure
below:

ACTIVE WINDOW
is shown on screen

WINDOW 1

press

WINDOW 2

press

press

INPUT 1

INPUT 2

INPUT 1

INPUT 2

press

Figure 11: Selection of inputs window 1 & 2

Barco - RHDM-2301 - User manual ____________________________________________________ 25

How to

To toggle between the input options for the active window, press () the same button to
toggle between the input options. The selected input is shown instantaneously. To change
the active window, press (
activated instantaneously.

In the example shown in the figure above, window 1 is active and shows the signal
applied to input 1 on the screen. Pressing (
inputs (input 1 and input 2). Pressing (
active, its selected input (in this example this would be input 2) is shown on the screen.

NOTE

:

When no valid input is present for a certain input option, the screen will blank and show the “Invalid
input“ icon. When the display unit was powered off, this is the standard setting for both windows.

) the button of the other window. The other window will be

)  will toggle between the available

)  will select window 2. When window 2 is

IMPORTANT

It is possible to select the same input signal for both windows.

The active window is highlighted in white in the status bar at the top of the screen. When
the status bar is hidden, move the track ball or press a button to show/reveal the status
bar. The status bar hides automatically after the timeout time set in the “OSD settings”
menu in the OSD menu.

Figure 12: Zoom in of the status bar at the top of the screen

NOTE

Input settings are connected to the window. When input settings are changed for a specific window,
they are stored instantaneously.

:

:

26 _____________________________________________________Barco - RHDM-2301 - User manual

3.4 How to change the color working space

Figure 13: Location of buttons to change color working space

How to

• Press (
working space is shown at the top of the screen in the status bar.

OR

• Press (

• Navigate with the trackball to the top of the toolbox “color space”.

• Press (

• Use the trackball to cycle through the defined color working spaces.

• Press (

NOTE

:

The newly selected color working space is applied instantaneously to the output on the screen and
always applies to both windows. The color working space which is currently used to display the image
on the screen, is shown in the status bar.

)  to cycle through the available color working spaces. The current color

)  to open the color working space toolbox.

)  or ()  to change the color working space.

)  or ()  to confirm the color working space.

3.5 How to visualize the dark levels

The dark levels are accessible with the background control on the image adjustments
knobs. The background control can be changed between -127 and 128 and is set to 0 by
default. The unit of the values of the background control is expressed as a number of
levels (in 8-bit steps).

Figure 14: Location of the background adjustment control

Barco - RHDM-2301 - User manual ____________________________________________________ 27

How to

By increasing the value of the background, the information in the footroom of the video
signal (below 0% video signal) becomes visible.

e

100 %

v
i

r
d

D
C
L

clipping
bright levels

+

Visualize
super bright

-

Black
offset

Visualize
super dark

Black
0 %

clipping
dark levels

3.6 How to maximize contrast

White
100 %

Video signal

To maximize the contrast of the display unit, the following settings can be applied:

Black correction

• When the correctness of the colors at the dark grey levels is of lower importance
than the contrast, the contrast can be enhanced by setting the black correction to
0%.

• Go to the OSD menu by pressing (

28 _____________________________________________________Barco - RHDM-2301 - User manual

) 

• Move with the trackball to select the “Input settings” in the main menu.

How to

• Press (
settings” menu

• Move with the trackball down to the “Black correction” setting of the appropriate
window

• When black correction is set at a value different from 0%,

• Move with the trackball down to the “Uniformity” and uncheck the box by pressing
(

Set the signal range of the input signal

If there are no colors in the headroom and/or the footroom, the contrast can be enhanced
by clipping the headroom and/or the footroom. When clipping occurs, a certain portion of
the input range of the video signal is mapped to the maximum light output of the LCD.

• Press (
on window 1 and

• Move with the trackball to select the “signal range” setting

• Press (

• Move with the trackball up/down to set the new signal range

)  or () , or move with the trackball to the right to open the “Input

 press ()  or ()  to select the value
 move with the trackball down or type “0” on the numeric keypad to set the

value to 0%

 press (

)  or ()  to confirm the value

)  or () .

) / to open the “select input” toolbox ( if the input signal is shown

 if the input signal is shown on window 2)

)  or ()  to select the signal range 64-940.

• Press (

)  or ()  to confirm the selection

3.7 How to correct the black level

In some cases the correctness of the colors at the dark grey levels are of higher
importance than the contrast. The black correction in the “Input settings” OSD menu can
be set for each window separately.

To optimize the color correctness of the dark grey levels, the black correction should be
set to 100%. As a tradeoff for the optimized color correctness of the dark grey levels, the
contrast is reduced.

When the black correction is set to 0%, the contrast is maximized.

• Go to the OSD menu by pressing (

• Move with the trackball to select the “Input settings” in the main menu.

• Press (

• Move with the trackball down to the “Black correction” setting of the appropriate
window

• When black correction is set at a value different from 100%,

)  or ()  to open the “Input settings” menu

 press (
 move with the trackball up or type “100” on the numeric keypad to set the

value to 100%

 press (

)  or ()  to select the value

)  or ()  to confirm the value

) 

Barco - RHDM-2301 - User manual ____________________________________________________ 29

How to

3.8 How to enable native interlaced mode (black line insertion)

Set the Deinterlace mode to “black line insertion”:

• Go to the OSD menu by pressing (

• Move with the trackball to highlight the “Input settings” in the main menu

• Press (

• Move with the trackball to the “Deinterlace mode” setting of the appropriate window

• Press (

• Move with the trackball (up or down) to select “black line insertion” mode

• Press (

)  or ()  to open the “Input settings menu”

)  or ()  to select the mode

)  or ()  to confirm the “black line insertion” mode

) 

3.9 How to change the aspect ratio

Track ball

Figure 15: Location of the button to change the aspect ratio

• Press (
applied instantaneously to the window.

or

• Press (

• Select the aspect ratio using the trackball.

• Press (

NOTE

:

The aspect ratio can be set for each window separately.

30 _____________________________________________________Barco - RHDM-2301 - User manual

)  to toggle between all possible aspect ratios. The aspect ratio is

)  to open the aspect ratio mode selection toolbox.

)  or ()  to confirm the selection.

3.10 How to select a color channel

Track ball

Figure 16: Location of buttons to select a color channel

1. Set the color channel

How to

• Press () 

• Select “Channel selection”

 Move with the trackball to highlight “Channel selection”
 Press (

ting is applied immediately to the selected window.

• Select the color channel

 Move with the trackball to highlight a color channel
 Press (

immediately to the selected window.

• When “Show in monochrome” is selected, the selected color channel will be shown in
monochrome.

• Press (

2. Toggle between full color and the selected setting

• Press () . The setting is applied immediately to the selected window.

NOTE

:

•

The color channel selection toolbox shows the selected color channel for the active window only.

•

When only one color channel is selected, the cal/err indicator light will light-up orange to alert the

user the display unit is working out of the calibrated range.

)  to exit the color adjustments toolbox.

)  or ()  to activate the “Channel selection” option. The set-

)  or ()  to select a color channel. The setting is applied

Barco - RHDM-2301 - User manual ____________________________________________________ 31

How to

3.11 How to show two input signals next to each other

• Press () 

WINDOW 1 WINDOW 2

SINGLE INPUT

Figure 17: View mode functionality

pointer

double arrow

The inputs selected for window 1 and window 2 are shown together on the screen. When
the display is showing the inputs in Pan&Zoom or dual view mode, the input settings can

still be changed by pressing
through the available inputs for that window. The changes will be shown instantaneously.

In the
screen. In this mode it is possible to pan the image and to zoom in on the image. These
functions can be performed for window 1 and window 2 separately.

To change the relative size of the two parts of the screen in the Pan&Zoom mode:

Pan&Zoom mode the two inputs are shown in full format (cropped) on the

• Move with the pointer to the separating line in the middle of the screen using the
trackball

• When the double arrow appears while hovering with the pointer above the separat­ing line, press
using the trackball

 (continuously) and drag the separating line to the left or the right

PAN&ZOOM

 or  to activate the respective window and/or cycle

WINDOW 1

DUAL VIEW

WINDOW 2

• Release

In the
ratio remains unchanged while up- or downscaling.

32 _____________________________________________________Barco - RHDM-2301 - User manual

dual view mode, the two inputs are scaled to fit the new window size. The aspect

 to leave the separating line at the obtained position

3.12 How to pan the image

Track ball

Figure 18: Location of buttons to pan the image

Pointer – can be used for panning

How to

• Press (
shown next to each other.

• Move the “pointer” (using the trackball) to the window where the video signal has to
be panned.

• Press
When

perform a new pan on the same window.

)  until the Pan&Zoom setting is selected. Window 1 and window 2 are

 (continuously) to grab the image and use the track ball to pan the image.

 is released, the “pointer” can be moved to pan the other window or to

3.13 How to zoom in on the image

Track ball

Figure 19: Location of buttons to zoom in on an image

pointer

magnifying glass

Barco - RHDM-2301 - User manual ____________________________________________________ 33

How to

• Press ()  until the Pan&Zoom setting is selected. Window 1 and window 2 are
shown next to each other.

• Pan the image to the appropriate position on the screen.

• Press

• Move the magnifying glass (using the trackball) to the location where the video sig-

• Press

 to select the magnifying glass.

nal has to be zoomed in.

 continuously to lock the place and use the trackball to zoom in/out. When

 is released, the magnifying glass can be moved to another window or another

spot on the screen.

IMPORTANT

When an image is zoomed, pixel repetition is used to display the image on the screen. This means that
the image is magnified according to an integer amount. No scaling artifacts are introduced.

:

34 _____________________________________________________Barco - RHDM-2301 - User manual

3.14 How to upload new software

3.14.1 Important notice

Major and minor software updates exist for the display unit. A major software update is
marked by a change in the first order digits (e.g. from 1.xx to 2.xx) while a minor
software update is marked by a change in the second order digits (e.g. from 1.00 to

1.01).

How to

IMPORTANT

It is not possible to
sion.

:

downgrade

the software version of the display unit with a major software revi-

3.14.2 Software upload via ethernet

1. Connect the display unit to the local network

• Plug an ethernet cable in ethernet port 0 or ethernet port 1.

2. Connect with the pc to the display unit

• Check the IP address that is assigned to the ethernet port. Press ()  to open
the “Display Information” toolbox. Write down the IP address of the corresponding
ethernet port.

Barco - RHDM-2301 - User manual ____________________________________________________ 35

How to

• Open a browser window and type in the Address bar: “http://” + the IP address + “/
” (e.g. “http://150.158.200.140”). The web interface of the display unit will open.

3. The software upload

• Select “Admin…” from the selection menu on the left hand side of the webpage.

• An authentification will be requested. To enter the Admin section:

 User name: “admin”
 Password: “admin117234”

36 _____________________________________________________Barco - RHDM-2301 - User manual

How to

• When the valid user name and password are entered, the Admin section will be
opened in the webpage.

• Click on “Upgrade firmware”

• Click on “Browse” and select the debian software upload package (xxx.deb) that
needs to be uploaded into the display unit.

• Start the upload of the software by pressing “Update”. The upload of new software
will start immediately. The pc will show the progress of the software upload while
the display unit will show the following warning message on the screen:

• After the software upload, the display unit will reboot automatically and will start-up
using the newly uploaded software.

IMPORTANT

:

If the upload of the new software would fail or would be interrupted, the display unit will reboot into
the failsafe mode. The software version of the failsafe mode is the most recent software version that
was uploaded successfully.

Barco - RHDM-2301 - User manual ____________________________________________________ 37

How to

3.14.3 Software upload via USB

1. Prepare data on USB stick

• Save the new software upload package (xxx.deb) on a USB stick. Place the file in the
root and not in a folder.

2. Software upload

• Place the USB stick in a USB port of the display unit (at the back of the display unit)
or in the USB port of the control panel (verify that the USB cable and the 12Vdc
cable between the control panel and the display unit are properly connected).

• The display unit will search for the latest software upload file. The following warning
window appears on the screen

• The display unit will automatically start the software upload after
unless the display unit is powered off or the USB stick is removed. When the display
unit is busy with the upload of the new software, the following warning is shown on
the screen:

• When software update has started (“Software update busy”) the USB stick can be
removed (all data is already transferred).

• The display unit automatically reboots after finishing the software upload.

IMPORTANT

If the upload of the new software would fail or would be interrupted, the display unit will reboot into
the failsafe mode. The software version of the failsafe mode is the most recent software version that
was uploaded successfully.

:

10 seconds

NOTE

:

It is advisable to remove the USB stick after software update since the display unit will automatically
recognize the firmware on the USB stick at each power up or activation from hard standby. The display
unit will then start the automated firmware update process. This does not happen after the reboot
resulting from the software update!

38 _____________________________________________________Barco - RHDM-2301 - User manual

4 Full functionality description

4.1 Operation

4.1.1 Overview of operation functionalities

1

2

3

4

Full functionality description

5

6

Figure 20: Overview of operational controls, indicators and OSD functionalities

Different operation interfaces:

1) Status bar

2) OSD menu

3) Toolbox

4) Under Monitor Display bar / Picture Adjustment bar

5) Indicator lights

6) Control panel

Barco - RHDM-2301 - User manual ____________________________________________________ 39

Full functionality description

4.1.2 Operational mode overview

The operational status of the display unit can be summarized in the figure below:

Figure 21: Operational mode overview

40 _____________________________________________________Barco - RHDM-2301 - User manual

4.1.3 Indicator lights

1

2

3

1 Power LED (green or orange)

2 Standby LED (green or orange)

3 Calibration/Error LED (orange or red)

Full functionality description

Figure 22: Location of indicator lights

The indicator lights give information about the status of the display unit.

Power LED:

• Orange: The display unit is in hard standby.

• Green: The display unit is powered. All signals at the input boards are processed.

• Green and orange:

 Green is blinking and orange is on: Display unit performs a power test. This

occurs when the display unit is switched on and when the display unit is
switching internally from the 24Vdc power supply to the 100-240Vac power
supply.

 Green is on and orange is blinking: Display unit is switching off.
 Green and orange are both on – yellow color observed: Display unit performs

a power overload test. This occurs when the display unit is switching inter­nally from the 100-240Vac power supply to the 24Vdc power supply.

NOTE

:

The display unit chooses the power source automatically. A valid power source connected to the 100­240Vac input has the highest priority.

Standby LED:

• Orange: The display unit is powered but is in soft standby mode. All signals at the
input boards are processed. The backlights and panel are turned off.

Calibration/Error LED:

• Orange: The display unit is operating out of the calibrated range.

• Red: A Fault has occurred. On the control panel the “FAULT” LED will light up red as
well.

Barco - RHDM-2301 - User manual ____________________________________________________ 41

Full functionality description

IMPORTANT

When an error occurs, consult in the OSD menu the OSD submenu “Status controller” to read the
warning and/or fault messages.

:

4.1.4 Control panel

4.1.4.1 Overview operation control panel

Figure 23: Drawing of the control panel

The control panel allows the user to change a wide variety of settings in a clear and easy
way. To apply the desired settings, the control panel is equipped with:

• a USB port

• press buttons

• press and rotary knobs

• a trackball

4.1.4.2 USB port

A USB storage device with the latest firmware will immediately be recognized and the
display unit will initiate a firmware upload automatically. It is also possible to connect a

mouse as a replacement of the trackball and the
buttons.

 (left button) and  (right button)

4.1.4.3 Press buttons

The press buttons have a “short press” and a “long press” functionality. In this manual
the action of a short or long press is indicated by the following icons:





When the buttons are pressed shortly, the function is immediately applied to the image.
Most of the buttons have an advanced function when the button is pressed for a long time

(longer than 2 seconds). In the latter case, a
the screen.

Some buttons on the numeric keypad can be used as a

Short press Instantaneous effect

Long press (press longer
than 2 seconds)

Open a toolbox with advanced settings

toolbox appears on the left hand side of

function key.

4.1.4.4 Press and rotary knobs

The rotary knobs are used for easy adjustments of basic settings.
Turning the rotary knob:

• Image adjustment bar not visible: image adjustment bar is shown

42 _____________________________________________________Barco - RHDM-2301 - User manual

Full functionality description

• Image adjustment bar visible: value that corresponds to the rotary knob is changed

 Turning clockwise = increasing value
 Turning counterclockwise = decreasing value

Pressing the rotary knob:

• Image adjustment bar not visible: image adjustment bar is shown

• Image adjustment bar visible: value that corresponds to the rotary knob is set to its
default and calibrated value.

4.1.4.5 Trackball

The trackball allows the operator to move the pointer or navigate in the menus.

4.1.4.6 LEDs

Power on and input calibrated:

• The power button is lit green.

• All other buttons are lit white.

Standby:

• The power button is lit orange.

• All other buttons are lit white.

Power on and input not calibrated:

• The power button is lit green.

• The calibration button is lit orange.

• The LED above the image adjustment knob is lit orange when the setting is out of
the calibrated range for the selected input. When the calibration is performed, by
pressing the calibration button, the orange lights disappear and the calibration but­ton is lit green.

• All other buttons are lit white.

NOTE

:

The lights behind the buttons go out 10 seconds after all activity on the control panel has stopped. The
buttons remain active when the lights after the buttons are out. Pressing a darkened button will
execute the function represented by the button immediately. Only the power button is functional when
the display unit is in hard standby.

Barco - RHDM-2301 - User manual ____________________________________________________ 43

Full functionality description

4.1.5 Status bar

The status bar is shown at the top of the screen and contains information related to the
selected signals for window 1 and window 2.

Figure 24: Screenshot status bar (upper part – left side, lower part – right side)

The following information is shown:

• Window for which the information is valid

• Input board that is used to process the selected input signal

• Input detection overrule indicator

• Input signal description

• OETF

• Color subsampling

• Encoding

• Scale mode

• Aspect ratio

• Backlight scan mode

• Light output

• Color working space

• Latency of the input signal selected by the active window (0 ms when no signal is
connected)

The information of the active window (displayed on the screen) is highlighted in white.

NOTE

:

In dual view or pan&zoom mode, both input signals selected by the windows are shown on the screen.
The active window is still highlighted in white in the status bar and refers to the fact that certain
settings can be changed for the active window only (e.g. toggle between color and monochrome by

pressing ()  will only be applied to the active window).

44 _____________________________________________________Barco - RHDM-2301 - User manual

Full functionality description

4.1.6 Invalid signal indicator

Figure 25: “Invalid signal” indicator

When the signal selected by the active window is not valid, or when there are no signals
available, then the “Invalid signal” indicator is shown on a black screen.

4.1.7 Under monitor display bar (optional)

Figure 26: Screenshot UMD bar with two tally lights

The Under Monitor Display (UMD) bar is shown at the bottom of the screen and has two
tally lights.

4.1.8 Picture adjustment bar

Figure 27: Screenshot Picture adjustment bar

The picture adjustment bar appears at the bottom of the screen (over the UMD) when the
setting of Background, Picture, Saturation or Hue is changed.

4.1.9 Pointer functionality

Icon Description Action

Pointer pan the image

Pointer out of active zone none

Magnifying glass zoom in/out

double arrow Resize windows

Barco - RHDM-2301 - User manual ____________________________________________________ 45

Full functionality description

The pointer is activated when the display unit is in the “pan&zoom” mode. When the
pointer is in the active zone (where the video is displayed), the “hand” is shown. When
the pointer in out the active zone (status bar or picture adjustment bar), the “arrow” is
shown. The following actions can be done:

• Pressing (

• Pressing (
action.

)  toggles between the pointer and the magnifying glass.

)  activates the “action” property. Use the trackball to execute the

4.1.10 Toolbox

The toolbox of a particular setting appears on the screen when a button is pressed for a
long time (
settings. A screenshot of the Color Channel Selection toolbox is shown below as an

example:

). The toolbox appears on the left side of the screen and reveals additional

The trackball can be used to navigate in the toolbox and to select a setting. Settings can
be activated and deactivated by pressing (

) the select button  or by pressing ()

.

The value of the setting can be changed when “up” and “down” arrows appear right after
the value (see picture above). Press (

The timeout of the toolbox can be set in the OSD menu. The toolbox can be closed by
pressing (
right corner.

) the exit button  on the control panel or by selecting the cross in the top

) again  or  to confirm the new value.

4.1.11 On screen display menu

The On Screen Display (OSD) menu contains the settings that are not frequently used.
The OSD menu can be accessed by pressing (

The trackball can be used to navigate in the menu and to select an option and/or setting.
Moving up/down with the track ball will allow scrolling through the different options.
Moving the track ball to the left will close the OSD submenu. Moving the track ball to the
right will open a deeper OSD submenu.

Settings can be activated and deactivated by pressing (

)  on the control panel.

)  or by pressing () .

46 _____________________________________________________Barco - RHDM-2301 - User manual

Full functionality description

The timeout of the OSD menu can be set in the OSD menu “OSD settings”. The OSD
menu can be closed by pressing (

) .

4.1.12 Web interface

The display unit has a web interface. When a pc is connected via the local network or
directly to one of the ethernet ports of the display unit, the settings of the display unit
can be monitored and/or changed via the pc.

The web interface can be loaded via a standard web browser by browsing to the IP
address of the ethernet port of the display unit that is connected to the local network.

Barco - RHDM-2301 - User manual ____________________________________________________ 47

Full functionality description

4.2 Settings control panel and toolbox

4.2.1 Overview buttons control panel

The display unit can be operated with the control panel. The control panel is divided in
different functional blocks. The functionality of the buttons in each block will be discussed
in detail in the following sections.

3

2

1

Figure 28: Control panel

The buttons on the control panel can perform an instantaneous operation or open a
toolbox, depending on whether the button is pressed short (





The control panel consists of the following functions:

1 USB connector

2 Control buttons

3 Fault LED

Short press Instantaneous effect

Long press (press longer
than 2 seconds)

Block Functionality

4

Open a toolbox with advanced settings

Access to the display unit to upload new display firmware in an
automated way.

Allows the operator to switch the display unit on/off and set the
display unit to preset and calibrated values.

Lights up when a “fault” is detected by the display unit.

5

6

7

) or long ().

4 Image adjustment

knobs

5 Function keys

6 Numeric keypad

7 Navigation pad

48 _____________________________________________________Barco - RHDM-2301 - User manual

Adjusts the Background, Picture, Hue and Saturation of the dis­played video signal.

Groups all basic functions that can be used to display the input
signal.

Keypad to enter numeric values.

Buttons to access the On Screen Display (OSD), to select items
and to call possible options. A trackball for easy pointer move­ment.

4.2.2 Control buttons

4.2.2.1 Overview control buttons

Figure 29: Control buttons

4.2.2.2 Power button

Function Description

Full functionality description



Power button

Display unit is switched off:

•

 switches display unit on

Display unit is switched on:

 sets the display unit into soft standby mode. The panel and

•

backlight are disabled.

 sets the display unit into hard standby mode. The panel,

•

backlight and electronics are disabled. Only the  button re­mains functional.

Barco - RHDM-2301 - User manual ____________________________________________________ 49

Full functionality description

4.2.2.3 Screen select button

Function Description



Screen select

 Opens the Display information toolbox:

• Display name: Name of the display unit

• Serial number: Serial number of the display unit

• Software version: Version of the currently active
software

• Network information:

eth0/ eth1

DHCP: switches the DHCP protocol on/off
IP Address: current IP address assigned to the display

unit
IP Netmask: current netmask address
Gateway: current gateway address
MAC: MAC address of the ethernet port

• Apply: confirm the changes of the settings

• Cancel: cancel the changes of the settings

• Refresh: refresh the IP address, IP netmask, Gateway
and MAC address.

Note: To change a value, select the item that has to be
changed using the trackball. Press (
edit the value with the trackball. The value can also be
edited by typing the numbers using the numeric keypad
on the control panel (use
puts). When the desired value is reached, Press () 

 to confirm.

or

 to cancel erroneous in-

)  or and

4.2.2.4 Calibration button

Function Description



Calibration

4.2.3 Fault LED

Figure 30: Fault LED

 Resets Background, Picture, Hue and Saturation and RGB/

Mono select to the preset values. The  button is connected with

 button. The last selected/saved preset in the color working

the
space toolbox will be selected by pressing () .

50 _____________________________________________________Barco - RHDM-2301 - User manual

Full functionality description

The Fault LED lights up when a hardware failure is detected by the display unit. The Fault
LED does not refer to the display unit operating in non-calibrated mode. When the Fault
LED lights up red, the Cal/Err indicator LED on the bezel will also light up red.

IMPORTANT

When an error occurs, consult the OSD submenu “Status controller” to check the warning and/or fault
messages.

NOTE

When the display unit starts-up from a hard standby status, the Fault LED lights up during the
initialization. When the control panel is fully operational and when the display unit did not detect
problems during start-up, the Fault LED will go out.

:

:

4.2.4 Image adjustment knobs

Figure 31: Image adjustment knobs

Function Description

!

#

$

Pressing the knob (

NOTE

Background Adjusts the background (from -127 to +128). The background is equiv-

alent to video offset and is expressed in 8-bit steps.
Calibrated value: 0 (default)

Picture Adjusts the picture (from 45 to 200). The picture is expressed in cd/m2

(nit).
Calibrated value: 100 (default)
The calibration of the color gamut, white point and gamma is main-

tained when the picture is between 45 cd/m

Saturation Adjusts the saturation (from 0 to 250). The saturation is expressed in

percentage (%).
Calibrated value: 100 (default)

Hue Adjusts the hue (from -90 to +90). The hue is expressed in degrees (°).

Calibrated value: 0 (default)

2

and 150 cd/m2.

) sets the value back to the calibrated (preset) value.

:

•

When the value of the image adjustment knobs deviates from the calibrated value, the display unit

operates out of the calibrated range. The LED above the knob will light up orange.

Barco - RHDM-2301 - User manual ____________________________________________________ 51

Full functionality description

•

The image adjustments knobs act only on the active window. The value of these settings can be

defined for each window separately.

4.2.5 Function keys

4.2.5.1 Overview function buttons

Figure 32: Function buttons

4.2.5.2 Select input button

Input range settings

The figure above illustrates the influence of the selected input range on the
conversion of the input signal to the image which is shown on the screen. For
SDI signals the range can be set to 4-1019 (maximal). For DVI signals the input
range can be extended to 0-1023 (maximal).

52 _____________________________________________________Barco - RHDM-2301 - User manual

Function Description

Full functionality description





Select input

 Toggle between input selections for Window 1 (2).

Each input is instantly displayed on the screen. When
window 1 (2) is valid/active, pressing
tivate the other window 2 (1).

 () will ac-

 Input configuration toolbox appears. The available

inputs for window 1 (2) are listed. Move with the track­ball to select an input and press
lected input.

For all available input signals, the timing, color sub-sam­pling and frequency is shown.

If 2 windows are shown next to each other, the left win­dow is window 1.

The input signals applied to the display unit are automat­ically detected and placed in the input selection list (au-

tomatic input detection).
Gamma Settings: these settings apply to the selected

window only.

• OETF: Setting of the opto-electrical transfer function.
Possible settings are: xvYCC, Rec.709, Pure Gamma, Ex­tended Gamma, SMPTE 240M or sRGB.

• Gamma: Custom setting of the gamma exponent.

• Signal range: Setting of the signal range. Possible
settings are 0-1023, 4-1019, 4-940, 54-1019 or 64-940.

• Headroom level: custom setting of the headroom lev-
el.

• Footroom level: custom setting of the footroom level.

 to confirm the se-

IMPORTANT

The Gamma settings apply to the selected window only. All signals processed by that window ( or



Barco - RHDM-2301 - User manual ____________________________________________________ 53

:

) will be subjected to the gamma settings defined by the customer.

Full functionality description

4.2.5.3 View mode button

Function Description



View mode

 Toggle between different modes.

• Pan&Zoom: Window 1 and window 2 are shown next
to each other (split screen mode). The signals are
cropped (no up scaling or down scaling of the image). It
is possible to pan (select the area of the image that is
viewed) and zoom on the two windows separately. It is
also possible to show the same signal in both windows
(see navigation pad for more info on the pan & zoom
functionality).

On the left side window 1 is shown. The trackball can be
used to move a pointer over the screen. Use
choose between pan and zoom.

• Dual view: Window 1 and window 2 are shown next
to each other (split screen mode). The images are ad­justed to fit the new window borders. The aspect ratio is
maintained during this upscaling or downscaling.

• Single input: The input of the active window is shown.

4.2.5.4 Display and backlight scan mode button

Function Description



Display and backlight scan
mode

 Toggles between the scan modes (applies to both

windows). The scan mode is shown in the status bar.

 Scan mode selection toolbox appears:

The possible selection of scan modes are:

• Non-scanning backlight: The scanning backlight
mode is switched off.

• Scanning backlight: The scanning backlight mode is
activated.

 to

NOTE

:

The “black line insertion” mode cannot be combined with the “scanning backlight” mode. When the
“scanning backlight” mode is selected, the “black line insertion” mode will automatically be changed to
the “deinterlace” mode until the “scanning backlight” mode is switched back to the “non-scanning
backlight” mode.

54 _____________________________________________________Barco - RHDM-2301 - User manual

4.2.5.5 Color working space button

Function Description

Full functionality description



Color working space

 Toggles between different color working spaces.

The color working space applied to the display unit is
shown in the status bar.

 Color workspace toolbox appears:

• Color space: Selection of the color space for the dis-
play unit.

• Primaries: The primaries of the color working space.

• White point: Coordinates of the white point of the
color working space. Range of white points.

• Store: The user can define a custom color working
space. When the value of gamma, the primaries or the
white point is changed, an asterisk will appear behind
the name of the selected color working space. By
pressing Store, the values will be saved into a new color
working space. The name of this color space will be
“custom”, followed by an incremental number.

• Remove: Removes the selected color space. Only
custom defined color working spaces can be removed.

NOTE

:

To change a value, select the item that has to be changed using the trackball. Press ()  or  and
edit the value with the trackball. The value can also be edited by typing the numbers using the numeric
keypad on the control panel (use
Press ()  or  to confirm.

IMPORTANT

The color working space is always selected for both windows simultaneously. After selecting a color
working space, this color working space is maintained, even when other input signals are selected for
window 1 and/or window 2.

IMPORTANT

The primaries can only be adjusted with the “Post production” license of the display unit (RHDM-2301/
P).

Barco - RHDM-2301 - User manual ____________________________________________________ 55

:

:



to cancel erroneous inputs). When the desired value is reached,

Full functionality description

Track ball

Figure 33: Location of buttons to customize the color working space

Customize color working space:

• Press ()  to open the color working space toolbox.

• Navigate with the trackball to the top of the toolbox “Select color space”.

• Press (

• Use the trackball to cycle through the defined color working spaces.

• Press (

• Change the value of an item

NOTE

:

When a color working space has been changed but not yet stored, an asterisk (*) will appear after the
name of the color working space. When the display unit is switched off or placed in hard standby, all
changes will be lost.

Store the customized color working space:

• Navigate with the trackball to highlight the item “store”.

• Press (

)  or ()  to change the color working space.

)  or ()  to confirm the color working space to be customized.

 Navigate with the trackball to highlight the setting that needs to be custom-

ized.

 Press (
 Use the numeric keypad to enter a new value. The values are entered from

left to right. Press (
ball can also be used to change the value of the highlighted item.

 Press (

)  or ()  to select the highlighted item.

)  to reset the value to the previous input. The track-

)  or ()  to confirm the new value.

)  or ()  to store the customized color working space.

• The new color working space is saved according to the format - “custom” followed
by a number – if the original color working space was a predefined color working
space. If the original color working space was a “custom” color working space, then
this “custom” color working space is overwritten with the new settings.

Remove stored color working spaces:

• Navigate with the trackball to the top of the toolbox “Select color space”.

• Press (

56 _____________________________________________________Barco - RHDM-2301 - User manual

)  or ()  to change the color working space.

Full functionality description

• Use the trackball to cycle through all defined color working spaces.

• Press (

)  or ()  to confirm the color working space to be removed.

• Navigate with the trackball to highlight the item “remove”.

• Press (

)  or ()  to remove the selected color working space.

The standard defined color working spaces cannot be removed. When the selected
custom color working space is removed, the next color working space in the list will be
applied to the display unit.

Undo the changes in a color working space that was not stored:

In this case the color working space appears with an asterisk (*) in the status bar on the
top of the screen. Select and press the “remove” option (as described above) in the color
working space toolbox for the color working space that has an asterisk (*). The color
working space is not removed but the settings are restored to the original settings.

4.2.5.6 Scale mode button

Function Description



Scale mode

 Toggles between the scale mode for the selected win-

dow. The scale mode is shown in the status bar for each
window.

Note: When the View mode is set to “maximized”, press-



ing the
signal or change the settings in the status bar. Neverthe­less, the actions are stored in the memory. When return­ing to single mode or the pan&zoom mode, this setting
will be updated.

button will not change the appearance of the

 Scale mode selection toolbox appears: The scale

modes that can be selected are:

• Native: Image is displayed on the screen with its na­tive vertical resolution. The horizontal size depends on
the selection of the aspect ratio (

• Maximize: Image is maximized on the screen. The as­pect ratio as chosen by the aspect ratio toolbox (
maintained.

• OverScan: The inner 96% of the image is shown on
the screen.

• ViewPort: Allows the user to maximize a 16:9 central
portion of a video signal full screen (e.g. to maximize a
letter box content).

).

) is

The scale mode can be chosen dependent on the view mode ().

Composition mode Native Overscan Maximized Viewport Pan&zoom

Single input

Pan&zoom

Dual view

Barco - RHDM-2301 - User manual ____________________________________________________ 57

XXX X

X

X

Full functionality description

4.2.5.7 Aspect ratio button

Function Description



Aspect ratio

 Toggle between possible aspect ratios. The actual as-

pect ratio is shown in the status bar for each window.

 Aspect mode selection toolbox appears: The aspect

ratios that can be selected are:

• Auto: 4:3 aspect ratio is selected for SD signals and
16:9 aspect ratio is selected for HD signals.

• 16:9: Display the image with an aspect ratio of 16:9 on
the screen.

• 4:3: Display the image with an aspect ratio of 4:3 on
the screen.

• Pixel Map: Display the image in the native pixel aspect
ratio. For SD signals this is different than 4:3 (e.g.
720:576, 720:480, …)

58 _____________________________________________________Barco - RHDM-2301 - User manual

4.2.5.8 Safe area marker settings button

Function Description

Full functionality description



Input graphics settings

 Toggle area markers on/off. The area markers indi-

cate the safe area on the screen.

 Safe area settings toolbox appears:

• Safe Areas Enabled: enable/disable all settings

• Crosshairs Enabled: enable crosshair centered on the
screen

Aspect Ratio Marker (ARM)

• Radio buttons (16:9, 4:3, 14:9 and custom): select
the aspect ratio marker according to a standard or cus­tom ratio.

• Aspect ratio: Define a custom aspect ratio marker

Action Safe Area

• Relative to (ARM/Image borders): define the action
safe area relative to the aspect ratio markers or the im­age borders

• Standard (EBU, SMPTE, ITU and custom): select the
action safe area according to a standard or custom de­fined ratio.

• Hor. and Ver. define the action safe area relative to the
aspect ratio markers or image borders as a decrease ex­pressed in percent.

Graphics Safe Area

• Relative to (ARM/Image borders): define the graphics
safe area relative to the aspect ratio markers or the im­age borders

• Standard (EBU, SMPTE, ITU and custom): select the
graphics safe area according to a standard or custom de­fined ratio.

• Hor. and Ver. define the graphics safe area relative to
the aspect ratio markers or image borders as a decrease
expressed in percent.

Settings of the hairlines and shaded areas
HairLine: enable/disable hairlines to define safe area

• Width of the hairline, expressed in number of pixels

• Color of the hairline
Shadow: enable/ disable shadows to define safe area

• Color of the shadow

NOTE

:

The values shown at “Hor” and “Ver” indicate the amount of percent that the area is reduced with
respect to the ARM or image borders at one side of the screen. In total, the horizontal and the vertical
size of the image is reduced by 2 times the value shown at “Hor” and “Ver” respectively.

Barco - RHDM-2301 - User manual ____________________________________________________ 59

Full functionality description

4.2.5.9 Settings of the safe area markers

4.2.5.9.1 How to use safe area markers

Track ball

Figure 34: Location of buttons to set/change safe area markers

• Press (

• Press (
markers, action safe area or graphics safe area need to be defined.

NOTE

:

The settings of safe area markers are set separately for window 1 and window 2.

)  to enable/disable the safe area markers

)  to open the safe area settings toolbox and select which aspect ratio

4.2.5.9.2 How to set crosshairs

• Press ()  to open the safe area settings toolbox

• Move with the trackball to highlight the “Crosshairs Enabled”

• Press (

• If only the crosshairs need to appear on the screen, uncheck all check boxes under
the aspect ratio markers, action safe area and graphics safe area sections in the
toolbox

• Press (

• Press (

)  or ()  to enable the crosshairs if necessary

)  to exit the toolbox
)  enable/disable the cross hairs

4.2.5.9.3 How to set aspect ratio markers

• Press ()  to open the safe area settings toolbox

• To select the aspect ratio:

 Move with the trackball to highlight the wanted aspect ratio marker
 Press (

• To change the custom aspect ratio:

 Move with the trackball to highlight one of the numbers at the “Aspect Ratio”

option

60 _____________________________________________________Barco - RHDM-2301 - User manual

)  or ()  to confirm the highlighted aspect ratio marker

 Press ()  or ()  to select the highlighted number
 To change the number, move with the trackball or type a number with the

numeric keypad

 Press (

restore to the previously selected number

• The aspect ratio markers are set relative to the image borders, except when the
scale mode is “viewport”. In the latter case the aspect ratio markers are defined as
if the input signal has an aspect ratio of 16:9.

)  or ()  to confirm the new value or press ()  to

4.2.5.9.4 How to set action safe area

• Press ()  to open the safe area settings toolbox

• Choose if the action safe are needs to be defined relative to the ARM (Aspect Ratio
Markers) defined above, or the relative to the original image borders:

 Move with the trackball to highlight the wanted option
 Press (

• Choose by which standard the action safe area is defined. For more information
about these standard settings, please check the tables in the addendum. To select
the wanted standard:

 Move with the trackball to highlight the wanted option
 Press (

)  or ()  to confirm the highlighted option

)  or ()  to confirm the highlighted option

Full functionality description

• To change the custom action safe area:

 Move with the trackball to highlight one of the numbers behind “Hor” or “Ver”
 Press (
 To change the number, move with the trackball or type a number with the

numeric keypad

 Press (

restore to the previously selected number

NOTE

:

The values depicted at “Hor” and “Ver” indicate the amount of percent that the area is reduced with
respect to the ARM or image borders.

)  or ()  to select the highlighted number

)  or ()  to confirm the new value or press ()  to

4.2.5.9.5 How to set graphics safe area

• Press ()  to open the safe area settings toolbox

• Choose if the graphics safe are needs to be defined relative to the ARM (Aspect Ratio
Markers) defined above, or the relative to the original image borders:

 Move with the trackball to highlight the wanted option
 Press (

• Choose by which standard the graphics safe area is defined. For more information
about these standard settings, please check the tables in the addendum. To select
the wanted standard:

 Move with the trackball to highlight the wanted option
 Press (

)  or ()  to confirm the highlighted option

)  or ()  to confirm the highlighted option

• To change the custom graphics safe area:

Barco - RHDM-2301 - User manual ____________________________________________________ 61

Full functionality description

 Move with the trackball to highlight one of the numbers behind “Hor” or “Ver”
 Press (
 To change the number, move with the trackball or type a number with the

numeric keypad

 Press (

restore to the previously selected number

NOTE

:

The values depicted at “Hor” and “Ver” indicate the amount of percent that the area is reduced with
respect to the ARM or image borders.

)  or ()  to select the highlighted number

)  or ()  to confirm the new value or press ()  to

4.2.5.9.6 How to change the look of the safe area markers

In the safe area settings toolbox, different settings can be applied to the safe area
markers.

• Hairline: Allows the user to set a hairline to indicate the position of the markers. To
select the hairline:

 Move with the trackball and highlight the “HairLine” checkbox
 Press (

)  or ()  to enable/disable the hair line option

• Shadow: Allows the user to set a shadow on the area that is excluded from the
selection defined by the markers. To select the shadow:

 Move with the trackball and highlight the “Shadow” checkbox
 Press (

• To change the thickness of the hairline:

 Move with the trackball and highlight the “Width” option under the HairLine

checkbox

 Press (
 To change the value, move with the trackball or press a number on the

numeric keypad. The width is expressed in the number of pixels.

 Press (

restore the previously selected value.

• To change the color of the hairline:

 Move with the trackball and highlight the “Color” option under the HairLine

checkbox

 Press (
 To change the color, move with the trackball.
 Press (

the restore the previously selected color.

• To change the color of the shadow:

 Move with the trackball and highlight the “Color” option under the shadow

checkbox

 Press (
 To change the color, move with the trackball.
 Press (

the restore the previously selected color.

)  or ()  to enable/disable the shadow option

)  or ()  to change the width of the hair line

)  or ()  to confirm the new value or press ()  to

)  or ()  to change the color of the hair line

)  or ()  to confirm the new color or press ()  to undo

)  or ()  to change the color of the shadow

)  or ()  to confirm the new color or press ()  to undo

62 _____________________________________________________Barco - RHDM-2301 - User manual

4.2.5.10 Color channel selection button

Function Description

Full functionality description



Color Channel Selection

 Toggle between two states:

• Normal operation: all color channels (Red, Blue and
Green) are selected and used to display the image.

• Selected color operation: only the selected color
channels are used to display the image.

 Signal settings toolbox appears:

• Show all channels: Select all color channels, indepen­dent of the color selection done for Red, Green and Blue.

• Channel selection: Allows the user to select the color
channel (Red, Green or Blue) to be viewed.

• Red: Select the Red channel

• Blue: Select the Blue channel

• Green: Select the Green channel
The selected color channel is shown in its own color. (e.g.

the blue color channel is shown in blue)

• Monochrome: Displays the selected color channel in
grayscale.

4.2.5.11 Monochrome adjustment button

Function Description



Monochrome adjustment

4.2.5.12 Function keys tree

 Toggle between full color (Y’C

(Y’ only).

) and monochrome

bCr

Barco - RHDM-2301 - User manual ____________________________________________________ 63

Full functionality description

64 _____________________________________________________Barco - RHDM-2301 - User manual

Full functionality description

Barco - RHDM-2301 - User manual ____________________________________________________ 65

Full functionality description

4.2.6 Numeric keypad

4.2.6.1 Overview numeric keypad buttons

Figure 35: Numeric keypad buttons

4.2.6.2 Numeric keypad functionality

Description



…

Numeric keys from 0 till 9.







4.2.6.3 Special function key assignment







Exit button. Exit OSD menu and toolbox. Restore value/setting to original value/setting
when a value/setting is selected.

Enter button. Select an option in OSD menu and toolbox. Confirm a selection in OSD
menu and toolbox

Function key assignment

Switch on/off black line insertion mode (Deinterlace mode in OSD menu)

Swap field dominance of input channel 1 of the SDI input board

Swap field dominance of input channel 2 of the SDI input board

The function keys assigned to the buttons of the numeric keypad are connected to the
settings that are available in the OSD menu. Via the numeric keypad, a fast shortcut is
enabled for frequent use of specific functions.

66 _____________________________________________________Barco - RHDM-2301 - User manual

Full functionality description

4.2.7 Navigation pad

4.2.7.1 Overview navigation pad buttons

Figure 36: Navigation pad buttons

4.2.7.2 Navigation pad functionality

The trackball is used to navigate through the menu and to move the pointer on the
screen (when present).

Description







Sel button. Behaves like the left mouse button. This button selects items and confirms
changes of an item. It can also be used to drag or pan (together with the trackball).

Menu button. The OSD menu is opened by pressing the menu button.

Option button. Behaves like the right mouse button. This button calls for the options.

E.g. choose between pan and zoom when working in Pan&Zoom-mode.

Barco - RHDM-2301 - User manual ____________________________________________________ 67

Full functionality description

4.3 Settings OSD menu

4.3.1 Main menu

To enter the OSD main menu: Press () . To exit the OSD main menu: Press () .
The OSD menus close after a timeout of “x” seconds when the timeout functionality has
been activated.

Navigation through the OSD menu structure:

• to highlight a menu section: move the trackball up/down

• to enter the deeper levels in the menu tree: press (

• to return to an upper level: press (

• to select/change a value or an option: Press (
to cycle through the available options. Press again (

the new setting.

•

OSD settings: General settings related to toolboxes, OSD menus and the status bar

•

UMD: Settings related to the Under Monitor Display bar.

•

Input settings: Settings related to input signals shown in window 1 and window 2.

•

Input detection: Settings related to the detection of the input signals.

•

Operation time: Information on the operation time of the different components of

the display unit.

•

Temperature: Temperature reading of different components of the display unit.

•

Status Controller: Fault & Warning list

•

License: Information related to the license and feature packs installed on the dis-

play unit.

•

Activate Admin Mode: Activates the admin mode. When the admin mode is acti-

vated, a new pincode can be generated. Please consult the section “How to change
the license connected to your display unit” for more detailed information.

)  or move to the left with the track ball.

)  or () .

)  or () . Use the trackball

)  or ()  to confirm

68 _____________________________________________________Barco - RHDM-2301 - User manual

4.3.2 OSD settings menu

• Hide after timeout: When checked, the toolboxes and OSD menus will hide/close
after a certain period of inactivity.

• Timeout: Sets the time (expressed in seconds, minimal 10 s, maximal 120 s) of
inactivity during which the toolboxes and OSD menus stay visible/open.

Full functionality description

IMPORTANT

The status bar is considered to be an OSD menu and hides after the same time of inactivity if “hide
after timeout” is checked. Wiggling the track ball activates the status bar.

:

4.3.3 UMD menu

4.3.3.1 UMD main menu

• Visible: When checked, the UMD bar is visible at the bottom of the screen

•

UMD Controlled by: Selects how the UMD bar is controlled:

 Manual: settings of the UMD bar are defined by the settings in the manual set-

tings submenu.

 GPI: settings of the UMD bar are defined by the settings in the GPI settings

submenu and controlled by a closed contact GPI. Please consult the adden­dum for the pinning of the GPI tally control port.

•

Manual Settings: Settings to define the UMD bar manually.

•

GPI Settings: Settings that define the control of the UMD bar by the signal at the

GPI Tally parallel port.

4.3.3.2 Manual settings

• Brightness: Sets the brightness to the specified value. The possible values are:
Full, Half, 1/7, Dark.

Barco - RHDM-2301 - User manual ____________________________________________________ 69

Full functionality description

• Left lamp: Sets the color of the left lamp to the specified value. The possible values
are: Red, Green, Amber, Off

•

Right lamp: Explanation of the setting are the same as for the Left lamp

•

Text: Explanation of the setting are the same as for the Left lamp

4.3.3.3 GPI settings menu

• Brightness

 Controlled by: Selects the pin of the connector that controls the brightness.

The possible settings are: GPI 1, GPI 2, GPI 3 and GPI 4.

 When control is low: Sets the brightness to the specified value when the input

signal at the control pin is low. The possible values are: Full, Half, 1/7, Dark.

 When control is high: Sets the brightness to the specified value when the

input signal at the control pin is high. The possible values are: Full, Half, 1/7,
Dark.

• Left lamp

 Controlled by: Selects the pin of the connector that controls the left lamp. The

possible settings are: GPI 1, GPI 2, GPI 3 and GPI 4.

 When control is low: Sets the color of the left lamp to the specified value when

the input signal at the control pin is low. The possible values are: Red, Green,
Amber, Off

 When control is high: Sets the color of the left lamp to the specified value

when the input signal at the control pin is high. The possible values are: Red,
Green, Amber, Off

•

Right lamp: explanation of the setting are the same as for the Left lamp

70 _____________________________________________________Barco - RHDM-2301 - User manual

• Text: explanation of the setting are the same as for the Left lamp

4.3.4 Input settings

4.3.4.1 Input settings main menu

Full functionality description

Input settings menu contains advanced settings that can influence the visualization of the
selected input signals for window 1 and window 2. The settings that can be changed for
the selected input signals are:

General: Those settings apply for the 2 windows simultaneously

•

Deinterlace mode:

 Deinterlaced: sets the display unit in a mode that the video images are shown

as a sequence of deinterlaced frames.

 Black line insertion: sets the display unit in a mode that the video images are

shown as a sequence of interlaced frames.

IMPORTANT

Disclaimer: In Black line insertion mode the actual gamma and luminance of the image might be differ­ent. This mode is primarily to be used for evaluating motion in the input signal. Further software
releases will improve this.

• Black correction: At dark levels and at low luminance, the grey tracking can have

:

difficulties in showing correct grey.

 At 0%: The color correction of the dark grey levels is not implemented. Con-

trast is maximized.

 At 100%: At the expense of contrast, a color correction is performed to ensure

correct color representation at the dark grey levels.

 Between 0% and 100%: The user can balance the importance of both settings

for customized video processing.

Barco - RHDM-2301 - User manual ____________________________________________________ 71

Full functionality description

• Uniformity: The color uniformity is guaranteed via internal calibration processes.
This uniformity correction is always done. When this box is checked, the luminance
uniformity correction is applied. The luminance uniformity correction can lead to a
slight loss in contrast.

Figure 37: Example of out of gamut indication (red squares have been replaced by yellow
squares for black&white reproducability)

•

Out of gamut indication: Option to verify if parts of the image displayed on the

screen are out of gamut of the selected color working space.
The display unit has a larger color gamut than the broadcast standards. The image/
video which is shown on the screen is in accordance with the primaries and the
white point of the selected color working space. However, if the input signal contains
information which is out of gamut of the selected color working space, or when cer­tain adjustments have been done which drive the shown image out the selected
color working space, the display unit will show the image information faithfully as
long as it is within the gamut of the display unit.
When “out of gamut indication” is checked, the display unit will mark the image data
which is out of the selected color working space by displaying a checkerboard pat­tern. The fields of the checkerboard pattern change to the other color with a fre­quency of 1 Hz. When R, G or B is above 100%, a Red&Black checkerboard pattern
is displayed. If R, G or B is negative, a Blue&Black checkerboard pattern is shown. It
is possible that on a specific part of the image data, one of the primaries is above
100% while another primary is negative. In this case both checkerboard patterns
are shown on top of each other in anti-phase.

First window: These settings apply to window 1 only.

•

Gain: The gain is a multiplication factor that acts directly on the input signal. Please

refer to the chapter “Terminology” and read the section on the Electro Optical Trans­fer Function to understand the impact of this setting on the shown image.

•

Resizer settings: Determines the algorithm that is used to display the luminance

information of the image on a different number of pixels on the screen. See “Resizer
filter menu” for more details.

•

Swap field dominance: The display unit automatically detects the correct field

dominance for interlaced fields. When an error in video transformation would occur,
and the field dominance is not set according to the definition of the detected stan­dard, the field dominance can be swapped manually.

Second window: the explanations of the settings is the same as for window 1.

72 _____________________________________________________Barco - RHDM-2301 - User manual

Full functionality description

4.3.4.2 Resizer settings menu

Preset: sets the sharpness, anti-aliasing, pixel shape and steepness for some dedicated

applications.

•

Video: Settings which are ideal for displaying Video content.

•

Classic: Settings which represent the settings of the OMNITEC generator and the

previous software version of the RHDM.

•

Data: Settings which are ideal for displaying pc content.

•

CGI: Settings which are ideal for displaying Computer Generated Images.

•

Custom: The settings of the resizer are defined by the customer.

In the table below, the settings for each preset are summarized:

Preset Video Classic Data CGI

Sharpness

Anti-aliasing

Pixel Shape

Steepness

Preset

Sharp Normal Normal Sharp

Conservative Balanced Balanced Conservative

Square Point Point Diamond

Linear Linear Nearest Linear

Video Classic Data CGI

Table 1: Resizer settings - presets

Sharpness: Sets the sharpness of the displayed image. Sharp images may introduce

unwanted ringing in the image. The sharpness is thus always a compromise between
“sharpness” of the image and reducing the presence of “ringing”.

•

Sharp (see figure below-d): This setting applies a cut off of the unwanted higher

frequencies in the input signal as much as possible.

•

Normal (see figure below-e): This setting is applied by most display units and

applying this setting results in a moderate cut off of the unwanted higher frequen­cies.

•

Smooth (see figure below-f): This setting introduces a gradual cut off of the higher

frequencies in the input signal.

Anti-aliasing: Selection of algorithms designed to reduce the aliasing effect in processed

images. The filter template for Y’ and R’G’B’ components is used as guideline to meet with
the requirements for the broadcasting community. This setting is a compromise between
“sharpness” of the image and reducing unwanted anti-aliasing effects.

Barco - RHDM-2301 - User manual ____________________________________________________ 73

Full functionality description

• Boost (see figure below-a): Anti-aliasing is set to an extreme value. This setting is
not advised to display video content.

•

Balanced (see figure below-b): This type of anti-aliasing is applied by most display

units and results in a moderate setting.

•

Conservative (see figure below-c): This setting is preferred for video signals and

results in a strong reduction of anti-aliasing effects while preserving good sharpness
of the image.

Figure 38: “anti-aliasing”(a-c) and “Sharpness”(d-f) settings in the OSD submenu
“Resizer settings”

Pixel shape:

• Point: No corrections for the pixel shape are applied.

•

Square: A correction for the square form of the pixels of the LCD panel is taken into

account. This leads to a sharper image.

•

Diamond: A correction for the square form of the pixels of the LCD panel is taken

into account combined with a correction for the case a surface integration has been
done at the side of the camera.

Steepness: Sets the type of interpolation which is used for determining the values at the

pixels of the resized image.

•

Linear (see figure below-a): The value of the intermittent pixels is determined by a

linear interpolation of the sampling points.

•

Super (see figure below-b): The area between two sampling points is divided in 3

equidistant parts. The value at the sub-pixels situated in the middle area is deter­mined by linear interpolation while the value of the sub-pixels situated in the outer 2
areas is equal to the value of the nearest sampling point.

74 _____________________________________________________Barco - RHDM-2301 - User manual

Full functionality description

• Nearest (see figure below-c): No interpolation is applied. Down to sub-pixel level,
the value of a sub-pixel is equal to the value of the nearest sampling point.

Figure 39: “Steepness” settings in the OSD submenu “Resizer settings”

4.3.5 Input detection

4.3.5.1 Input detection main menu

• Sync response: Sets the response time of the sync detection mechanism on a loss
of “sync-locking”.

 Fast: immediate response on a loss of sync locking by blanking the screen.
 Slow: this setting allows a number of frames to be displayed on the screen

without the requirement for sync locking. This setting is especially useful
when different input signals are toggled in a fast way at one of the inputs of
the display unit. Blanking of the screen is avoided with this setting.

•

Single link 1-A: Submenu which allows verification of the input signal and adjust-

ment of the input detection settings for SDI input 1-A.

•

Single link 1-B: Submenu which allows verification of the input signal and adjust-

ment of the input detection settings for SDI input 1-B.

•

Dual link 1-AB: Submenu which allows verification of the input signal and adjust-

ment of the input detection settings in case of a dual link SDI input on 1-AB.

Barco - RHDM-2301 - User manual ____________________________________________________ 75

Full functionality description

4.3.5.2 Single link 1-A & 1-B

• Measured standard: the standard measured by the display unit on the input.

•

Identifier packet: the packet with standard information identified by the display

unit on the input.

To display the video information on the screen, the display unit gives priority to the
standard it detects by analyzing the input signal. If the identifier packet does not
correspond to the measured standard, or if the video signal is not displayed properly due
to a wrong measurement of the standard, it is possible to force the display unit to show
the video signal according to manual settings by checking the “Override signal detection”
option.

automatic detection of the input signal

input signal is set manual: override signal detection is checked

•

Override signal detection: When checked, the display unit will ignore the mea-

sured standard and will display the video signal according to the manual settings.

•

Encoding: sets the encoding of the video signal. This can be RGB or YCbCr.

•

Chroma sampling: sets the sampling of the video signal. Possible sampling options

are: 4:2:2, 4:4:4 and 4:4:4:4.

•

Bit depth: sets the bit depth of the video signal. Possible settings are: 8, 10 or 12.

•

Video framing: sets the video framing of the video signal: Possible options are:

Interlaced, Progressive or Segmented.

76 _____________________________________________________Barco - RHDM-2301 - User manual

4.3.5.3 Dual link 1-AB menu

• Measured standard link A: the standard measured by the display unit on link A.

•

Identifier packet link A: the packet with standard information identified by the

display unit on link A.

•

Measured standard link B: the standard measured by the display unit on link B.

•

Identifier packet link B: the packet with standard information identified by the

display unit on link B.

Full functionality description

To display the video information on the screen, the display unit gives priority to the
standard it detects by analyzing the input signal. If the identifier packet does not
correspond to the measured standard, or if the video signal is not displayed properly due
to a wrong measurement of the standard, it is possible to force the display unit to show
the video signal according to manual settings by checking the “Override signal detection”
option.

automatic detection of the input signal

input signal is set manual: override signal detection is checked

•

Override signal detection: when checked, the display unit will ignore the mea-

sured standard and will display the video signal according to the manual settings.

•

Encoding: sets the encoding of the video signal. This can be RGB or YCbCr.

•

Chroma sampling: sets the sampling of the video signal. Possible sampling options

are: 4:2:2, 4:4:4 and 4:4:4:4.

•

Bit depth: sets the bit depth of the video signal. Possible settings are: 8, 10 or 12.

•

Video framing: sets the video framing of the video signal: Possible options are:

Interlaced, Progressive or Segmented.

•

Swap channels: when checked, the input channels are swapped, i.e. channel A

becomes B and vice versa.

Barco - RHDM-2301 - User manual ____________________________________________________ 77

Full functionality description

4.3.6 Operation time menu

The operation time of the different components are shown in this menu. No warning or
fault is generated when the operation time of one of the components exceeds a certain
value. This menu is mainly for maintenance purposes.

4.3.7 Temperature menu

In this OSD menu, the temperature of different components is shown.

4.3.8 Status controller menu

This menu lists all faults and warnings which have occurred. When a fault occurs, the
“FAULT” LED on the control panel and the “Cal/Err” LED on the bezel will light up red.

To solve a fault or warning, please consult the troubleshooting section in the addendum.

78 _____________________________________________________Barco - RHDM-2301 - User manual

4.3.9 License menu

Full functionality description

• Product serial number: serial number of the product. This number identifies the
display unit unambiguously and is necessary to install the license and feature packs.

•

Current pincode: pincode which activates the license and feature packs assigned

by the user to the display unit.

•

Features: lists the features currently activated on the display unit.

•

Generate new Pincode: menu item to generate a new pincode. Please read the

instructions in the section “how to change the license connected to your display
unit” carefully. This item can only be unlocked by entering the “Admin mode” of the
OSD menu.

IMPORTANT

When a new Pincode is generated, all license and feature packs currently activated on the
display unit will become inactive. As a result, you will not be able to use the display unit
until you have generated a new pincode on my.barco.com. Please follow the instructions in
the section “how to change the license connected to your display unit” to install the new
pincode on your display unit.

:

Barco - RHDM-2301 - User manual ____________________________________________________ 79

Full functionality description

4.3.10 OSD menu tree

80 _____________________________________________________Barco - RHDM-2301 - User manual

Full functionality description

Barco - RHDM-2301 - User manual ____________________________________________________ 81

Full functionality description

4.4 Settings web interface

4.4.1 Home page of the display unit

Figure 40: Web interface – home page

Open a browser window and type in the Address bar: “http://” + the IP address + “/” to
connect to the display unit via the web interface.

Via the web interface, the following settings are available:

• Input selection

• Color processing

• Scan mode

• UMD

• System info

• Power management

• Documentation

• Support

• Admin…

82 _____________________________________________________Barco - RHDM-2301 - User manual

Full functionality description

4.4.2 Input selection page

Figure 41: Input selection page

The input selection page allows the setting of the input selection for window 1 and
window 2, in analogy with the “Input selection” toolbox. The current setting is shown
when the page is opened or refreshed. Press “Apply” to send changes on the web page to
the display unit.

Barco - RHDM-2301 - User manual ____________________________________________________ 83

Full functionality description

4.4.3 Color processing page

Color processing page

84 _____________________________________________________Barco - RHDM-2301 - User manual

Full functionality description

The color processing page allows the settings of several parameters that act on the input
signal selected by window 1 and window 2.

Background: Same setting as the “Background ” image adjustment knob.

•

Gain: Same setting as in the “Input settings” OSD menu.

•

•

Saturation: Same setting as the “Saturation #” image adjustment knob.

•

Hue: Same setting as the “Hue $” image adjustment knob.
Use RGB Channel selection: Activates the RGB color selection functionality. Same

•
setting as in the “Color channel selection” toolbox (

RGB Color selection: Select the color to be displayed. Same setting as in the

•
“Color channel selection” toolbox (

•

Show RGB Color selection in monochrome: Same setting as in the “Color chan-

nel selection” toolbox.

•

YCbCr Channel selection – Monochrome: Same setting as applied by pressing

) the  button.

(

The current setting is shown when the page is opened or refreshed. Press “Apply” to send
the changes on the web page to the display unit.

 ()).

 ()).

4.4.4 Scan mode page

Figure 42: Backlight scanning web page

Activate or deactivate the scanning backlight option. This setting is applied to window 1
and window 2 simultaneously. The current setting is shown when the page is opened or
refreshed. Press “Apply” to send changes on the web page to the display unit

Barco - RHDM-2301 - User manual ____________________________________________________ 85

Full functionality description

4.4.5 UMD page

Figure 43: UMD web page

This web page controls the settings of the UMD bar.

Under Monitor Display

• Visible: Visualize or hide the UMD bar

•

Controlled by: Control the UMD bar manually or via the Tally port (GPI settings).

Manual settings: These settings only apply when “manual” control has been selected.

•

UMD text: Type the text you want to display on the UMD bar

•

Brightness: Select the brightness of the UMD bar (Full, Half, 1/7 or Dark)

•

Text color: Select the color of the text (Red, Green, Amber, Off)

•

Left Tally lamp: Select the color of the left Tally lamp (Red, Green, Amber, Off)

•

Right Tally lamp: Select the color of the right Tally lamp (Red, Green, Amber, Off)

86 _____________________________________________________Barco - RHDM-2301 - User manual

Full functionality description

GPI

Brightness

• Controlled by: Select the pin to control the brightness of the UMD bar (GPI1, GPI2,
GPI3 or GPI4)

•

Signal low: Select the brightness if the signal at the selected pin is low (Full, Half,

1/7 or Dark)

•

Signal high: Select the brightness if the signal at the selected pin is high (Full, Half,

1/7 or Dark)

Left tally lamp

• Controlled by: Select the pin to control the color of the left lamp on the UMD bar
(GPI1, GPI2, GPI3 or GPI4)

•

Signal low: Select the color of the left lamp if the signal at the selected pin is low

(Red, Green, Amber, Off)

•

Signal high: Select the color of the left lamp if the signal at the selected pin is high

(Red, Green, Amber, Off)

Right tally lamp

• Controlled by: Select the pin to control the color of the right lamp on the UMD bar
(GPI1, GPI2, GPI3 or GPI4)

•

Signal low: Select the color of the right lamp if the signal at the selected pin is low

(Red, Green, Amber, Off)

•

Signal high: Select the color of the right lamp if the signal at the selected pin is

high (Red, Green, Amber, Off)

UMD text

• Controlled by: Select the pin to control the color of the text on the UMD bar (GPI1,
GPI2, GPI3 or GPI4)

•

Signal low: Select the color of the text if the signal at the selected pin is low (Red,

Green, Amber, Off)

•

Signal high: Select the color of the text if the signal at the selected pin is high (Red,

Green, Amber, Off)

Press “Apply” to send the new settings to the display unit.

Barco - RHDM-2301 - User manual ____________________________________________________ 87

Full functionality description

4.4.6 System info page

Figure 44: System info web page

The following information is shown on this web page:

• Display name

• Serial number

• Version of the software

• Build – date of the release of the software version

The current setting is shown when the page is opened or refreshed and cannot be
changed.

4.4.7 Power management page

Figure 45: Power management web page

Activates or deactivates the standby functionality (soft standby). Press “Apply” to send
changes on the web page to the display unit.

88 _____________________________________________________Barco - RHDM-2301 - User manual

Full functionality description

4.4.8 Documentation page

Documentation web page
This web page contains the weblink to the documentation explorer at my.barco.com. You

can use the same ID and password as for the licensing of the display unit to access the
documentation online.

4.4.9 Support page

Figure 46: Support web page

On this web page, the contact details of the Barco support teams in EMEA (Europe, Middle
East & Asia) and the United States are given. Do not hesitate to contact them for
technical assistance when necessary.

Barco - RHDM-2301 - User manual ____________________________________________________ 89

Full functionality description

4.4.10 Admin... page

Figure 47: Admin… web page – software update

The Admin… web page is only accessible with a valid user name and password.

• User name: admin

• Password: admin117234

• This web page allows the user to update the software via the ethernet port. Please
consult the “how to upload new software” for more details about this functionality.

90 _____________________________________________________Barco - RHDM-2301 - User manual

Video signal processing

5 Video signal processing

5.1 General

The general way of encoding light captured from a scene (with a camera) to a video
signal, which serves as input for a display unit, can be described by the following steps:

•

Step 1: Light from the scene is captured and transferred to linear RGB. This conver-

sion occurs with a given color gamut and white point.

•

Step 2: The linear RGB signal is transferred to a perceptual uniform R’G’B’ video

signal. This is called the gamma correction.

•

Step 3: The color channels can be encoded. The encoding transforms the R’G’B’

video signal to an Y’C
chroma subsampling is performed. This conversion is not always performed and

unencoded R’G’B’ 4:4:4 can be transmitted as e.g. Dual link HDSDI or 3Gb/s SDI.

Each step is defined by a standard (e.g. Rec.709) The different standards used in the
different steps are listed in the table below:

video signal to optimize stream capacity. Often a 4:2:2

bCr

Step 1
L to RGB

Step 2
RGB to R’B’G’

Step 3
R’G’B’ to Y’C

Table 2: Standards used for video signal generation

SD signals
480i, 576i

480i: SMPTE RP145
576i: EBU 3213

Rec.709 Rec.709 SMPTE 240M

ITU-R BT.601 (Rec. 601) Rec.709 SMPTE 240M

bCr

HD signals
720p, 1080i,
1080p

Rec.709 SMPTE RP145

HD 1035i

Figure 48: From captured light on the scene to the image on the screen

Barco - RHDM-2301 - User manual ____________________________________________________ 91

Video signal processing

On the side of the display, the video signal is converted back to light. The following steps
are done in the RHDM:

•

Undo step 3: When the color channels have been encoded, chroma upsampling and

color channel decoding (Y’C

 The color channel encoding is done automatically (Rec.601 matrix for SD and

Rec.709 matrix for HD). The user only needs to select the type of input signal
(Y'C

 User video settings such as

calculated in this matrix.

NOTE

:

The

Picture

the screen. The Picture setting only drives the power of the backlight, and consequently, the brightness
of the image.

• Undo step 2: The video signal needs to be converted to the linear light domain by
using an
will be given in the following sections. The OETF can be defined by the user:

setting does not have any influence on the conversion of the video signal to the image on

 gamma exponent: from 1.0 to 3.0 in steps 0.05.
 gamma shape: Rec.709, xvYCC, SMPTE 240M, Pure gamma, Extended

gamma, sRGB.

 input footroom and headroom levels.

/R'G'B’, bit depth, chroma subsampling or field/frame/segment type).

bCr

Opto-Electrical Transfer Function (OETF). More details about this step

to R’G’B’) is necessary.

bCr

background, gain, saturation and hue are also

•

Undo step 1: The linear RGB signal is presented on the screen and must be shown

in a given color space (primaries and white point). Because the display typically has
a wider gamut than the intended gamut, a display
needed. The color space can also be defined by the user.

 white point selection: D55, D65, D75, D93, custom in x,y.
 color gamut selection: EBU 3213, Rec.709, SMPTE RP 145, xvYCC, Native, and

Custom - R, G and B primaries in x,y (Option for P-version).

NOTE

:

The fundamentals of the information presented in this chapter can be found in the following
references:

•

Charles Poynton, Digital Video and HDTV, Algorithms and Interfaces, Morgan Kaufmann Publishers,

2007

•

EBU-Tech 3320, User requirements for Video Monitors in Television Production, Version 1.1, Geneva,

May 2008

•

Alan Roberts: Methods of measuring and calculating display transfer characteristics (gamma), BBC

RD 1991/6.

color space conversion is

5.2 General definition OETF

In a video camera, linear light (L) can be encoded into video levels (V) in different ways.
In most cases, light is encoded using a power function (something like V’~L

exponent “a” (0<a<1) is chosen to guarantee a conversion to perceptual uniform space.
The signal is “gamma encoded”, and this is made clear by writing V’ instead of V. In
reality, a pure power function, as presented in the form above, is not used because
analog electronics can not cope with an infinite slope at L=0. A more detailed encoding

a

). The

92 _____________________________________________________Barco - RHDM-2301 - User manual

Video signal processing

(

)

function is used which includes a linear “tail” at low luminance levels, followed by a scaled
and offset power function for higher luminance levels.

There are several L-V’ encoding standards, such as ITU-R BT.709 (Rec.709), SMPTE
240M, sRGB, xvYCC (based on ITU 1361). They all have the form of the transfer function
described below.

To characterize the encoding function, the following parameters are used:

• b

(the voltage up to which the transfer curve is linear)

r

(the slope of the linear part: bs=V/L)

• b

s

(the gamma correction or exponent of the power function)

• g

s

In general, we can write any of these encoding standards with the formula:

b

r

L

0

⎧

V

=

'

⎨

()

1

⎩

Lb

s

g

/1

s

−+

KLK

<≤

b

b

r

b

s

s

L

≤≤

1

where

=

K

()

−

()

(

bb

/1

g

s

/

bbb

srr

/1

g

s

)

1/

−

sr

5.3 Video encoding functions

5.3.1 Rec.709

Figure 49: L-V’ for Rec.709

5.4

⎧

'

=

V

709

⎨
⎩

Barco - RHDM-2301 - User manual ____________________________________________________ 93

L

45.0

099.0099.1

−

L

018.00

<≤

L

1018.0

≤≤

L

Video signal processing

5.3.2 SMPTE 240M

⎧

'

=

V

240

⎨
⎩

5.3.3 sRGB

⎧

⎪

=

'

V

sRGB

⎨
⎪

⎩

5.3.4 xvYCC

0.4

L

45.0

1115.01115.1

−

L

92.12

L

1

⎞

⎛

⎟

⎜

4.2

⎠

⎝

−

L

055.0055.1

0228.00

<≤

L

10228.0

≤≤

L

0031308.00

<≤

L

10031308.0

≤≤

L

Figure 50: L-V’ for xvYCC

xvYCC (based on ITU1361) is identical with Rec.709 in the legal range of Rec.709 (here
the interval [0..1], but it extends the Rec.709 curve also outside the legal range:

⎧

−

⎪

'

1361

⎪

=

⎨

V

⎪
⎪

⎩

94 _____________________________________________________Barco - RHDM-2301 - User manual

45.0

−−

L

4

L

5.4

45.0

−

L

099.0)4(099.1

−<≤−

L

099.0099.1

004.025.0

<≤−

L

018.0004.0

≤≤

L

33.1018.0

Video signal processing

5.4 Effective gamma

The Rec.709 encoding equation assumes a linear tail and a power function with an
exponent 0.45. However, because of the linear offset and scaling, it is not correct to state
that the Rec.709 encoding equation is described by a gamma of 0.45. The Rec.709
encoding equation is best fitted with a pure power function with an exponent 0.52 (see
figure below). We call this “best fit” the “

effective gamma”.

The Rec.709 encoding equation fitted with a power function

5.5 Rendering intent

It is important to realize that the following statement is wrong:

“The video signal must be decoded at the display side in such a way to guarantee a linear
system transfer (a linear relation between the scene luminance and display luminance,
called ‘scene-to-screen’ or ‘end-to-end’ transfer)”

The mathematical inversion of the Rec.709 encoding equation that guarantees a linear
end-to-end luminance transfer is:

V

709

'

709

5.4

+

099.0'

099.1

1

45.0

⎞
⎟

⎠

V

709

018.0'0

<≤

V

709

1'018.0

≤≤

⎧
⎪

⎪

L

=

⎨

V

⎛

⎪

⎜

⎪

⎝

⎩

However, because of the linear offset, this inverse does not correspond to an effective
gamma of 2.2, but rather to an “effective gamma” of around 2.0 (as discussed in the
section “effective gamma” and illustrated in the figure below).

Barco - RHDM-2301 - User manual ____________________________________________________ 95

Video signal processing

Figure 51: The inverse of the Rec.709 encoding function fitted with a power function

But a gamma of 2.0 sounds very strange in the broadcast world! All these years, video
looked good on CRTs, where people are used to values of gamma of 2.2, 2.5, or even 2.8,
but never 2.0. Thus this mean that we have been looking at non-linear end-to-end
transfer?

Indeed, according to CRT physics, the cathode ray tube transfer characteristic has a
gamma of 2.5. An early EBU specification actually uses a number of 2.8. However, a later
in-depth characterization of the gamma of a CRT (Alan Roberts: Methods of measuring
and calculating display transfer characteristics (gamma); BBC RD 1991/6) yields values
closer to 2.2-2.3.

So yes, in fact the scene-to-screen transfer has not been linear from the start. With an
effective encoding gamma of 0.52, and an effective display gamma of 2.2-2.5, the
system transfer is somewhere in between 1.1-1.3. A recent EBU recommendation
(EBU.Tech.3320) actually specifies the value of 2.35 for new reference (grade 1)
monitors.

Why does this non-linear scene-to-screen transfer give such good results?

The scene and the display have very different viewing conditions. Video monitors are

2

typically calibrated at a luminance of about 100 cd/m

, and viewed in dim environments.
A scene can have a luminance which is 100-1000 times larger (the sun!) than the
luminance which can be produced by the display. These different conditions give rise to
perceptual differences: a video shown on a display with a linear end-to-end transfer
function will look very pale and unsaturated. Therefore a

“transfer gamma” (end-to-

end) with an exponent higher than 1 is desired (around 1.2). This situation is referred to
as “rendering intent”: the video is encoded in such a way (exponent 0.45, effective
gamma 0.52), that when a CRT decodes it (with a gamma of 2.2-2.5), the end result has
an end-to-end transfer gamma of around 1.2.

96 _____________________________________________________Barco - RHDM-2301 - User manual

Video signal processing

5.6 Selection of OETFs in the RHDM

OETF means “Opto-Electric Transfer Function”. An OETF defines the way the input signal
(electric) is transferred to luminance at the display side. The video encoding functions
explained above are examples of OETFs.

The following OETFs can be selected by the user:

•

Rec.709

• SMPTE 240M

• sRGB

• xvYCC: The xvYCC function is identical to Rec.709 in the legal range of values. How­ever, xvYCC can encode headrooms and footrooms that give rise to out-of-gamut
colors. With the wide gamut of the display unit, these colors are displayed correctly
on screen.

•

Pure Gamma

• Extended Gamma: This option is an extension of the “pure gamma” OETF to head­room and footroom, with the same intent as xvYCC.

In addition to these possible OETFs, the user can also select the gamma exponent
(ranging from 1.0 to 3.0, with a default value of 2.35 as per EBU Tech.3320). This
gamma exponent can be understood as the resulting

“effective gamma” of the display.

γ

The simplest function is the “pure gamma”, where L-L

~Vγ. But because of differences

0

between CRT and LCD technology, using a pure gamma function in LCDs will result in
crushed blacks. The users would need to increase the background offset (black level) in
order to set up the monitor according to the Pluge pattern. But this increases the black
level and decreases the available contrast range of the display.

Therefore the RHDM uses the following OETF concept:

• Invert the encoding equations (Rec.709, xvYCC, sRGB or SMPTE240M) exactly, pre­serving the “linear toe”.

• Make sure that the “rendering intent” is preserved, which means that the resulting
effective gamma is equal to the gamma selected by the user (default 2.35 as per
EBU 3320 recommendation).

• Take the limited LCD contrast into account so that the dark levels are perceptually
discernable.

This implementation avoids crushing of blacks that would be exhibited by using a pure
gamma function and eliminates the need to set the video offset. The rendering intent

used in the display unit ensures that at a luminance level of 100 cd/m

2

the lowest step in

the Pluge pattern are just noticeable.

Detailed example: Pure gamma

The OETF shown below describes the translation of the electric signal to the video drive
level. This formula applies for each color.

The light output (luminance) Y
the maximum light output Y

factor. The color factor is the input voltage V
voltage V

i

. The LCD screen is not able to suppress all the light coming from the

inrw

backlight trays. There is still some light (Y

i

for each color (i=R,G,B) of an ideal screen is related to

i

(for each color) multiplied by the gamma corrected color

max

i

(or Yi’) weighted by the reference white

in

i

) emitted by the LCD screen when V

0

This remnant emission of light is called display black level. The video gain G is a way to
enhance the light output of the image, without influencing the black level of the image.

i

in

= 0.

Barco - RHDM-2301 - User manual ____________________________________________________ 97

Video signal processing

The gain is expressed in the formula in %. Background B is the user control that allows
the user to shift the black level (e.g. to see the content in dark regions of the image
better) of the image. Picture P is the user control that drives the power of the backlights.
From this equation you can readily see that Picture has an influence on the black level
that is set by the Background and the dark offset of the LCD panel.

⎡

⎛

iiii

⎜

)(

−+= B

YYYPY

0max0

⎢

⎜

100

⎝

⎣

NOTE

:

Increasing G or B will result in clipping of the highlights.

i

VG

in

i

V

inrw

γ

⎤

⎞
⎟

+

⎥

⎟
⎠

⎦

, i = R,G,B

98 _____________________________________________________Barco - RHDM-2301 - User manual

6 Terminology

The terminology used throughout the manual is described in detail in this chapter. More
information related to the operation and settings of the display unit can be found and is in
most cases extended with background information that can be relevant for the user to
understand the capabilities of the display unit.

Aliasing

Aliasing of a displayed image occurs when frequencies higher than half of the sample
frequency are used in the image (Nyquist theorem).

Background

The background setting is similar to the brightness setting on a CRT display unit.
Background adjusts the black level of the display unit. Setting the background too low,
information in the dark parts of the image is lost and possible information in the
headroom of the video signal can become visible. Setting the background too high will
lead to the whole image resting on a grey pedestal and the bright levels being clipped.
The dark levels becoming visible in the foot room of the video signal. The value of the
background control is expressed in number of bits. The actual light output at the 100%
drive level depends on the setting of the picture control. The value of the background is
equivalent to video offset and is expressed in 8-bit steps.

e

100 %

v
i
r

d
D

C
L

clipping
bright levels

Terminology

+

Visualize
super bright

-

Visualize

Black

super dark

offset

Black
0 %

clipping
dark levels

White
100 %

Video signal

Figure 52: Background control

Black body locus

Line in the x,y color space that determines the color of the light that is produced by a
perfect black body radiator at different temperatures.

Black level

The black level is the amount of light that is emitted by the LCD panel when it displays
code 0. The black level is the minimal achievable light output technically possible by the
LCD panel.

Clipping

Clipping occurs when a transformation pushes the video signal out of the available driving
range of the LCD or the backlights. Clipping can occur in the highlights when the

Barco - RHDM-2301 - User manual ____________________________________________________ 99

Terminology

background is set too high. Clipping in the lowlights can occur when the background is set
too low.

Color working space

The color space is the full range of all different colors that are observable by humans. The
color space is determined by the tristimulus variables X, Y and Z or with corresponding R,
G and B values. The color space is often represented in a CIE[x,y] 2-dimensional
chromaticity diagram.

Color sub-sampling (chroma sub-sampling)

Color sub-sampling refers to the number of bits that are available to represent the Luma
and the Chroma of each pixel in 2x2 array. The notation 4:2:2 means that of the 2x2
pixels, each has a different Luma sample (4 samples), and that C

same two by two (the C

Gamut

The gamut is a set of colors in the X,Y,Z color space that can be generated by the display
unit. In the 2-dimensional x,y section, the gamut consists of all colors within a triangle
defined by the three primaries (red, green and blue).

Headroom

The headroom is defined as the region of the signal input code that exceeds the value of
reference white. For 10 bit signals, the headroom is defined between level 940 and level

1019.

and Cr value changes every two pixels).

b

(Cr) samples are the

b

Hue $

The hue control is similar to the hue setting on a CRT display unit. Hue affects the C

components of the Y’CBCR according to the following formula:

C

R

'

αα

αα

⎤
⎥

)sin()cos(0

⎥
⎥

)cos()sin(0

⎦

Y

⎤

⎡

⎥

⎢

C

B

⎥

⎢

⎥

⎢

C

R

⎦

⎣

12

C

R

Saturation

Y

⎡
⎢

C

B

⎢
⎢

C

R

⎣

The value of the hue control is expressed in degrees.

Figure 53: Hue and saturation control

⎡

⎤

⎢

⎥

⎢

⎥

⎢

⎥

⎣

⎦

Y'

C

B

Hue

001'

−=

and

B

Input signal description

The names of the input signals that are shown in the status bar or in the “select input”
toolbox are composed in the following way:

100 ____________________________________________________Barco - RHDM-2301 - User manual