THOMSON DBE 4120 Configuration Manual

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DBE 4120
MPEG-2 Encoder System for Contribution

Configuration guide

THOMSON broadcast system reserves the right to change product characteristics
without prior notice.
This document and any updates and/or supplemental information, including any copies
thereof, cannot be reproduced, neither communicated to a third party, without written

© 1999
THOMSON
broadcast systems

Product overview

DBE 4120
MPEG-2 Encoder System for Contribution

Key features:

Ä 4:2:2 and 4:2:0 high performance

compression

Configuration
guide

DBE 4120 features advanced MPEG-2

Ä Maximum interfacing flexibility

compression to provide the best
quality video encoding and
architecture flexibility for matching

Ä Helper Channel capability
Ä Extensive audio handling

the variety of I/O interfacing with
video sources and contribution
networks

Ä Low and ultra-low delay modes

capability

Ä VBI lines transport
Ä Scrambling capability

The DBE 4120 is a single service encoder, which performs the compression of video and audio
sources. The provision of extensive hardware and software options allows customising and
upgrading the system in order to match with customer requirements.

The video source is a SDI signal for the standard model but a composite video (PAL, SECAM or
NTSC) source can also be provided as an option. Video compression is achieved either in
MPEG-2 4:2:0 MP@ML or 4:2:2P@ML standard.

A TS input option allows daisy chaining of several encoders in order to multiplex related services
within the same output transport stream. Two audio channels, which can be de-embedded from
the SDI stream or received through separate analogue or AES/EBU audio sources, are
processed. Audio compression is performed according to the ISO/IEC 11172-3 layer 2 standard.
On option, up to eight additional stereo audio can be multiplexed with the SDI primary signals, as
well as data.

The DBE 4120 has been designed as a 2 RU height, 19" sub-rack, easy to install and operate. A
range of network interfacing options is proposed for PDH or SDH network interconnection with
ATM mapping. Thanks to its user-driven menu, it can be easily controlled and monitored locally
from the front panel keypad, or remotely through an Ethernet link with the DBS 2930
management software or with an SNMP agent in an NMS environment.

DBE 4120 Functional Block Diagram

Interface

Interface

Alarms

Options

IF

Modulator

PDH

or

SDH

SDI

PAL,
SECAM,

or NTSC

2 stereo or 4 mono

analogue audio

2 AES/EBU

audio

4 AES/EBU audio

4 AES/EBU audio

TS ASI

Data

Ethernet

Composite

video

AES
Input

4:2:0 &

RS 232 Data

LCD/Keypad

4:2:2

MPEG2

Video

Encoding

VBI

Processing

Audio

Encoding

Audio

Audio

Encoding

Encoding

Interface

ASI

Data Multiplexing

ATM Network

Scrambling

Control

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DBE 4120
MPEG-2 Encoder System for Contribution

Configuration
guide

Benefits

4:2:2 and 4:2:0 high performance compression

Thanks to its second generation Thomson chipset, designed in order to improve the
performance encoding, the DBE 4120 encoder features advanced processing
capabilities such as adaptive video pre-processing and new compression features
such as five-level hierarchical motion estimation, far-ranging motion vector calculations
and two-pass rate control, resulting in valuable savings of bit rate for the same video
quality. Furthermore, when picture content must be preserved, the encoding can be
simply changed by software controlled switching from the 4:2:0 format into the 4:2:2
format.

Maximum interfacing flexibility

Besides the basic encoder configuration, four extension slots and software options are
available such that a specific combination of cards and software additional functions
can be used to tailor a customised configuration: composite video input, addition of
analogue or AES/EBU audio channels, ATM interface for PDH or SDH networks, data
and VBI multiplexing for broadcast customising, scrambling for content protection, etc.

Helper Channel capability (option)

The Helper Channel software option allows minimizing the loss in picture quality when
several encoding-decoding processes occur in cascade. The Helper Channel
information is carried by using one VBI line. Automatic detection of re-encoding data
set is achieved.

Extensive audio handling (option)

Up to eight additional audio signals can be compressed. These are embedded within
the incoming SDI signal or external AES/EBU coded audio. Overall encoder capability
may be achieved with 10 digital stereo audio channels.

Low and ultra-low delay mode capability (option)

Delays in live interviews between different locations can be optimized with the low
delay mode option, providing less than 290 ms end-to-end delay, and now down to 140
ms with the ultra-low delay mode.

VBI lines transport

The DBE 4120 encoder provides the capability of transporting VBI lines from either 50
or 60 Hz, SDI or analogue sources system.

Scrambling capability

DVB compliant common scrambling is provided as an option, in order to preserve the
content and the access, as may be required for instance for post-production.

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DBE 4120
MPEG-2 Encoder System for Contribution

Features and Capabilities

Video

SDI video input
Selectable vertical sub-sampling for format conversion from 4:2:2 to 4:2:0
300 m cable equalization
Horizontal re-sampling (352, 480, 528, 704, 720)
3 :2 pull down detection (60 Hz only)

Optional:

Composite video input for PAL, SECAM and NTSC (hardware option)

Audio

Two stereo or four mono analogue audio
Or two stereo or four mono digital audio extracted from SDI input
(synchronous 48 KHz 20-bit audio)

Optional:
Four additional stereo audio encoder (AES/EBU or SDI) (hardware option)
Two stereo audio AES/EBU audio inputs (hardware option)
Four additional AES/EBU audio (hardware option, exclusive of composite option)

Configuration
guide

Data (software option)

RS 232 data link (software option); Data rates: from 1200 to 57600 bauds
Protocol: transparent
TS input

VBI processing (software option)

- From 50 Hz analogue (PAL, SECAM) source: CEEFAX B, magazine and/or subtitles, 50 Hz
VITC, VPS, Any Monochrome VBI line

- From 50 Hz SDI source: CEEFAX B, magazine and/or subtitles, 50 Hz DVITC, WSS, VPS
(digitized waveform VBI only), FCP, AFD, Any Monochrome VBI line (digitized waveform VBI
only)

- From 60 Hz analog (NTSC) source: Any Monochrome VBI line

- From 60 Hz SDI source: VBI FCP, Any Monochrome VBI line (digitized waveform VBI only)

Compression

Video:

Compliant with MPEG-2 4:2:0 MP@ML and 4:2:2 P@ML as defined by ISO/IEC 13818-2
Bit rate of 1 to 15 Mbps for 4:2:0 and 4 to 50 Mbps for 4:2:2
Adaptive Field/frame DCT coding
Motion compensation: Hierarchical, Field frame

Five-level hierarchical motion estimation
Far-ranging motion vector calculations

Two-pass rate control (except for ultra-low delay mode)
M=1, 2, 3 (0, 1, 2 B-frames)
GOP size N multiple of M, N≤24
Non linear adaptive Quantization (taking into account Chrominance)
Intra and non Intra Quantization Weighting Matrix

Optional:
Low and ultra-low delay modes (software option)

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DBE 4120
MPEG-2 Encoder System for Contribution

Configuration
guide

Audio:

Compliant with ISO/IEC 11172-3 standard, MPEG-1, Layer II, sampling rate 48 KHz
Bit rate from 64 to 384 Kbps
Embedded DSC audio according to SMPTE 272-A (level A, 48 KHz)
Mode: Stereo, Joint stereo, mono and dual mono

Multiplexing

Compliant with ISO/IEC 13818-1 and ETS 300429
Bit rate from 1 to 50 Mbps
DVB & ISO tables inserter (PAT, PMT, TDT, SDT, EIT, NIT with optional satellite descriptor)

Optional:
TS ASI input

Modulation (optional)

QPSK, 8PSK and 16QAM Modulation with bit rate from 1.5 to 28 Mb/s
DVB compliant ETS 300 421 and ETS 301 210
IF (50 to 90 MHz) output
L-band output (950 to 1550 MHz) for local monitoring
External modulation can be provided as an alternate solution

Network interface (optional)

ATM/PDH or SDH network couplers with either electrical (PDH 34 or 45 Mbps) or optical (SDH
155 Mbps, single mode or multi-mode) interfaces.

Access Control (optional)

DVB common scrambling with fixed control words
(No need for external EMM/ECM injectors)

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DBE 4120
MPEG-2 Encoder System for Contribution

Configuration
guide

Management

The DBE 4120 management can be achieved locally through the front panel keypad and LC
Display, or remotely from the TBS supervision system.

The local management performed through the front panel menu-driven interface allows to select
the proper video input (SDI, PAL, etc) and the profile (4:2:2P@ML or MP@ML) to control the
transmission parameters and to recall, store or erase up to 12 pre-set configurations. Also
controlled through the encoder front panel interface are the basic parameters of the encoder
(alarm and bit rate monitoring, reboot, delay mode, scrambling mode) and that of the optional
system components (network interface)

For remote management two possibilities are offered, depending of the specific requirements:
either with the DBS 2930 software dedicated to MPEG-2 system, or with as an embedded
SNMP agent within a Network Management System environment.

User Interface

User selection with simple front panel interface
GUI on remote station
(Software unlocking of software options)

DBE 4120 Management Software: Example of service display

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DBE 4120
MPEG-2 Encoder System for Contribution

Product outlook

In its standard version, the DBE 4120 features the following inputs:
(see below rear panel arrangement)

- One SDI digital video (with 2 AES/EBU de-embedder)

- Two stereo or four mono analogue audio

On option, it can be complemented with back-mounted additional hardware modules:

- in extension slot 1: a card for composite video input or for 4 additional AES/EBU
audio

- in extension slot 2: a card for 4 additional audio channels, or integrated modulator, or
ATM network interface

- in extension slot 3: a card for contact closure alarming

- in the extension slot 4: a card for two AES/EBU audio channels

(see also configuration information)

Configuration
guide

Front Panel

Rear Panel

SDI IN SERIAL 1 LAN SERIAL 2 PCR OUT

ANALOG

SSEBAUDIO IN

RS 232/485 10BaseT RS 485

Slot 4 Slot 1
Slot 3

TS ASIIN OUT 1 OUT 2 OUT 3

Slot 2

I
O

Ph

N

T

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Technical Specifications

Video

- Inputs
SDI (10-bit accuracy)
Composite video PAL, SECAM, NTSC

- Pre-processing
Frame re-synchronizer
Image re-sizing filters full to ½ or ¼ resolution
3 :2 pull down

- Video encoding
MPEG2 4 :2 :2 P@ML and MP@ML
Bit rate range of 1 to 50 Mbps
Horizontal 720, 704, 544, 480, 352 pixels
Vertical (625 line) 576, 288 (525 line) 480, 240 lines

- VBI (processing)
From 50 Hz analog (PAL, SECAM) source: CEEFAX B, magazine and/or

subtitles, 50 Hz VITC, VPS, Any Monochrome VBI line
From 50 Hz SDI source: CEEFAX B, magazine and/or subtitles, 50 Hz

DVITC, WSS, VPS (digitized waveform VBI only), FCP, AFD, Any
Monochrome VBI line (digitized waveform VBI only)

From 60 Hz analogue (NTSC) source: Any Monochrome VBI line
From 60 Hz SDI source: VBI FCP, Any Monochrome VBI line (digitized
waveform VBI only)
Up to 8 transparent VBI lines
Helper channel on one VBI line (option)

DBE 4120
MPEG-2 Encoder System for Contribution

Configuration
guide

Audio

- Inputs

- Audio encoding

Data

- RS-232

- ASI input

Up two stereo or four mono audio extracted from SDI
Two stereo analogue audio balanced 600 Ω /18 KΩ
Up to 10 AES/EBU digital audio on XLR (with SDI only)

ISO/IEC 11172-3 standard compliant, MPEG-1, Layer II
48 KHz sampling rate
18-bit accuracy

Transparent data interface

TS packets in data burst or data packet modes

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Encoder

- Low delay mode
290 ms end-to-end

- Ultra-low delay mode
140ms end-to-end

- Test generation
Colour bars
Audio tone (2.1kHz)

- Encryption
DVB Common Scrambling with fixed words

- Helper Channel
Re-encoding data set transmissions in one VBI line

Modulation

- Input
Serial ASI for DVB TS

- Outputs
IF 50 – 90 MHz
L-Band 950 – 1550 MHz (for IRD monitoring)
C-Band and Ku-Band on option

- Modulation
QPSK bit rate 1 to 50 (25) Mbps
8 PSK and 16QAM on option

DBE 4120
MPEG-2 Encoder System for Contribution

Configuration
guide

ATM network interface option

- PDH Electrical Interfaces: Comply with ITU-T G 703

Data rate: 34.368 Mbps (E3); 44.736Mbps (DS3)

- SDH Single-Mode Optical Interfaces: Comply with ITU-T G 957 S1.1 (short haul)

Data rate: 155.520 Mbps (STM-1 & STS3c)

- SDH Multi-Mode Optical Interfaces: Data rate: 155.520Mbps (STM-1 & STS3c)

Fiber rate: 62.5/125/0.275 NA

Tributary effective bit rate versus network bit rate:

Network bit rate (Kbps) Tributaries effective bit rate (Kbps)

34,368 (E3) 29,131

44,736 (DS3) 37,967

155,520 (STM-1) 54,000 (within 128,653 Kbps.)

Control Interfaces

- Front panel
Full control available using front panel LCD and keypad
12 user pre-set configurations

- Ethernet
SNMP (MIB available)
DBS 2930 control & command software

- RS-485
Remote control port for third party equipment

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Power

Auto ranging 100-240 Vac, 50/60 Hz universal power supply
100 to 150 W, depending on equipment population

Physical

Width 483mm height 88mm depth 600mm (enclosure)
Weight 16 kg standard configuration

Operating Conditions

Ambient temperature 0°C to 45°C
For fixed or mobile environments

Compliance with Standards

MPEG-2 implementation guidelines (DVB A001)
Channel coding and modulation for Satellite (ETS 300421)
Service Information (ETS 300 468, DVB A005)
Common Scrambling and Conditional Access Guidelines (ETR 289)
Asynchronous Serial Transport Stream Interface (prEN 50083-9)

DBE 4120
MPEG-2 Encoder System for Contribution

Configuration
guide

CE marked in accordance with ECC low voltage and EMC directives
(EN60950, EN55022, EN50082-1)

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Ordering Information

- DBE 4120 basic configurations:

Models Descriptions

N4120220AF Contribution 4120 Encoder, MP@ML and 422P@ML compression

220V AC Power Supply, V6.2

N4120220BF Contribution 4120 Encoder, MP@ML and 422P@ML compression

220V AC Power Supply, Without scrambling capacity, V6.2

N4120048AF Single Service Encoder, MP@ML and 422P@ML compression

48V DC Power supply, V6.2

N4120048BF Single Service Encoder, MP@ML and 422P@ML compression

48V DC Power supply Without scrambling capacity, V6.2

- DBE 4120 hardware options:

Models Descriptions

N41H034EAF ATM Network Interface, Electrical, 34 Mbit/s , V6.2
N41H045EAF ATM Network Interface, Electrical, 45 Mbit/s, V6.2
N41H155MAF ATM Network Interface, Optical 155 Mbit/s, Multi-mode Fiber, V6.2
N41H155SAF ATM Network Interface, Optical 155 Mbit/s, Single-mode Fiber, V6.2
N41HAMUBAF 4 additional audio inputs (AES/EBU or embedded in SDI) , V6.2
N41HATADAF 2 AES/EBU audio inputs, V6.2
N41HDPSNAF Composite video input, V6.2
N41HMODUAF Integrated modulator, V6.2
N41HMSDLAF Closure Contact Alarming , V6.2

DBE 4120
MPEG-2 Encoder System for Contribution

Configuration
guide

- DBE 4120 software options:

Models Descriptions
N41SD56KAF Data injection through RS 232, V6.2
N41SDVCFAF DVB Common Scrambling/Fixed. Control Words, V6.2
N41SHCHNAF Helper Channel , V6.2
N41SLODEAF Low-delay Mode, V6.2
N41SMODCAF Newtec Modulator Control , V6.2
N41STS1NAF ASI TS Input / PCR Output , V6.2
N41SVB1PAf VBI Processing , V6.2

- DBE 4120 upgrade kit options:

Models Descriptions
N4120830AE Software upgrade kit from V6.0 to V6.1
N4120830AF Software upgrade kit from V6.1 to V6.2

- DBE 4110 documentation option:

Models Descriptions
N4120M00KF French edition of operation handbook - Release 6.2 (English version

supplied with equipment)

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Configuration information

DBE 4120
MPEG-2 Encoder System for Contribution

Configuration
guide

Hardware options:

ATADI Card for 2 AES /

ANALOG

MSDL Card for Closure Contact Alarming

(N41HMSDLA)

S/W options:

ASI auxiliary TS input (N41STS1NA)

DPSN Card for composite video (N41HDPSNA)
or AMUSE card for 4 additional AES/EBU audio (N41HAMUBA)

EBU

audio (N41HATADA)

SDI IN SERIAL 1 LAN SERIAL 2 PCR OUT

RS 232/485 10BaseT RS 485

Slot 4 Slot 1
Slot 3

VBI Processing (N41SVB1PA)
Data Injection (N41SD56KA)
Low Delay and Ultra-low Delay (N41SLODEA)
DVB Scrambling / Fixed Control Word (N41SDVCFA)
Modulator Control (N41SMODCA)
422P@ML Video Encoding (N41S422PA)

SSEBAUDIO IN

ATM PLE 34 (N41H034EA)
or ATM PLE 45 (N41H045EA)
or ATM PLO 155 SM ( N41H155SA)
or ATM PLO 155MM (N41H155MA)
or 4 AES/EBU audio (N41HAMUBA)
or Integrated modulator (N41HMUDUA)

TS ASIIN OUT 1 OUT 2 OUT 3

Slot 2

I
O

Ph

N

T

Hardware Configuration Possibilities

Slot
number

Standard
Configuration

Standard Configuration + H/W optional possibilities

1 2 3 4

SEEB Card

Slot1

1 SDI
2 stereo or 4

mono analogue
audio

1 SDI
2 stereo or 4

mono analogue
audio

Composite Video

1 SDI
2 stereo or 4

mono analogue
audio

1 SDI
2 stereo or 4

mono analogue
audio

4 audio Composite Video 4 audio

Slot2 4 audio 4 audio ATM PLE

(34 or 45 Mbps) or
ATM PLO
155 Mbps
(SMF or MMF)

Slot3

Closure Contact
Alarming

Slot4 2AES/EBU audio

(as alternative
audio sources)

Closure Contact
Alarming

2AES/EBU audio
(as alternative
audio sources)

Closure Contact
Alarming

2AES/EBU audio
(as alternative
audio sources)

1 SDI
2 stereo or 4

mono analogue
audio

ATM PLE
(34 or 45 Mbps) or
ATM PLO
155 Mbps
(SMF or MMF)
Closure Contact
Alarming

2AES/EBU audio
(as alternative
audio sources)

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p.12 of 12