MXTS - A Multi-Programme DVB Audio Codec

MXTS – combines MPEG coding and multiplexing for audio broadcast over DVB
networks.

The new multi-channel /multi-programme system, MXTS, greatly simplifies the distribution of audio programmes over DVB networks. Each system consists of a multiplexer and a variable number of encoders or converters built into a 19” subrack. These encoders/convertors are separate interface modules, which can either encode analogue or digital audio or convert MPEG coded audio or even a multi-channel signal such as Dolby Digital into an ASI compliant stream. Up to 10 stereo programmes can be processed in one 19” subrack, which also contains a controller and redundant power supply. The MXTS output signal is available both as DVB/ASI signal or G.703 signal for E1 links.
MXTS is a universal system for a wide range of applications: The MXTS supplies households with a signal over DVB satellites, it can feed FM transmitters with programmes accompanied by RDS data and it allows broadcasters to replace ADR satellite applications.

Applications

• Distribution of audio signals over satellite, terrestrial DVB-T distribution and multi- channel provision in CaTV headends.
• Audio Broadcast Distribution
• Contribution from remote and local audio sources
• Multi-channel STL
• Back-up of FM networks over satellite
• To feed local audio programmes into CaTV headends

Main Features

• Processing of MPEG encoded audio from X.21 interface (X module)
• Processing of analogue and digital audio formats in the encoder (A modules)
• Ancillary Data processing within MPEG stream per audio encoder module
• 0 stereo programmes maximum, modular upgrading
• Audio coding standards and rates MPEG1 LII acc. to DVB
• Dolby Digital Pass-Through for 5.1 format (DD module)
• 1 optional data signal per programme, multiplexed as Private Data (individual PID)
• Terminal control and programming
• Dual outputs for both E1 and DVB/ASI networks
• Alarm relay loops, assigned via software
• Large LCD with keys shows status and alarm messages
• 100+ programmes by combining MXTS frames with external TS multiplexer

Mechanics

• Basic frame 19” subrack with 3 RU, approx. depth 360 mm
• Dual redundant AC power supply, hot swap modules
• 10 slots for stereo programme modules
• Output dual E1 (G.703) and ASI module
• All interface modules are inserted from the rear
• Modules carry the connectors on their front panel

Versions

Basic frame:

19” 3 RU, with dual AC psu modules, 10 slots for stereo programme cards, with front panel equipped with LCD, RS232 control connector, Dual E1 plus dual ASI output card

Input modules:

• X module, X.21 interface module with separate X.21 output for monitoring with external decoder, all DVB rates, with RS232 Ancillary Data insertion acc. to ITU 11172-3 (IRT protocol optional)
• AA module, analogue stereo encoder module, MPEG1 LII, DVB rates and formats, with RS232 Ancillary Data insertion acc. to ITU 11172-3 (IRT protocol optional)
• DA module, digital AES/EBU stereo encoder module, MPEG1 LII, DVB rates and formats, with RS232 Ancillary Data insertion acc. to ITU 11172-3 , (IRT protocol optional)
• DD module, Dolby Digital Pass-Through module, 5.1 format with 448 kbit/s,
  with RS232 Ancillary Data insertion acc. to ITU 11172-3 , (IRT protocol optional)

Options

• Private Data (RDS) Option, additional data channel via RS232 port async, with individual PID, available for X module, AA, DA and DD modules
• Ancillary Data acc. to UECP protocol (RDS)
• SNMP interface
• Web Server for control and monitoring
• Internal monitor MPEG decoder including headphone output on each separate module