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Australian Standard for Digital Television: Scope & General Overview

This document outlines the Australian Standard for Digital Television, detailing its scope and general provisions. It references various standards such as ETSI, AS/NZ, DVB, ITU, and IEC/ISO, and emphasizes the importance of channel coding and modulation for digital broadcasts. The updated standard includes specifications for framing structure, spectrum masks, multiplexing, and transport streams. Key adaptations for Australian requirements and related audio/video descriptors are also highlighted. The final publication will be available on CD-ROM, ensuring easy access to reference standards and links.

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Australian Standard for Digital Television: Scope & General Overview

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  1. DRAFT AUSTRALIAN STANDARD - DIGITAL TELEVISION PART 1

  2. SCOPE & GENERAL • References still being revised • ETSI, AS/NZ, DVB, ITU and IEC/ISO standards • Cross referencing links • Intention for final Publication on CD-ROM together with reference standards and links • Updated to latest approved texts

  3. CHANNEL CODING and MODULATION • EN 300744 - Framing Structure,Channel Coding and Modulation • Emphasis on 7 MHz channel bandwidth • Improved descriptive text- but no change to the actual standard • Spectrum mask for 7 MHz transmission

  4. CHANNEL CODING and MODULATION • EN 300744 - Framing Structure,Channel Coding and Modulation • Spectrum mask for co-located adjacent channel analogue • Spectrum mask for co-located adjacent channel digital

  5. CHANNEL CODING and MODULATION • TS 101 191 DVB mega-frame for Single Frequency Network Synchronization • Modified to note the different time duration for the different bandwidth systems • Clause and standards references • Addition of 6 MHz values

  6. MULTIPLEX & TRANSPORT STREAM • ETR 154 - Implementation Guidelines for the use MPEG-2 Systems • Removal of constraint of no two elementary streams having the same stream_id • Added requirement to always transmit the profile_stream_descriptor field if not MP@ML

  7. MULTIPLEX & TRANSPORT STREAM • ETR 154 - Implementation Guidelines for the use MPEG-2 Systems • removal of reference to hierarchy_descriptor for video • Additional requirement to use the target_background_descriptor whenresolution exceeds the MP@ML bounds

  8. MULTIPLEX & TRANSPORT STREAM • ETR 154 - Implementation Guidelines for the use MPEG-2 Systems • Addition of Storage Media Interoperability limits to suit digital HD VCR data rates and handle DVB-T Transport Stream. • Deletion of reference to 30 Hz IRDs • Luminance resolution -correction of error only

  9. MULTIPLEX & TRANSPORT STREAM • ETR 154 - Implementation Guidelines for the use MPEG-2 Systems • Changes necessary to address inclusion of AC3

  10. MULTIPLEX & TRANSPORT STREAM • EN 300 468 - Specification for Service Information • Inclusion of reference and abbreviations for AC3 • Revision of Figure 1 to illustrate Australian Networks

  11. MULTIPLEX & TRANSPORT STREAM • EN 300 468 - Specification for Service Information • Revision to the description of the Network Information Table to reflect proposed DVB updates • Bouquet Association table yet to be finalized

  12. MULTIPLEX & TRANSPORT STREAM • EN 300 468 - Specification for Service Information • Logical channel descriptor is an Australian adaptation of an addition introduced in UK for the BAT • Service description Table modified to reflect DVB proposed updates

  13. MULTIPLEX & TRANSPORT STREAM • EN 300 468 - Specification for Service Information • Component descriptor tables to be modified to handle AC3 • Content descriptor tables may be modified to provide Australian appropriate descriptors

  14. MULTIPLEX & TRANSPORT STREAM • EN 300 468 - Specification for Service Information • Terrestrial delivery system descriptor modification to add values for 6 MHz • Parental rating descriptor tables may need adaptation to Australian ratings

  15. MULTIPLEX & TRANSPORT STREAM • ETR 211 Implementation and usage of Service Information • Will need further work to align with the changes to EN.300 468 • ETR 162 Allocation of Service Information codes • Yet to be addressed

  16. ELEMENTARY STREAM VIDEO • AS/NZ 13818-2 • Note that this may have to refer to ISO/IEC 13818

  17. ELEMENTARY STREAM AUDIO • Addition of AC3 audio with revisions to ATSC A/52 constraints • Total bit-rate • Audio sampling rate

  18. DATA BROADCASTING • EN 301 192 DVB specification for data broadcasting • no change • ETS 300 743 Subtitling systems • no change

  19. DATA BROADCASTING • EN 300 472 Specifications for conveying ITU-R System B Teletext • no change • ETR 289 Support for the use of scrambling and Conditional Access • no change

  20. DIGITAL TELEVISION Part 1SUMMARY • Standards examined - 13 • Clauses examined - 574 • Adopted unchanged - 527 • Amended - 47 [39] • New - 5 [3]

  21. Thank you for your attention

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