Doc. A/81 30 July 2003 ATSC Direct-to-Home Satellite Broadcast Standard Advanced Television Systems Committee 1750 K Street, N.W. Suite 1200 Washington, D.C. 20006 www.atsc.org ATSC Direct-to-Home Satellite Broadcast Standard 30 July 2003 The Advanced Television Systems Committee, Inc., is an international, non-profit organization developing voluntary standards for digital television. The ATSC member organizations represent the broadcast, broadcast equipment, motion picture, consumer electronics, computer, cable, satellite, and semiconductor industries. Specifically, ATSC is working to coordinate television standards among different communications media focusing on digital television, interactive systems, and broadband multimedia communications. ATSC is also developing digital television implementation strategies and presenting educational seminars on the ATSC standards. ATSC was formed in 1982 by the member organizations of the Joint Committee on InterSociety Coordination (JCIC): the Electronic Industries Association (EIA), the Institute of Electrical and Electronic Engineers (IEEE), the National Association of Broadcasters (NAB), the National Cable Television Association (NCTA), and the Society of Motion Picture and Television Engineers (SMPTE). Currently, there are approximately 140 members representing the broadcast, broadcast equipment, motion picture, consumer electronics, computer, cable, satellite, and semiconductor industries. ATSC Digital TV Standards include digital high definition television (HDTV), standard definition television (SDTV), data broadcasting, multichannel surround-sound audio, and satellite direct-to-home broadcasting. 2 ATSC Direct-to-Home Satellite Broadcast Standard 30 July 2003 Table of Contents 1. SCOPE.....................................................................................................................................................6 2. REFERENCES.........................................................................................................................................6 2.1 Normative references 6 2.2 Informative References 7 3. DEFINITIONS...........................................................................................................................................7 3.1 Compliance Notation 7 3.2 Acronyms and Abbreviations 7 4. SYSTEM OVERVIEW...............................................................................................................................9 4.1 Transmission System 9 4.2 Integrated Receiver Decoder System 11 5. TRANSMISSION SUBSYSTEM.............................................................................................................11 6. TRANSPORT SUBSYSTEM SPECIFICATION......................................................................................11 6.1 Video T-STD 12 6.2 Audio T-STD 12 6.3 Identification of MPEG-2 Private Ranges 12 6.3.1 MPEG-2 Registration Descriptor 12 6.3.2 Program Identifier 12 6.3.3 Audio Elementary Stream Identifier 12 6.3.4 Other Program Element Identifiers 12 6.4 Constraints on PSI 13 6.5 PES Constraints 13 6.5.1 Audio PES Constraints 14 6.6 Specification of ATSC Private Data 14 6.7 Descriptors 14 6.7.1 Video Stream Descriptor 15 6.8 Audio Constraints 15 7. VIDEO SUBSYSTEM SPECIFICATION.................................................................................................15 7.1 Possible Video Inputs 15 7.2 Source Coding Specification 15 7.3 Constraints with Respect to ISO/IEC 13818-2 Main Profile 15 7.3.1 Sequence Header Constraints 16 7.3.2 Compression Format Constraints 16 7.3.3 Sequence Extension Constraints 17 7.3.4 Sequence Display Extension Constraints 18 7.3.5 Picture Coding Constraints 18 3 ATSC Direct-to-Home Satellite Broadcast Standard 30 July 2003 7.3.6 MPEG-2 Still Pictures 18 7.4 Bit Stream Specifications Beyond MPEG-2 19 7.4.1 Encoding and Transport of Advanced DTV Captions 19 7.4.2 Encoding and Transport of NTSC Closed Captions 19 7.4.3 Encoding of Other NTSC VBI Data 19 7.4.4 Encoding and Transport of Bar Data 19 7.4.5 Encoding and Transport of Active Format Description Data 19 8. AUDIO SUBSYSTEM SPECIFICATION................................................................................................19 8.1 Constraints with Respect to ATSC Standard A/52A 19 8.1.1 Sampling Frequency 19 8.1.2 Audio Coding Modes 19 8.2 MPEG-1 Layer II Audio 20 9. PSIP SYSTEM........................................................................................................................................20 9.1 Overview 20 9.2 Data Structure 21 9.2.1 Table Format 21 9.3 Extensibility 23 9.4 User Private Ranges 23 9.4.1 table_id values in the range 0x40 through 0xBF 23 9.5 Reserved Fields 23 9.6 Table Hierarchy and Structure Requirements 24 9.7 Requirements for Satellite Broadcast 25 9.8 Code points defined in this Standard 26 9.9 Specifications 26 9.9.1 Satellite Virtual Channel Table (SVCT) 26 9.9.2 Aggregate Event Information Tables (AEIT) 31 9.9.3 Aggregate Extended Text Tables (AETT) 34 9.9.4 Master Guide Table (MGT) 36 9.9.5 Core Descriptors 37 9.9.6 PSIP STD Model Constraints 37 10. CONDITIONAL ACCESS SUBSYSTEM................................................................................................38 4 ATSC Direct-to-Home Satellite Broadcast Standard 30 July 2003 Tables and Figures Table 7.1 Standardized Video Input Formats 15 Table 7.2 Sequence Header Constraints 16 Table 7.3 Compression Format Constraints 17 Table 7.4 Sequence Extension Constraints 18 Table 7.5 Sequence Display Extension Constraints 18 Table 8.1 Audio Coding Mode 20 Table 9.1 Generic Table format used in Satellite PSIP 21 Table 9.2 Table ID Ranges and Values (Informative) 22 Table 9.3 Bit Stream Syntax for the Satellite Virtual Channel Table 27 Table 9.4 Modulation Modes 29 Table 9.5 Polarization Coding 30 Table 9.6 FEC_inner Coding 30 Table 9.7 Aggregate Event Information Table format 32 Table 9.8 Aggregate Extended Text Table Format 35 Table 9.9 ETM ID 36 Table 9.10 MGT Table Types for Satellite Application 36 Table 9.11 List of Descriptors for Satellite PSIP Tables 37 Table 9.12 Maximum cycle time for the STT, MGT, SVCT and RRT 38 Table 9.13 Maximum Rate for Each PSIP Packet Stream 38 Figure 4.1 Overview of the Transmission System. 10 Figure 4.2 Functional block diagram of an IRD system. 11 Figure 9.1 Table hierarchy for Satellite PSIP 24 5 ATSC Direct-to-Home Satellite Broadcast Standard 30 July 2003 ATSC Direct-to-Home Satellite Broadcast Standard 1. SCOPE This document describes the emission system for ATSC Direct-to-Home (DTH) Satellite Broadcast System. This specification defines extensions to audio, video, transport, and PSIP subsystems as defined in ATSC Standards A/53B and A/65A. The emission system defined in this document includes carriage of data broadcasting as defined in ATSC Standard A/90 without requiring extensions. Furthermore, transmission and conditional access subsystems are not defined, allowing service providers to use existing subsystems. 2. REFERENCES 2.1 Normative references The following documents contain provisions which, in whole or in part, through reference in this text, constitute provisions of this Standard. At the time of publication, the editions indicated were valid. All standards are subject to revision and amendment, and parties to agreements based on this Standard are encouraged to investigate the possibility of applying the most recent editions of the documents listed below. 1. ANSI/SCTE 20 2001: Standard Methods for Carriage of Closed Captions and Non-Real Time Sampled Video. 2. ANSI/SCTE 21 2001: Standard for Carriage of NTSC VBI Data in Cable Digital Transport Streams. 3. ATSC A/52A (2001): “Digital Audio Compression (AC-3).” 4. ATSC A/53B with Amendment 1: “ATSC Digital Television Standard.” 5. ATSC A/63 (1997): “Standard for Coding 25/50 Hz Video.” 6. ATSC A/65B (2003): “Program and System Information Protocol (PSIP) for Terrestrial Broadcast and Cable.” 7. ATSC A/80 (2000): “Modulation and Coding Requirements for Digital TV (DTV) Applications Over Satellite.” 8. ATSC T3-580 (2002): “Proposed Standard: Amendment 2 to A/53B.” 9. EIA/CEA-608-B (2000): Line 21 Data Services. 10. ANSI/SCTE 54 2002A: Digital Video Service Multiplex and Transport System Standard for Cable Television. 11. EIA/CEA-766-A (2000): U.S. and Canadian Rating Region Tables (RRT) and Content Advisory Descriptors for Transport of Content Advisory Information Using ATSC A/65- A Program and System Information Protocol (PSIP). 12. EIA-708-B (1999): Digital Television (DTV) Closed Captioning. 13. EN 300 421 V1.1.2 (1997-08): “Digital Video Broadcasting (DVB); Framing structure, channel coding and modulation for 11/12 GHz satellite services.” 14. ISO 639.2 (1998): Code for the representation of names of languages Part 2: Alpha-3 code. 6 ATSC Direct-to-Home Satellite Broadcast Standard 30 July 2003 15. ISO/IEC 10646-1: 2000: Information technology—Universal Multiple-Octet Coded Character Set (UCS)—Part 1: Architecture and Basic Multilingual Plane. 16. ISO/IEC 13818-2: 2000/Cor. 1: 2001 (E) MPEG-2 Video Technical Corrigendum. 17. ISO/IEC IS 13818-1 (2000): Information Technology—Generic coding of moving pictures and associated audio—Part1: Systems. 18. ISO/IEC IS 13818-2 (2000): Information Technology—Generic coding of moving pictures and associated audio—Part 2: Video. 19. The Unicode Standard, Version 3.0, The Unicode Consortium, Addison-Wesley Pub., ISBN 0201616335. 2.2 Informative References 20. ANSI/SCTE 07 2000: Digital Video Transmission System Standard for Cable Television. 21. ANSI/SCTE 43 2002: Digital Video Systems Characteristics Standard for Cable Television. 22. ANSI/SCTE 65 2002: Service Information Delivered Out-of-Band for Digital Cable Television. 23. ATSC A/56 (1996): “System Information for Digital Television,” 24. ATSC A/70 (2000): “Conditional Access System for Terrestrial Broadcast.” 25. ATSC A/90 (2000): “Data Broadcast Standard.” 26. ETSI EN 300 468 V1.4.1 (2000-11): “Digital Video Broadcasting (DVB); Specification for Service Information (SI) in DVB systems.” 27. ISO/IEC 8859, Information Processing—8-bit Single-Octet Coded Character Sets, Parts 1 through 10. 28. ISO/IEC IS 11172-3, International Standard (1993), MPEG-1 Audio. 29. ITU-R BT.601-5: Encoding parameters of digital television for studios. 30. ITU-R BT.709: Basic Parameter Values for the HDTV Standard for the Studio and for International Programme Exchange. 31. ITU-T J.83B: Digital Video Transmission Standard for Cable Television. 32. SMPTE 274M (1995): Standard for television, 1920 x 1080 Scanning and Interface. 33. SMPTE 296M (1997): Standard for television, 1280 x 720 Scanning, Analog and Digital Representation, and Analog Interface. 3. DEFINITIONS 3.1 Compliance Notation As used in this document, “shall” denotes a mandatory provision of the standard. “Should” denotes a provision that is recommended but not mandatory. “May” denotes a feature whose presence does not preclude compliance, which may or may not be present at the option of the implementor. 3.2 Acronyms and Abbreviations The following acronyms and abbreviations are used within this specification: 7 ATSC Direct-to-Home Satellite Broadcast Standard 30 July 2003 AEIT aggregate event information table AETT aggregate extended text table ASTD ancillary service target decoder ATSC Advanced Television Systems Committee BPSK binary phase shift keying bslbf bit serial, leftmost bit first CA conditional access CAT conditional access table CRC cyclic redundancy check CVCT cable virtual channel table DET data event table DSM-CC digital storage media command and control DST data service table DTS decoding time stamp DVB Digital Video Broadcasting DVS Digital Video Subcommittee EA emergency alert ECM entitlement control message EIT event information table ES elementary stream ETM extended text message ETT extended text table GPS Global Positioning System IEC International Electrotechnical Commission ISO International Organization for Standardization MGT master guide table MPEG Moving Picture Experts Group MRD MPEG registration descriptor PAT program association table PES packetized elementary stream PID packet identifier PMT program map table PSI program specific information PSIP Program and System Information Protocol PTS presentation time stamp OQPSK offset quadrature phase shift keying QAM quadrature amplitude modulation QPSK quadrature phase shift keying 8 ATSC Direct-to-Home Satellite Broadcast Standard 30 July 2003 rpchof remainder polynomial coefficients, highest order first RRT rating region table SCTE Society of Cable Telecommunications Engineers SI service information STD system target decoder STT system time table TS transport stream T-STD transport stream system target decoder TVCT terrestrial virtual channel table uimsbf unsigned integer, most significant bit first UTC coordinated universal time1 VBV video buffering verifier 4. SYSTEM OVERVIEW The Satellite Broadcast System comprises of two major subsystems: 1) the Transmission System and 2) an Integrated Receiver Decoder, commonly referred as a Set Top Box (STB). 4.1 Transmission System The transmission system comprises an Emission Mux, a Modulator/Encoder, and a Transmitter. The Emission Mux requirements are discussed in this document. Specifications for the Modulator/Encoder and the Transmitter were deemed not necessary for the purposes of this standard, and are left for Service Provider to develop. 1 Because unanimous agreement could not be achieved by the ITU on using either the English word order, CUT, or the French word order, TUC, a compromise to use neither was reached. 9 ATSC Direct-to-Home Satellite Broadcast Standard 30 July 2003 Note : These streams delivered by ASI, G.703, ATM, 10BT/100BT A/81 Ethernet. Compliant ATSC Compliant Transport Modulator Multiprogram ASI Transport Stream Broadcast Network Emission Mux ATSC Compliant A/81 Multiprogram Compliant Transport Stream Transport ASI Modulator Optional Transport Streams PSIP with Satellite Extensions Data Figure 4.1 Overview of the Transmission System. Figure 4.1 shows a functional block diagram of a transmission system. The Emission Mux accepts and combines: (cid:127) ATSC multi-program transport streams (A/53B, A/65B, A/70, and A/90 protocols) from different sources (cid:127) Satellite extensions to PSIP Additionally, the Emission Mux may accept: (cid:127) MPEG Compliant (non-ATSC) transport streams (cid:127) Data streams such as A/90 and DVB data broadcast Each multi-program transport stream output from the Emission Mux to a modulator shall conform with: (cid:127) Transport, audio, and video format extensions defined for satellite delivery in this standard. (cid:127) System Information with all the normative elements from A/65B (PSIP) and Satellite extensions such as the Satellite VCT defined in this standard. Transport Streams at the output of the Emission Mux may also carry additional information to support delivery system specific needs (such as DVB-SI [26], A/56 [23], control data, EIA- 10