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A/53: ATSC Digital Television Standard, Parts 1 - 6, 2007 3 January 2007 Advanced Television Systems Committee, Inc. 1750 K Street, N.W., Suite 1200 Washington, D.C. 20006 2 Doc. A/53, Part 1:2007 3 January 2007 ATSC Digital Television Standard Part 1 – Digital Television System (A/53, Part 1:2007) Advanced Television Systems Committee 1750 K Street, N.W. Suite 1200 Washington, D.C. 20006 www.atsc.org ATSC A/53, Part 1 (System) 3 January 2007 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 A/53, Part 1 (System) 3 January 2007 Table of Contents 1. SCOPE AND DOCUMENTATION STRUCTURE.....................................................................................5 1.1 Documentation Structure 5 2. REFERENCES .........................................................................................................................................5 2.1 Normative References 5 2.2 Informative References 6 3. DEFINITIONS ...........................................................................................................................................6 3.1 Compliance Notation 7 3.2 Treatment of Syntactic Elements 7 3.3 Terms Employed 7 3.4 Symbols, Abbreviations, and Mathematical Operators 12 3.4.1 Arithmetic Operators 12 3.4.2 Logical Operators 13 3.4.3 Relational Operators 13 3.4.4 Bitwise Operators 14 3.4.5 Assignment 14 3.4.6 Mnemonics 14 3.4.7 Constants 14 3.4.8 Method of Describing Bit Stream Syntax 14 3.4.8.1 Definition of bytealigned Function 15 3.4.8.2 Definition of nextbits Function 15 3.4.8.3 Definition of next_start_code Function 15 4. SPECIFICATION AND CONSTRAINTS (NORMATIVE)........................................................................16 4.1 ATSC System Definition 16 4.2 Digital Television Services 16 5. SYSTEM OVERVIEW (INFORMATIVE).................................................................................................16 5.1 System Block Diagram 17 ANNEX A: HISTORICAL BACKGROUND (INFORMATIVE) ......................................................19 1. FOREWORD...........................................................................................................................................19 2. HISTORICAL BACKGROUND...............................................................................................................19 2.1 Advisory Committee on Advanced Television Service (ACATS) 20 2.2 Digital HDTV Grand Alliance (Grand Alliance) 20 2.3 Organization for Documenting the Digital Television Standard 21 2.4 Principles for Documenting the Digital Television Standard 21 3 ATSC A/53, Part 1 (System) 3 January 2007 Index of Tables and Figures Table 3.1 Next Start Code 15 Table 4.1 Service Types 16 Figure 5.1 ITU-R digital terrestrial television broadcasting model. 17 4 ATSC A/53, Part 1 (System) 3 January 2007 ATSC Digital Television Standard – Part 1: Digital Television System 1. SCOPE AND DOCUMENTATION STRUCTURE The Digital Television Standard describes the system characteristics of the U. S. advanced television (ATV) system. The document and its normative Parts provide detailed specification of the parameters of the system including the video encoder input scanning formats and the pre- processing and compression parameters of the video encoder, the audio encoder input signal format and the pre-processing and compression parameters of the audio encoder, the service multiplex and transport layer characteristics and normative specifications, and the VSB RF/Transmission subsystem. 1.1 Documentation Structure The documentation of the Digital Television Standard consists of this Part and several related Parts that provide a general system overview, a list of reference documents, and sections relating to the system as a whole. The system is modular in concept and the specifications for each of the modules are provided in other parts: Part 1 – System (formerly the body, plus the former Annex F) Part 2 – RF/Transmission System Characteristics (formerly Annex D) Part 3 – Service Multiplex and Transport Subsystem Characteristics (formerly Annex C) Part 4 – MPEG-2 Video System Characteristics (formerly Annex A) Part 5 – AC-3 Audio System Characteristics (formerly Annex B) Part 6 – High Efficiency Audio System Characteristics (formerly Annex G). 2. REFERENCES 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 2.1 Normative References Specific normative references can be found in each Part of this Standard. Those Parts are listed below along with an additional normative reference applicable to all Parts: [1] ATSC: “ATSC Digital Television Standard, Part 2 – RF/Transmission System Characteristics,” Doc. A/53, Part 2:2007, Advanced Television Systems Committee, Washington, D.C., 3 January 2007. [2] ATSC: “ATSC Digital Television Standard, Part 3 – Service Multiplex and Transport Subsystem Characteristics,” Doc. A/53, Part 3:2007, Advanced Television Systems Committee, Washington, D.C., 3 January 2007. [3] ATSC: “ATSC Digital Television Standard, Part 4 – MPEG-2 Video System Characteristics,” Doc. A/53, Part 4:2007, Advanced Television Systems Committee, Washington, D.C., 3 January 2007. 5 ATSC A/53, Part 1 (System) 3 January 2007 [4] ATSC: “ATSC Digital Television Standard, Part 5 – AC-3 Audio System Characteristics,” Doc. A/53, Part 5:2007, Advanced Television Systems Committee, Washington, D.C., 3 January 2007. [5] ATSC: “ATSC Digital Television Standard, Part 6 – High Efficiency Audio System Characteristics,” Doc. A/53, Part 6:2007, Advanced Television Systems Committee, Washington, D.C., 3 January 2007. [6] IEEE: “Use of the International Systems of Units (SI): The Modern Metric System”, Doc. IEEE/ASTM SI 10-2002, Institute of Electrical and Electronics Engineers, New York, N.Y., 2002. 2.2 Informative References The Digital Television Standard is based on the ISO/IEC MPEG-2 Video Standard [15], the Digital Audio Compression (AC-3) Standard [7], and the ISO/IEC MPEG-2 Systems Standard [14]. Those references are listed here for the convenience of the reader. In addition, a guide to the use of the Digital Television Standard [8] is listed. [7] ATSC: “Digital Audio Compression (AC-3),” Doc. A/52B, Advanced Television Systems Committee, Washington, D.C., 14 June 2005. [8] ATSC: “Guide to the Use of the ATSC Digital Television Standard,” Doc. A/54A, Advanced Television Systems Committee, Washington, D.C., 4 December 2003. [9] ATSC: “Program and System Information Protocol for Terrestrial Broadcast and Cable,” Doc. A/65C with Amendment No. 1, Advanced Television Systems Committee, Washington, D.C., 2 January 2006 (Amendment No. 1 dated 9 May 2006). [10] ATSC: “Data Broadcast Standard,” Doc. A/90 with Amendment No. 1 and Corrigendum No. 1 and No. 2, Advanced Television Systems Committee, Washington, D.C., 26 July 2000 (Amendment 1 dated 14 May 2002, Corrigendum 1 and 2 dated 1 April 2002). [11] ATSC: “Software Download Data Service,” Doc. A/97, Advanced Television Systems Committee, Washington, D.C., 16 November 2004. [12] ATSC: “Synchronization Standard for Distributed Transmission, Revision A,” Doc. A/110A, Advanced Television Systems Committee, Washington, D.C., 19 July 2005. [13] ATSC: “Code Point Registry,” Advanced Television Systems Committee, Washington, D.C., 2007, http://www.atsc.org/standards/cpr.html. [14] ISO: “ISO/IEC IS 13818-1:2000 (E), International Standard, Information technology – Generic coding of moving pictures and associated audio information: systems.” [15] ISO: “ISO/IEC IS 13818-2:2000 (E), International Standard, Information technology – Generic coding of moving pictures and associated audio information, video.” 3. DEFINITIONS With respect to definition of terms, abbreviations, and units, the practice of the Institute of Electrical and Electronics Engineers (IEEE) as outlined in the Institute’s published standards shall be used [6]. Where an abbreviation is not covered by IEEE practice, or industry practice differs from IEEE practice, then the abbreviation in question will be described