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A Candidate Standard is a document that has received significant review within a specialist group. Advancement of a document to Candidate Standard is an explicit call to those outside of the related specialist group for implementation and technical feedback. This is the phase at which the specialist group is responsible for formally acquiring that experience or at least defining the expectations of implementation. |
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 CS/TSG-757r0, "Candidate Standard: Amendment No. 1 to ATSC Digital Television Standard (A/53) Part 5:2007"
CS/TSG-758r0, "Candidate Standard: Amendment No. 1 to ATSC Digital Television Standard (A/53) Part 6:2007"
The purpose of these amendments is to change the method of measuring the loudness of the average spoken program dialogue from the original “LAeq” method described in ANSI document ANSI S1.4-1983 (R 2001) “Specification for Sound Level Meters”, with amendment S1.4A-1995, to the method described by ITU-R Recommendation BS.1770, “Algorithms to measure audio programme loudness and true-peak audio level” (International Telecommunications Union, Geneva, 2006). The ITU measurement method agrees more closely with subjective loudness assessments than does the LAeq method.
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CS/TSG-746r0, "Candidate Standard: Revision B of ATSC Standard A/57, Content Identification and Labeling for ATSC Transport"
This Candidate Standard revision to A/57A brings the ATSC method for content identification in line with methods defined in MPEG-2 Systems, replacing an ATSC-defined descriptor with the ISO-defined Content Labeling Descriptor. The ISO descriptor is general-purpose and can carry an International Standard Audiovisual Number (ISAN) or any type of identifier. Additionally, the draft revision defines an ATSC Content Identifier structure (carried inside the ISO descriptor) that allows a broadcaster to identify content with a “house number.” As this number is scoped to the broadcaster’s Transport Stream ID (TSID), each broadcaster is free to use any desired numbering scheme. Recognizing that house numbers are re-used after a period of time, the ATSC Content Identifier includes parameters identifying the lifetime of the number: the time period during which the content ID value will not be reassigned to different content. Broadcasters are encouraged to review the proposed house number scheme and provide any feedback to the TSG/S8 Transport Specialists Group. |
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CS/TSG-674r1, "Candidate Standard: Draft Amendment to ATSC Digital Television Standard, Doc. A/53D Annex A" |
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CS/TSG-659r4, "Candidate Standard: Part 1 of Proposed Doc. A/72,“Video System Characteristics of AVC in the ATSC Digital Television System"
This Part describes the video coding constraints on ITU-T Rec. H.264 | ISO/IEC 14496-10 (“AVC”) video compression in the ATSC Digital Television System. The Transport Stream constraints for AVC are described in a separate Part of this standard. |
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CS/TSG-660r2, "ATSC Candidate Standard: Part 2 of Proposed Doc. A/72, “ AVC Video Transport Subsystem Characteristics "
This Part describes the transport of ATSC A/73-1 (“AVC”) video in the ATSC Digital Television System. The syntax and semantics of this specification conform to ATSC A/53-3 [2], with additional constraints specified in this standard. “AVC” in this Part 2 refers to the constrained version of ITU-T Rec. H.264 | ISO/IEC 14496-10 [5] as defined in Part 1 of this Standard. |
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ATSC documents are available in the Adobe Acrobat (PDF) format. If you do not have Adobe Acrobat Reader, you may download a free reader from Adobe. Note that newer documents have been produced using Acrobat Version 7.0. This version, by default, writes files that can not be read by Readers before 6.0. It may be necessary, therefore, to download the latest version of Acrobat Reader.
Please note that some of these documents contain Normative References from Organizations that meet the criteria stated in the ATSC Policy on Copyright and References. |
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