ATSC Standards Update : Four New Documents Published

Posted on October 11, 2022 in ATSC News

Four new documents have published within the last month, and four others are currently at TG3 ballot. The newly published documents are:

• A/331:2022-03 Corrigendum No. 1, “SLT and S-TSID”, approved 22 September 2022. This corrigendum describes: 1) removal of a duplicate definition of Service@configuration in the text; and 2) correction of the cardinality of S-TSID.SrcFlow.Payload in the schema file to match the text (0..N). The current version of the standard is A/331:2022-09, “Signaling, Delivery, Synchronization, and Error Protection”.
• A/341:2022-03 Amendment No. 1, “Chroma Location / AFD and Bar Data”, approved 7 September 2022. This amendment corrects and clarifies two issues identified with A/341. The first clarifies the location of Chroma samples relative to Luma samples in a 4:2:0 video representation. These samples are positioned differently for legacy vs “UHD” video. The second clarifies specification language regarding the use of Active Format Description (AFD) and Bar Data. The current version of the standard is A/341:2022-09, “Video – HEVC”.
• ATSC Candidate Standard: “Revision of A/344:2022-03, ATSC 3.0 Interactive Content”, approved 9 September 2022. This Candidate Standard includes a number of changes, details of which are documented in a Change Log that accompanies the CS posting. The document is available on the ATSC 3.0 Candidate Standards The CS period extends to 8 December 2022.
• ATSC Candidate Standard: “A/53 Part 3:2013 Amendment No. 1, AVC Signal Transport”, approved 27 September 2022. This document aligns ATSC A/53 Part 3 with the method of implementing AVC compression of multicast programs that have been implemented in broadcast transmissions and are anecdotally reported to be received successfully on a large majority of “smart” DTV sets. The document is available on the ATSC 1.0 Candidate Standards The CS period extends to 31 January 2023.

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