Candidate Standards

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.


A/322: ATSC Proposed Standard – Physical Layer Protocol

Updated 29 June 2016. This document is currently at a re-ballot of TG3.

This document describes the RF/transmission system of a physical layer waveform. This waveform enables flexible configurations of physical layer resources to target a variety of operating modes. The intent is to signal the applied technologies and allow for future technology adaptation.

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A/330: ATSC Candidate Standard, Link-Layer Protocol

Approved 25 December 2015. Updated 5 July 2016. This document is currently at ballot as a Proposed Standard.

This document defines the ATSC Link-Layer Protocol (ALP). ALP corresponds to the data link layer in the OSI 7-layer model. ALP provides efficient encapsulation of IP, link layer signaling and MPEG-2 Transport Stream (TS) packets. ALP also provides overhead reduction mechanisms for IP and MPEG-2 TS transport. And ALP provides extensible headroom for future use.

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A/331, ATSC Candidate Standard: Signaling, Delivery, Synchronization, and Error Protection

Approved 5 January 2016. Updated 21 June 2016. The CS period end 30 September 2016.

This document specifies the technical mechanisms and procedures pertaining to service signaling and IP-based delivery of a variety of ATSC 3.0 services and contents to ATSC 3.0-capable receivers over broadcast, broadband and hybrid broadcast/broadband networks. The service signaling functionality defines the data formats and information components necessary to discover and acquire user services. The IP-based […]

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A/332, ATSC Candidate Standard: Service Announcement

Approved 24 November 2015. The CS period ends 30 September 2016.

The normative portions of this document define a standard for announcement of services in an ATSC 3.0 broadcast.

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A/333: ATSC Candidate Standard, Service Usage Reporting

Approved 25 December 2015; updated 16 May 2016. The CS period runs until 30 September 2016.

The normative portions of this document define a standard for service usage reporting for ATSC 3.0. A redline is available showing changes made relative to the previously-published version.

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A/334: ATSC Candidate Standard: Audio Watermark Emission

Approved 27 November 2015; updated 26 April 2016. This document is currently at ballot as a Proposed Standard.

This document specifies the VP1 audio watermark for use with systems conforming to the ATSC 3.0 family of specifications. This document specifies the format in which the audio watermark resides in a PCM audio signal. Emission by a broadcaster of the audio watermark is optional.

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A/335, ATSC Candidate Standard: Video Watermark Emission

Approved 30 November 2015; updated 22 March 2016. This document is currently at ballot as a Proposed Standard.

This document specifies the emission format for video watermarks for use within ATSC 3.0 broadcasts. The video watermark technology described provides the capability to robustly embed ancillary data in the transmitted pixels of a video signal. It is intended to provide a data path for its ancillary data payload that can readily survive changes in […]

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A/336: ATSC Candidate Standard, Content Recovery in Redistribution Scenarios

Approved 15 January 2016. The CS period ends 30 September 2016.

This document specifies payload formats for video and audio watermarks specified for use within ATSC 3.0 broadcast emissions.

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A/338, ATSC Candidate Standard: Companion Device

Approved 2 December 2015. The CS period ends 30 September 2016.

This document specifies the communication protocol between an ATSC primary device and an ATSC companion device. In this context the primary device is the primary receiver and is used to present the primary content. The companion device communicates with the primary device to present related, supplementary content, or even the same content as that being […]

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A/341, ATSC Candidate Standard: Video

Approved 23 December 2015. The CS period ends 30 September 2016.

This Standard describes the video coding constraints on ITU-T Rec. H.265 | International Standard ISO/IEC 23008-2 (“HEVC”) video compression in the ATSC 3.0 Digital Television System.

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A/342 Part 1: ATSC Candidate Standard – Audio Common Elements

Approved 3 May 2016. Updated 15 June 2016. The CS period ends 28 November 2016.

This document specifies the common framework for ATSC 3.0 Audio. It is intended to be used in conjunction with the specific audio technologies described in subsequent parts of this Standard. The ATSC 3.0 audio system provides immersive and personalizable sound for television. It is not compatible with the audio system used in ATSC 1.0 service. […]

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A/342 Part 2: ATSC Candidate Standard – AC-4 System

Approved 3 May 2016. Updated 15 June 2016. The CS period ends 28 November 2016

This document standardizes the AC-4 audio system for use in the ATSC 3.0 Digital Television System. It describes the characteristics of the AC-4 audio system and establishes a set of constraints on ETSI TS 103 190-2 for use within ATSC 3.0 broadcast emissions. A redline is available showing changes made relative to the previously-published version. […]

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A/342 Part 3: ATSC Candidate Standard – MPEG-H System

Approved 3 May 2016. The CS period ends 28 November 2016.

This document standardizes the MPEG-H Audio system for use in the ATSC 3.0 Digital Television System. It describes the characteristics of the MPEG-H Audio system and establishes a set of constraints on MPEG-H Audio for use within ATSC 3.0 broadcast emissions.

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A/343, ATSC Candidate Standard: Captions and Subtitles

Approved 23 December 2015. Updated 20 June 2016. The CS period ends 30 September 2016.

This standard defines the required technology for closed caption and subtitle tracks over ROUTE-DASH and MMT transports. This includes the content essence, the packaging and timing, and the transport-dependent signaling. A redline is available showing changes made relative to the previous version is available for download. Note that in this version (rev. 8), a URN tag: has […]

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