ATSC 3.0 : Candidate Standards
A Candidate Standard 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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A/200, ATSC Candidate Standard: Regional Service AvailabilityMost Recent Document Approved: 6 March 2019. This document is currently at Proposed Standards status.
This document specifies information describing the availability of broadcast services over time within a broadcast region. Broadcast receivers may use this information to help construct a list of services that may be available to them. Additionally, the information provides a schedule that allows receivers to maintain an up-to-date service list. This document describes how the information may be distributed using either an ATSC 1.0 broadcast (or any MPEG-2 transport stream), ATSC 3.0 broadcast, or over broadband.
The accompanying schema may be downloaded as a ZIP file. Note that the document name has changed for the schema; however, the file is identical to the previous version.
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A/324, ATSC Candidate Standard: Revision of A/324, Scheduler / Studio to Transmitter LinkMost Recent Document Approved: 23 May 2019. Updated 7 January 2020. The CS period ends on 30 September 2020.
This standard specifies the protocol on the Studio-to-Transmitter Link (STL) from studio side infrastructure to an SFN of Transmitters. It defines delivery protocols for ALP Transport. The document also defines possible interfaces among the studio infrastructure, for example the interconnection of the ATSC 3.0 Link Layer Protocol (ALP) and a Broadcast Gateway. This document specifies certain constraints on the scheduling of content and signaling on the Physical Layer. The described scheduling process enables Preamble generation and emission time management. It specifies certain aspects of Transmitter behavior and certain parameters of Transmitter operation.
A Redline document is available showing changes made since the last version.
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A/341, Amendment, ST-2094-40Most Recent Document Approved: 28 August 2019. Updated 24 September 2019. This document is currently at Proposed Standard status..
This document describes technology documented in SMPTE ST 2094-40 “Dynamic Metadata for Color Volume Transform — Application #4”, which is a technology for the use of dynamic metadata for HDR content. If approved by the ATSC, A/341:2019, “Video – HEVC,” (“A/341”) would be amended according to the edits described herein.
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Candidate Standard: Revision of A/344:2020, ATSC 3.0 Interactive ContentMost Recent Document Approved: 20 January 2020. Updated 3 March 2020. The CS period for this document ends on 30 November 2020.
This document describes the interactive content environment provided by an ATSC 3.0 receiver. This environment is comprised of a standard W3C User Agent with known characteristics, a WebSocket interface for obtaining information from the receiver and controlling various receiver functionality, and an HTTP interface for accessing files delivered over broadcast. This document also specifies the life cycle of the interactive content when delivered over broadband or broadcast or both.
A change log is available that describes the edits documented in the ATSC 3.0 Interactive Content Candidate Standard. These changes have been accepted by the TG3/S38 Specialist Group on Interactive Content but are pending full TG3 and membership approval. Readers are cautioned that these changes may be amended in the future but are encouraged to provide feedback and comments.
A redline is available showing changes made since the last published version of this Candidate Standard.
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