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/323: ATSC Candidate Standard: Dedicated Return Channel for ATSC 3.0

Approved 2 November 2017. The CS period ends 31 May 2018.

This document describes a Dedicated Return Channel (DRC) system for the ATSC 3.0 next generation broadcast standard. Both the physical layer and Media Access Control (MAC) layer specifications are detailed.

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ATSC Candidate Standard: A/341 Amendment – 2094-40

Approved 20 February 2018. The CS period ends 30 November 2018.

This document describes technology documented in 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/341:2018, “Video – HEVC,” (“A/341”) would be amended according to the edits described herein.

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