This document specifies methods by which receivers may recover content that is available from a broadcaster, but not delivered directly to the receiver through the RF broadcast signal. This method may be useful in the use case when the receiver is connected to a set-top box via an HDMI cable and is only receiving uncompressed A/V content and not the full signaling tables or alternate content choices offered by the broadcaster. The methods described in this document require an automatic content recognition (ACR) mechanism. The ACR mechanism is either the video and audio watermarks specified for use within ATSC 3.0 broadcast emissions or a fingerprint mechanism described in this document.
This document describes the method for a receiver to recover content via a broadband interface once it has acquired an ATSC 3.0 watermark payload or has identified content using fingerprints. It also specifies the format of certain files that may be returned in response to such a content recovery request.
There are multiple versions of this document. Please be sure to download the desired version. For amendments, the text includes a list of changes, the rationale for the changes, and compatibility considerations.
Download A/336:2018, “Content Recovery in Redistribution Scenarios”, approved 11 December 2018. This version is referenced by A/300:2019.
Download A/336:2018 Amendment No. 1, “Timed VP1 Messages”, approved 26 August 2019.
Download A/336:2018 Amendment No. 2, Addition of Media Type Definitions”, approved 27 August 2019.
Download A/336:2018 Amendment No. 3, “Dynamic Event Message Enhancements”, approved 3 October 2019.
Download A/336:2019, Content Recovery in Redistribution Scenarios”, 3 October 2019. This is an editorial rollup of Amendments 1 – 3 to A/336:2018. This version is referenced by A/300:2020.
Download A/336:2019 Amendment No. 1, “IANA Registration Alignment”, approved 4 June 2020.
Download A/336:2019,”Content Recovery in Redistribution Scenarios, with Amendment No. 1”. This document has Amendment No. 1 integrated into the standard.
A/336 establishes entity_string() and Server Code namespaces for use by broadcasters who want to incorporate ATSC-specified video and audio watermarks into their services. Use of A/336 requires registration of values within those namespaces prior to their use. The following organization is authorized to issue entity_string() and Server Code registrations: Verance.
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The Advanced Television Systems Committee, Inc., is an international, non-profit organization developing voluntary standards and recommended practices for digital terrestrial broadcasting. ATSC member organizations represent the broadcast, broadcast equipment, motion picture, consumer electronics, computer, cable, satellite, and semiconductor industries. ATSC also develops digital terrestrial broadcasting implementation strategies and supports educational activities on ATSC standards.