A/331, “Signaling, Delivery, Synchronization, and Error Protection”

A/331, “Signaling, Delivery, Synchronization, and Error Protection”

This document specifies protocols used for delivery and synchronization of media and non-timed data in the ATSC 3.0 system. A/331 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 delivery functionality specifies two application transport protocols for the carriage of media content and service signaling data over broadcast and/or broadband networks to receivers. The delivery functionality also includes mechanisms for the synchronization of media components delivered on the same or different transport networks, and application-layer forward error correction methods that enable error-free reception and consumption of media streams or discrete file objects. A component of this standard is the accompanying schema.

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/331:2019, “Signaling, Delivery, Synchronization, and Error Protection,” and accompanying schema, approved 20 June 2019. This is the version referenced by A/300:2019.

Download A/331:2019 Amendment No. 1, “MMT Hybrid Delivery,” approved 6 January 2020.

Download A/331:2019 Amendment No. 2, “Fix Daylight Saving,” approved 16 January 2020.

Download A/331:2019 Amendment No. 3, “ServiceId URL and BSID-PLP Mapping,” approved 26 December 2019.

Download A/331:2019 Amendment No. 4, “User Agent String,” approved 15 January 2020.

Download A/331:2019 Amendment No. 5, “Fix RRT,” approved 30 December 2019.

Download A/331:2019 Amendment No. 6, “Simulcast TSID,” approved 31 December 2019.

Download A/331:2019 Amendment No. 7, “DRM System ID,” approved 3 January 2020.

Download A/331:2019 Amendment No. 8, “Uniqueness of @serviceID,” approved 1 January 2020.

Download A/331:2019 Amendment No. 9, “Fix Keep Screen Clear,” approved 2 January 2020.

Download A/331:2020, “Signaling, Delivery, Synchronization, and Error Protection,” 16 January 2020. This document is a rollup of Amendments No. 1 through 9.

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