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A/344:2025-02 Candidate Standard RevisionApproved: 13 July 2025

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.

The Candidate Standard period extends to 11 December 2025.

Download “Candidate Standard Revision of A/344:2025-02, ATSC 3.0 Interactive Content”, approved 13 July 2025. This redline shows changes relative to the current published version of A/344:2025-02.

This revision includes updates and clarifications identified since the current version of A/344 was published.

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ATSC, the Broadcast Standards Association, is an international, non-profit organization developing voluntary standards and recommended practices for digital terrestrial broadcasting. Serving as an essential force in the broadcasting industry, ATSC guides the seamless integration of broadcast and telecom standards to drive the industry forward. Currently, the ATSC 3.0 Standard is providing the best possible solution for expanding the potential of the broadcast spectrum beyond its traditional application to meet changing needs. From conventional television to innovative digital data services, ATSC has one clear goal: to empower the broadcasting ecosystem like never before.

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