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.