A/344 Candidate Standard RevisionApproved: 12 May 2026

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.

Download “Candidate Standard Revision of A/344:2026-04, ATSC 3.0 Interactive Content”, 12 May 2026. This redline shows changes relative to the current published version of A/344:2026-04. A clean version, with all changes accepted, is also available: “Candidate Standard Revision of A/344:2026-04, ATSC 3.0 Interactive Content”. Schema files can be found here: atsc-schemas.org. The CS period extends to 31 December 2026.

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