ATSC Standards Update: A/300 Revision Approved
Since the last issue of The Standard newsletter, the annual update of A/300, “ATSC 3.0 System,” was approved by the membership. In addition to the annual reference updates, the new version of A/300 includes an expanded Annex B on “ATSC 3.0 Operating Configurations.” A key element of the annual A/300 revision is direction to staff to update references and schemas in and to all ATSC 3.0 Standards and Recommended Practices. This results in updates to all 23 Standards and 12 Recommended Practices in the ATSC 3.0 suite.
A/300 is the central document of ATSC 3.0, presiding over the entire suite of standards and recommended practices that together comprise the full system. A/300 normatively references a particular version of each of the other standards, and each referenced document is interoperable with the others. This allows product developers to address a particular version of A/300 in a given product release, which is important for communication with customers and for interoperability with other products.
ATSC’s goal is to update A/300 annually. The balance between stability and evolution suggests that an annual cadence is a good target. This cadence is just that — a target. More frequent updates are possible if needed, and if no changes are merited, then a given version of A/300 could run for more than a year.
Aside from the A/300 updates, three documents are current at TG3 ballot:
- S32-716r3, “ATSC Working Draft: A/321:2025-07 Amendment #1, Bootstrap Clarification,” and S32-717r0, “ATSC Working Draft: A/322:2025-07a Amendment #1, Bootstrap Clarification.” These documents are being balloted together for elevation to Proposed Standard because they include interrelated changes. The ballot closes on 13 May 2026.
- S38-641r2, “ATSC Working Draft: Revision of A/344:2026-02, ATSC 3.0 Interactive Content.” This ballot is for elevation to Candidate Standard for a period of time ending 31 December 2026. The ballot closes on 12 May 2026.
Posted in ATSC News
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