ATSC Standards Update: A/300 Revision Suite Published
As mentioned in the last issue of The Standard newsletter, the annual update of A/300, “ATSC 3.0 System,” was approved by the membership on July 17. The ballot question included direction to staff to update references and schemas in and to all ATSC 3.0 Standards and Recommended Practices. That process, which requires a significant amount of time, has now been completed. All 23 Standards and 10 Recommended Practices in the ATSC 3.0 suite have been updated and published on the ATSC web site. In addition to the annual reference updates, the new version of A/300 includes a new Annex B on “ATSC 3.0 Operating Configurations.”
The A/300 document updates include a new cover graphic design intended to match the updated ATSC branding. Going forward, all public technical documents will include the new look.
Work continues to integrate changes described in A/322:2024-09 Amendment No. 1, “ATSC 3.0 Errata,” approved by the membership on July 28, into the base standard. This amendment mainly corrects errata items found in the MIMO, Channel Bonding, and LDM combinations in the physical layer. It also fixes errata items for Subframe and Frame term additions, and LDM Core layer <= Enhanced Layer SNR description. The amendment has already been published on the ATSC web site.
An amendment to A/331 was approved by the membership on September 10. The changes described in the document, A/331:2025-06 Amendment No. 1, “Time,” are intended to alleviate any confusion regarding “GPS” (meaning the U.S. GPS SATNAV system), whether providing time data or location data, and to clarify the description of time generally. Publication is expected soon.
A number of Membership ballots are in process or expected to be issued shortly, including:
- S33-812r3, “ATSC Proposed Standard: A/331:2025-06 Amendment No. 2, User Agent String.”
- S33-792r5, “ATSC Proposed Standard: A/337:2024-04 Amendment No. 1, Application Event Delivery.”
- S33-805r1, “ATSC Proposed Standard: A/339:2024-04 Amendment No. 1, Audio Watermark Modification and Erasure.”
- S33-807r7, “ATSC Proposed Standard: A/331:2025-06 Amendment No. 3, Signaling, Delivery, Synchronization, and Error Protection.”
Posted in ATSC News
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