ATSC Standards Update: A/345, “VVC Video,” Finalized
Since the last issue of The Standard newsletter, a new Standard has been approved and published on the ATSC web site. The document, A/345, describes the video coding constraints on ITU-T Rec. H.266 | International Standard ISO/IEC 23090-3 (“VVC”) when it is used for video compression in the ATSC 3.0 Digital Television System. Any other video coding technologies in the ATSC 3.0 system are documented in their own ATSC Standard(s). A/300 “ATSC 3.0 System,” provides references to the various video coding technology document(s) in the ATSC 3.0 system. Signaling of the video compression technology in use is defined in A/331, “Signaling, Delivery, Synchronization, and Error Protection.”
Key features described in A/345 include:
- VVC Main 10 Profile, aligned with MPEG CMAF, with additional constraints.
- VVC Levels up to 6.1 supported, enabling Ultra HD (4K up to 120fps, 8K up to 60fps).
- Optional High Dynamic Range (HDR) support, including PQ, HLG, static HDR metadata, and dynamic HDR metadata solutions DM App #1, DM App #4, and SL-HDR1.
- Optional Spatial Scalability based on the Multilayer VVC Media Profile and aligned with CMAF.
- Optional Scalability based on LCEVC and aligned with CMAF.
- Optional use of AFD and Bar Data, enabling aspect ratios other than 16:9 and including 9:16 “portrait mode.”
- Optional use of full range video.
Earlier versions of this document were previously published as a Candidate Standard. A Candidate Standard is a document that has received significant review within a Specialist Group. Advancement of a document to Candidate Standard is an explicit call to those outside of the related Specialist Group for implementation and technical feedback. This is the phase at which the Specialist Group is responsible for formally acquiring that experience or at least defining the expectations of implementation.
Several other documents were at ballot of the full ATSC membership as this issue of The Standard was released. Those documents are:
- S33-726r3, “ATSC Proposed Standard: A/331:2024-04 Amendment No. 1, “Data Service Type, et al.”
- S33-711r8, “ATSC Proposed Standard: A/332:2024-04 Amendment No. 1,“VVC Capability Codes”
- S32-660r2, “ATSC Proposed Standard: A/327:2024-04 Amendment #2, TxID Code Assignments”
- S38-521r12, “ATSC Proposed Standard: Revision of A/344:2024-04, ATSC 3.0 Interactive Content”
Posted in ATSC News
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