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Abstract
This document contains draft text for changes under consideration for future extensions to the versatile supplemental enhancement information messages for coded video bitstreams (VSEI) standard (Rec. ITU-T H.274 ISO/IEC 23002-7) to modify existing SEI messages, specify additional SEI messages, or specify other functionalities. This document also contains draft text for changes under consideration for future extensions to the VVC, HEVC, and AVC standards for specifying the use of SEI messages specified in VSEI in VVC, HEVC, and AVC bitstreams, respectively.
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JVET-AQ2032 Technologies under consideration for future extensions of VSEI (version 13) [S. Deshpande, J. Boyce, J. Chen, M. M. Hannuksela, Y. He, K. Sühring, G. J. Sullivan, H. Tan, A. Tourapis, J. Xu, X. Xu] (2026-08-28)
Primary editor: S. Deshpande
It is noted that the availability date above is for the final version, and it is expected to have an initial version available by 2026-08-07. Alignment with software development of the GSI SEI is of high priority, as the the software is needed to conduct the related JEEs
New elements or improvements (list had been reviewed and approved in JVET plenary on Wednesday 15 July at 1130):
VSEI errata items
- (The aspect that affects syntax of SEI extensions included in the TuC) AVC JVET-AQ0089 AHG2/AHG9: Errata on general SEI signalling mechanism for VVC, VSEI, HEVC, and AVC
Editorial:
- JVET-AQ0072 AHG9: Editorial improvements for TuC
Multiple SEI messages
- JVET-AQ0163 AHG9: on SeiExtenionEnableFlag Interface for SII, PRI, EOI
- JVET-AQ0105 AHG9: On miscellaneous aspects of SEI messages in TuC
NNPF
- JVET-AQ0053 AHG9: On multilayer NNPF
- JVET-AQ0058 AHG9: On NNPF Multiple Inferences Information Signaling
- JVET-AQ0059 AHG9: Bug Fixes for Neural-network Post-filter in TuC
- JVET-AQ0155 AHG9: On NNPFC updates
Constituent rectangles (CR)
- JVET-AQ0096 AHG9: On the CR SEI message
- Items 1 and 2 of JVET-AQ0105 AHG9: On miscellaneous aspects of SEI messages in TuC
Enhanced colour format information (ECFI)
- Item 2 of JVET-AQ0075 AHG9: On video full range indication
- JVET-AQ0105 AHG9: On miscellaneous aspects of SEI messages in TuC
Versatile SEI RBSP
- JVET-AQ0090 A...
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JVET-AG0044
JVET-AG0045
JVET-AG0051
JVET-AG0086
JVET-AG0087
JVET-AG0203
JVET-AG0232
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Cited:
Decisions
JVET-AQ2032 Technologies under consideration for future extensions of VSEI (version 13)
New: IR camera adaptation parameters
Citation
Abstract
In this contribution, a number of editorial changes are suggested to improve the quality of the TuC document (JVET-AQ2032-v2). They are summarized as follows:
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JVET-AQ0072 AHG9: Editorial improvements for TuC [X. Xu, S. Liu (Tencent)]
In this contribution, a number of editorial changes are suggested to improve the quality of the TuC document (JVET-AQ2032-v2). They are summarized as follows:
- Replace “color” with “colour”
- Replace “-” with “−” in arithmetic operations
- Replace if ( * ) with if( * ), and for ( * ) with for( * )
- Replace “/” with “ / ”
- Replace “==” or “ = = ” with “ = = ”
- Replace “&&” or “ && ” with “ && ”
- Replace “+=” or “ += ” with “ += ”
- Replace “!=” or “ != ” with “ != ”
- Replace “>=” or “ >= ” with “ >= ”
- Replace “<=” or “ >= ” with “ <= ”
- Replace “>>” or “ >> ” with “ >> ”
- Replace “<<” or “ << ” with “ << ”
- Replace “in the range of xx .. yy” and “in the range xx to yy” with “in the range of xx to yy”
- Adjust proper spacing in between symbols, brackets and parentheses
- Fix various typos
Delegate all items to the editors.
References:
Cited:
Decisions
Delegate all items to the editors.
Citation
Abstract
This contribution describes the software implementation of explicit packing mode in the GSC VSEI reference framework, corresponding to gsi_implicit_packing_flag = 0 as defined in JVET-AP0100 and “Technologies under consideration for future extensions of VSEI” document JVET-AQ2032. The baseline framework GSC-v1.0 derives the 2D placement of every 3DGS component from a fixed raster-scan formula (implicit packing). Explicit packing mode instead allows these placement parameters (constituent frame index, top-left (x, y) position, and color plane) to be freely specified per component via the encoder configuration and signaled directly in the GSI SEI message.
References:
Citation
Abstract
This document describes the SEI-related exploration experiments on Gaussian splat coding. It collects information from WG5 JEE 6.7 on video-based coding technologies and WG5 and JEE 6.9 on evaluation of encapsulation methods for Gaussian splats.
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JVET-AQ2040 Description of SEI-related exploration experiments on Gaussian splat coding (Excerpt from WG 5 N 430 and N 432)
The following 17 documents were produced as WG 5 documents only, without a corresponding JVET output document or direct repetition of their content in this meeting report:
WG 5 N 410 Request for ISO/IEC 23008-2:202x/Amd.1 Additional HEVC profiles
WG 5 N 412 Request for ISO/IEC 23008-5:202x Reference software for HEVC (3rd edition)
WG 5 N 413 Text of ISO/IEC CD 23008-5:202x Reference software for HEVC (3rd edition)
WG 5 N 414 Request for ISO/IEC 23008-8:202x Conformance specification for HEVC (3rd edition)
WG 5 N 415 Text of ISO/IEC 23008-8:202x Conformance specification for HEVC (3rd edition)
WG 5 N 421 Draft CfP of Gaussian splat coding
WG 5 N 422 Call for content for Gaussian splat coding
WG 5 N 423 FAQ on Gaussian splat coding
WG 5 N 424 JEE 6.1 on data preparati...
References:
Decisions
As a primary goal, the JVET meeting reviewed the work that was performed in the interim period since the forty-second JVET meeting in producing the following output documents:
The meeting was closed at 1400 CEST on 2026-07-15.
Citation
Abstract
A spreadsheet is attached that contains a table describing the status of the SEI messages in the VSEI TuC as discussed in the JVET main track and the HLS track during the current meeting, according to the following criteria:
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JVET-AQ0240 Status of SEI messages in the VSEI TuC [J. Boyce]
It was agreed to include all SEI messages and extension in JVET-AQ2006 which are assessed to be mature enough an well understood in usefulness by the criteria that had been defined, as expressed of all fields of the corresponding row marked as green. These elements should be removed in JVET-AQ2032. At this moment, a differential text is defined as WD, which can better be managed than an integrated version.
It is emphasized by software coordinators that the current practice of doing frequent software changes in case of relatively early study on a large number imposes a large amount of work. It would be desirable to have a discussion on practices for implementing SEI messages in software, and potentially having a dedicated software coordinator would be necessary, also to avoid delays in the implementation. To be discussed in a f...
Decisions
M 78721 (JVET-AQ0238) was presented
Citation
Abstract
This contribution proposes rules for software available and CTC results of EE and TuC-related proposals.
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JVET-AQ0238 AHG9: On software availability and CTC results [B. Kroon (Philips), G. Teniou (Tencent), J. Boyce (Nokia), L. Kerofsky (Qualcomm)] [late]
This contribution proposes rules for software available and CTC results of JEE and TuC-related proposals on GS related SEI messages. The establishment of such rules had been requested to be suggested during the joint AHG meeting on 12 July.
The following modified text based on further editing the proposal in JVET-AQ0238v2 was agreed:
For EE inclusion, a contribution should normally provide:
a clear description of the proposed method;
identification of the affected part of VSEI: syntax, semantics, generation of SEI parameters and input to video encoder, reconstruction of GS from video decoder output;
software (source code);
CTC results (when the proposal affects coding efficiency), by giving a complete reporting as per template, including ob...
Decisions
A list of JVET-only output documents from the current meeting (including links to jvet-experts.org) was issued as a WG 5 document WG 5 N 417.
Citation