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JVET AHG report: Film grain technologies (AHG13)
Abstract
This document summarizes the activities of AHG13: Film grain technologies, between the 38th Meeting (by teleconference, 26 March – 4 April 2025) and the 39th Meeting (Daejeon, KR, 26 June – 4 July 2025).
JVET-AM0013 JVET AHG report: Film grain technologies (AHG13) [W. Husak, P. de Lagrange (co-chairs), A. Duenas, X. Meng, M. Radosavljević, A. Segall, G. Teniou, A. Tourapis (vice-chairs)]
This period was reported to have been slow, with no meetings or discussions held.
From the previous meetings, the following five items should be in the second edition:
- Updated Technical Report (TR) text to fix errors and clumsy wording
- Updated tools for the TR
- Video test sequences specific to film grain to be added to the TR
- Metrics – discussion and/or survey of available techniques or metrics
- Subjective testing of Film Grain modelling methods
The following topics were suggested to be worthy of discussion for the second edition:
- Conformance – this is interesting due to Film Grain modelling being associated with SEI messages
- Film Grain Analysis methods– preprocessing analysis (parameter estimation)
The following are additional topics that could also be considered and discussed at likely lower priority:
- EG/RP documents providing guidance or usage recommendations for film grain technologies– The group is still considering what could be useful information for the industry and the scope of such documents
- Future parameters and signalling – not a v2 topic
Related contributions
Five contributions related to AHG13 were identified as of 2025-06-26.
- One contribution was the AHG report:
- JVET-AM0013 JVET AHG report: Film grain technologies (AHG13)
- Five other contributions were uploaded at the time of the report drafting:
- JVET-AM0085 AHG9/AHG13: On Film Grain Regions Characteristics SEI message
- JVET-AM0124 AHG9/AHG13: On typo fix and interface software contribution to the FGRC SEI message
- JVET-AM0168 AHG9/AHG13: Implementation in VTM TuC of the film grain regions characteristics SEI message
- JVET-AM0230 AHG9/AHG13: Reference picture resolution for the FGR SEI message
- JVET-AM0288 Neural network-based film grain analysis
Contributions
There were five contributions registered other than the AHG report. Four were uploaded as of 2025-06-23.
Decisions
JVET-AL2020 was planned to be delivered before the end of this meeting. Likely, no new version was expected to be issued from the current meeting.
Citation