JVET-AN0013 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)]

1. Discussion

This period was reportedly slow, with no meetings or discussions held for this AHG.

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 modeling methods

The following topics are worthy of discussion for the second edition:

• Conformance – this is interesting due to Film Grain modeling 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

1. Related contributions

Five contributions related to AHG13 were identified as of 06/26/2025.

• One contribution was the AHG report:
  • JVET-AN0013 JVET AHG report: Film grain technologies (AHG13)
• Four other contributions were uploaded at the time of the report drafting:
  • JVET-AN0069 AHG9/AHG13: Updates for the film grain regions SEI message
  • JVET-AN0146 AHG9: On the film grain regions characteristics SEI message in TuC of VSEI
  • JVET-AN0229 AHG9: On the film grain characteristics SEI message in VSEI v4
  • JVET-AN0237 AHG13: Film grain analysis improvement

Contributions

There were four contributions registered other than the AHG report. All four were uploaded as of 10/02/25.