JVET-AO0105 AHG9: Miscellaneous aspects of film grain regions characteristics SEI message [J. Lee, H. Tan, C. Kim, J. Nam, J. Lim, S. Kim (LGE)]

Chaired by S. Deshpande on 21:30-22:00 on 20 Jan 2026.

This contribution proposes miscellaneous modifications that are asserted to provide improvement to the film grain regions characteristics SEI message in TuC for future extensions of VSEI. The proposed modifications are as follows:

1. Specify the value range of fgr_pic_width_in_luma_samples and fgr_pic_height_in_luma_samples. This was agreed.
2. Specify the value of fgrModelidValue[ x ][ y ] when fgr_region_based_adaptation_flag is equal to 0. This was agreed.
3. Clarify the input which film grain synthesis applies to. The proposed text is mainly copied from FGC. This is an editorial correction and aligns FGRC to FGC SEI, and was agreed. [Ed. Numbering formatting issue]

Quality metrics SEI message (4)

Contributions in this area were discussed during 2320–UTC on Friday 16 Jan. 2026 – 0020 UTC on Saturday 17 Jan. 2026 (chaired by J. Boyce).

JVET-AO0105 AHG9: Miscellaneous aspects of film grain regions characteristics SEI message

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