JVET-AP0061 AHG9/AHG13: On Film Grain Regions Characteristics SEI message [S. Deshpande, J. Samuelsson-Allendes (Sharp)]

This contribution proposes modifications to film grain regions characteristics (FGRC) SEI message, which is included in the Technologies under consideration for future extensions of VSEI. Following is proposed:

• Proposal 1: It is proposed to signal the flag fgr_film_grain_enabled_flag[ i ] only when fgr_active_regions_number_minus1 is greater than 0 and infer its value otherwise.
• Proposal 2: It is proposed to normatively specify the processing logic for applying film grain at a sample location which falls within multiple regions.
• Proposal 3: An asserted simplification is proposed to specify the for loop which signals the film grain models using a ternary conditional operator instead of using a derived variable.

Agreed to proposal 1, proposal 2.

Proposal 3 is delegated to the editors.

JVET-AP0061 AHG9/AHG13: On Film Grain Regions Characteristics SEI message