Scaling AV1 Film Grain Synthesis

Film grain adds realistic noise to video but is tough to compress.

AV1 Film Grain Synthesis denoises video, compresses it, then recreates grain during playback using an auto-regressive pattern model and a brightness-based scaling function.

Using FGS reduces average bitrate by around 36% for high resolutions while preserving grain appearance.

Synthesized grain masks compression artifacts and enhances perceived quality even if quality metrics may not measure it accurately.

FGS streams lower start and average bitrates, reduce playback errors and rebuffering, speed up start time, and boost streaming stability and resolution choices.