18895594. SEI MESSAGE FOR FILM GRAIN SYNTHESIS (TENCENT AMERICA LLC)
SEI MESSAGE FOR FILM GRAIN SYNTHESIS
Organization Name
Inventor(s)
Stephan Wenger of Palo Alto CA US
Arianne Hinds of Palo Alto CA US
SEI MESSAGE FOR FILM GRAIN SYNTHESIS
This abstract first appeared for US patent application 18895594 titled 'SEI MESSAGE FOR FILM GRAIN SYNTHESIS
Original Abstract Submitted
A method and apparatus comprising computer code configured to cause a processor or processors to obtain video data comprising at least one coded picture, reconstruct a coded picture including a film grain characteristics SEI message, an alpha channel information SEI message, and at least a first sample and a second sample and at least a third alpha map sample and a fourth alpha map sample, wherein after reconstruction the first sample and the third alpha map sample, and the second sample and first sample are spatially co-located; apply film grain synthesis to the first sample based on a first value of the third sample; and determine to not applying film grain syntheses to the second sample based on a second value of the fourth sample, wherein the first value and second value are different from each other.