Patent ID: 11863775
Assignee: TENCENT AMERICA LLC
Field: Audio-visual technology (Electrical engineering)
Classification: CPC H | IPC H

Claim 19:
20. A non-transitory computer readable medium for storing computer instructions, the computer instructions, when executed by a processor, causes the processor to:
extract a first transform coefficient of a first color component from a bitstream of a coded video;
extract a second transform coefficient of a second color component from the bitstream of the coded video;
derive an offset value for modifying the already extracted second transform coefficient of the second color component based on a magnitude or sign value of the first transform coefficient;
add the offset value to a magnitude of the second transform coefficient to generate a modified second transform coefficient for the second color component prior to a reconstruction of the second color component; and
reconstruct the coded video at least by performing reverse transform of the first transform coefficient of the first color component and the modified second transform coefficient of the second color component.