Patent ID: 11889082
Assignee: LG ELECTRONICS INC.
Field: Audio-visual technology (Electrical engineering)
Classification: CPC H | IPC H

Claim 15:
16. A transmission method of data for an image, the method comprising:
obtaining a bitstream for the image, wherein the bitstream is generated based on deriving an inter prediction mode, generating predicted luma samples based on the inter prediction mode, generating luma mapping with chroma scaling (LMCS) related information, generating mapped predicted luma samples based on a mapping process for luma samples, generating residual samples based on the mapped predicted luma samples, generating residual information based on the residual samples, and encoding image information including the LMCS related information and the residual information; and
transmitting the data comprising the bitstream,
wherein the image information includes LMCS adaptation parameter sets (APSs),
wherein an LMCS APS includes an LMCS data field,
wherein the LMCS data field includes the LMCS related information,
wherein LMCS codewords used in the mapping process and the inverse mapping process are derived based on the LMCS data field,
wherein the mapped predicted luma samples are generated based on the LMCS codewords,
wherein a maximum number of the LMCS APSs is a specific value, and
wherein the specific value is 4.