Patent ID: 11930191
Assignee: LG ELECTRONICS INC.
Field: Audio-visual technology (Electrical engineering)
Classification: CPC H | IPC H

Claim 12:
13. An image encoding method performed by an encoding apparatus, the method comprising:
deriving at least one luma mapping with chroma scaling (LMCS) codeword;
generating residual information based on prediction for a current block;
generating reconstructed luma samples based on the at least one LMCS codeword and the residual information;
generating modified reconstructed luma samples based on the at least one LMCS codeword and the reconstructed luma samples;
generating LMCS related information based on the at least one LMCS codeword, the reconstructed luma samples, and the modified reconstructed luma samples; and
encoding image information including the residual information and the LMCS related information,
wherein the LMCS related information includes information on linear mapping,
wherein the at least one LMCS codeword is derived based on the information on the linear mapping, and
wherein the at least one LMCS codeword is a multiple of two.