Patent ID: 11924431
Assignee: LG ELECTRONICS INC.
Field: Audio-visual technology (Electrical engineering)
Classification: CPC H | IPC H

Claim 5:
6. An image encoding method performed by an encoding apparatus, the method comprising:
deriving a prediction mode of a current block;
deriving luma prediction sample values of the current block based on the prediction mode;
generating prediction mode information;
performing reshaping on the luma prediction sample values;
generating reshaping related information;
deriving residual information based on reshaped luma prediction sample values; and
encoding image information including the prediction mode information, the reshaping related information, and the residual information,
wherein the reshaping related information includes information on an absolute value of a delta codeword for deriving a linear or piecewise linear reshaper and information on a sign of the delta codeword,
wherein the reshaping related information includes information specifying whether a reshaper used to perform reshaping is linear or piecewise linear,
wherein based on the information specifying whether the reshaper is linear or piecewise linear, it is determined whether the reshaper is linear or piecewise linear, and
wherein based on a determination that the reshaper is piecewise linear, the reshaping related information includes information on the absolute value and the sign of the delta codeword for each of a plurality of bins.