Patent ID: 11889062
Assignee: LG ELECTRONICS INC.
Field: Audio-visual technology (Electrical engineering)
Classification: CPC H | IPC H

Claim 0:
1. A decoding apparatus for image decoding, the decoding apparatus comprising:
a memory; and
at least one processor connected to the memory, the at least one processor configured to:
obtain image information including prediction mode information and residual information from a bitstream;
derive prediction samples for a current block based on the prediction mode information;
derive quantized transform coefficients for the current block based on the residual information;
derive transform coefficients based on the quantized transform coefficients;
derive residual samples based on the transform coefficients; and
generate reconstruction samples based on the prediction samples and the residual samples,
wherein the transform coefficients are derived by performing a dequantization process on the quantized transform coefficients based on scaling list data, and
wherein the image information includes an adaptation parameter set (APS), and
wherein the APS is identified based on APS ID information related to an identifier for the APS, and
wherein the APS includes the scaling list data based on APS type information for APS parameters included in the APS, and
wherein a range of values of the APS ID information is determined based on the APS type information.