Patent ID: 11895300
Assignee: LG ELECTRONICS INC.
Field: Audio-visual technology (Electrical engineering)
Classification: CPC H | IPC H

Claim 0:
1. A decoding apparatus for an 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 information related to residual samples from a bitstream;
generate residual samples of a current block based on the information related to the residual samples; and
generate reconstructed samples of the current block based on the residual samples of the current block,
wherein the information related to the residual samples includes information on a multiple transform selection (MTS) index and information on transform coefficients,
wherein the residual samples of the current block are generated from transform coefficients of the current block based on the information on the transform coefficients using a transform kernel set,
wherein the transform kernel set is determined by the MTS index among transform kernel set candidates,
wherein at least one bin among bins of a bin string of the MTS index is derived based on a context coding,
wherein the context coding is performed based on a value of a context index increment for the MTS index,
wherein the bin string of the MTS index includes up to 4 bins, and a number of context index increment values allocated to a bin which is derived by the context coding among the 4 bins is one,
wherein a value of the MTS index is derived based on the bin string of the MTS index, and
wherein the value of the MTS index is derived as one of candidates including 0 to 4.