Patent ID: 11917145
Assignee: LG ELECTRONICS INC.
Field: Audio-visual technology (Electrical engineering)
Classification: CPC H | IPC H

Claim 0:
1. An image decoding method performed by a decoding apparatus, the method comprising:
obtaining image information including information related to whether an adaptive loop filter (ALF) is applied, coefficient information for the ALF, information related to whether fixed filter set is applied, prediction related information, and residual information from a bitstream, wherein the coefficient information is included in the image information based on the information related to whether the ALF is applied;
deriving a prediction samples based on the prediction related information;
generating reconstructed samples based on the residual information and the prediction samples;
deriving filter coefficients for the ALF based on the coefficient information; and
generating modified reconstructed samples based on the reconstructed samples and the filter coefficients,
wherein the coefficient information is obtained by decoding based on Exponential-Golomb coding,
wherein the Exponential-Golomb coding is based on a fixed order,
wherein the image information further includes information on a fixed filter index indicating one of the fixed filters for the ALF based on the information related to whether the fixed filter set is applied,
wherein the filter coefficients are derived based on the information on the fixed filter index,
wherein the information on the fixed filter index is obtained based on a binarization process, and
wherein the binarization process is performed based on a truncated binary (TB) binarization.