US 11,917,145 B2
Adaptive loop filter-based video or image coding
Seethal Paluri, Seoul (KR); and Seunghwan Kim, Seoul (KR)
Assigned to LG ELECTRONICS INC., Seoul (KR)
Filed by LG ELECTRONICS INC., Seoul (KR)
Filed on Oct. 6, 2022, as Appl. No. 17/961,160.
Application 17/961,160 is a continuation of application No. 17/513,540, filed on Oct. 28, 2021, granted, now 11,503,287.
Application 17/513,540 is a continuation of application No. PCT/KR2020/006206, filed on May 12, 2020.
Claims priority of provisional application 62/847,919, filed on May 14, 2019.
Prior Publication US 2023/0060397 A1, Mar. 2, 2023
This patent is subject to a terminal disclaimer.
Int. Cl. H04N 19/117 (2014.01); H04N 19/132 (2014.01); H04N 19/176 (2014.01); H04N 19/82 (2014.01); H04N 19/159 (2014.01)
CPC H04N 19/117 (2014.11) [H04N 19/132 (2014.11); H04N 19/159 (2014.11); H04N 19/176 (2014.11); H04N 19/82 (2014.11)] 14 Claims
OG exemplary drawing
 
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.