US 12,262,008 B2
Video or image coding applying adaptive loop filter
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 Dec. 11, 2023, as Appl. No. 18/535,721.
Application 18/535,721 is a continuation of application No. 17/949,653, filed on Sep. 21, 2022, granted, now 11,889,071.
Application 17/949,653 is a continuation of application No. 17/570,237, filed on Jan. 6, 2022, granted, now 11,601,645, issued on Mar. 7, 2023.
Application 17/570,237 is a continuation of application No. PCT/KR2020/008941, filed on Jul. 8, 2020.
Claims priority of provisional application 62/871,223, filed on Jul. 8, 2019.
Prior Publication US 2024/0129463 A1, Apr. 18, 2024
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 19/186 (2014.01); H04N 19/46 (2014.01); H04N 19/82 (2014.01)
CPC H04N 19/117 (2014.11) [H04N 19/132 (2014.11); H04N 19/176 (2014.11); H04N 19/186 (2014.11); H04N 19/46 (2014.11); H04N 19/82 (2014.11)] 3 Claims
OG exemplary drawing
 
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 related information, residual information and adaptive loop filter (ALF) information from a bitstream;
derive prediction samples of a current block based on the prediction related information;
derive residual samples of the current block based on the residual information;
generate reconstructed samples of the current block based on the prediction samples and the residual samples;
derive filter coefficients for an ALF based on the ALF information; and
perform an adaptive loop filter (ALF) process on the reconstructed samples to generated modified reconstructed samples of the current block based on the filter coefficients,
wherein the image information includes index information of an alternative filter for a chroma component of the current block,
wherein the ALF information includes alternative filter information for the chroma component of the current block including information on a number of alternative filters for the chroma component of the current block,
wherein based on the information on the number of the alternative filters for the chroma component of the current block, the alternative filter information includes absolute value information of coefficients included in alternative filters for the chroma component of the current block and sign information of coefficients included in the alternative filters for the chroma component of the current block,
wherein the index information of the alternative filter is based on truncated rice binarization,
wherein bins of a bin string for the index information of the alternative filter are entropy-decoded based on a context model,
wherein the context model for the bins of the bin string related to the index information of the alternative filter is determined based on a context index increment for the bins, and
wherein the context index increment is determined based on the chroma component of the current block.