US 12,231,633 B2
Cross component filtering-based image coding apparatus and method
Junghak Nam, Seoul (KR); and Jangwon Choi, Seoul (KR)
Assigned to LG Electronics Inc., Seoul (KR)
Filed by LG Electronics Inc., Seoul (KR)
Filed on Nov. 28, 2023, as Appl. No. 18/520,912.
Application 18/520,912 is a continuation of application No. 17/958,882, filed on Oct. 3, 2022, granted, now 11,870,985.
Application 17/958,882 is a continuation of application No. 17/683,039, filed on Feb. 28, 2022, granted, now 11,496,734, issued on Nov. 8, 2022.
Application 17/683,039 is a continuation of application No. PCT/KR2020/011598, filed on Aug. 31, 2020.
Claims priority of provisional application 62/893,758, filed on Aug. 29, 2019.
Prior Publication US 2024/0098261 A1, Mar. 21, 2024
This patent is subject to a terminal disclaimer.
Int. Cl. H04N 19/00 (2014.01); H04N 19/117 (2014.01); H04N 19/132 (2014.01); H04N 19/169 (2014.01); H04N 19/186 (2014.01); H04N 19/46 (2014.01); H04N 19/80 (2014.01)
CPC H04N 19/117 (2014.11) [H04N 19/132 (2014.11); H04N 19/186 (2014.11); H04N 19/1883 (2014.11); H04N 19/46 (2014.11); H04N 19/80 (2014.11)] 3 Claims
OG exemplary drawing
 
1. An image decoding method performed by a decoding apparatus, the image decoding method comprising:
receiving image information including prediction mode information through a bitstream;
determining prediction mode of a current block based on the prediction mode information;
generating prediction samples of the current block based on the prediction mode;
generating reconstructed luma samples and reconstructed chroma samples of the current block based on the prediction samples;
performing an adaptive loop filtering (ALF) process on the reconstructed chroma samples to generate filtered reconstructed chroma samples; and
performing a cross-component filtering process on the filtered reconstructed chroma samples to generate modified filtered reconstructed chroma samples,
wherein the image information includes an adaptation parameter set (APS) including ALF data including information on cross-component filtering,
wherein the ALF data includes information on a number of cross-component filters for the cross-component filtering and information on cross-component filter coefficients, and
wherein the modified filtered reconstructed chroma samples are generated based on the filtered reconstructed chroma samples and the cross-component filter coefficients.