US 12,323,619 B2
Video or image coding on basis of conditionally parsed ALF model and reshaping
Seethal Paluri, Seoul (KR); Seunghwan Kim, Seoul (KR); and Jie Zhao, Seoul (KR)
Assigned to LG ELECTRONICS INC., Seoul (KR)
Filed by LG ELECTRONICS INC., Seoul (KR)
Filed on Dec. 8, 2023, as Appl. No. 18/533,628.
Application 18/533,628 is a continuation of application No. 17/435,656, granted, now 11,889,111, previously published as PCT/KR2020/003103, filed on Mar. 5, 2020.
Claims priority of provisional application 62/814,856, filed on Mar. 6, 2019.
Prior Publication US 2024/0121434 A1, Apr. 11, 2024
Int. Cl. H04N 19/593 (2014.01); H04N 19/11 (2014.01); H04N 19/117 (2014.01); H04N 19/132 (2014.01); H04N 19/176 (2014.01); H04N 19/186 (2014.01); H04N 19/30 (2014.01); H04N 19/85 (2014.01)
CPC H04N 19/593 (2014.11) [H04N 19/11 (2014.11); H04N 19/117 (2014.11); H04N 19/132 (2014.11); H04N 19/176 (2014.11); H04N 19/186 (2014.11); H04N 19/30 (2014.11); H04N 19/85 (2014.11)] 15 Claims
OG exemplary drawing
 
1. An image decoding method performed by a decoding apparatus, the method comprising:
receiving image information through a bitstream;
generating luma prediction samples of a current block based on the image information;
performing a luma mapping with chroma scaling (LMCS) process for the luma prediction samples; and
reconstructing samples of the current block based on the mapped luma prediction samples,
wherein the performing the LMCS process includes:
deriving LMCS indices for the LMCS; and
generating the mapped luma prediction samples based on the luma prediction samples and the LMCS indices,
wherein the image information includes adaptation parameter set (APS),
wherein the APS includes LMCS data field,
wherein a LMCS data is derived based on the LMCS data field,
wherein the LMCS indices are derived based on the LMCS data.