US 12,262,012 B2
Image or video coding based on signaling of quantization parameter offset-related information
Hendry Hendry, 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 Feb. 21, 2024, as Appl. No. 18/583,100.
Application 18/583,100 is a continuation of application No. 17/774,120, granted, now 11,973,947, previously published as PCT/KR2020/015420, filed on Nov. 5, 2020.
Claims priority of provisional application 62/931,184, filed on Nov. 5, 2019.
Prior Publication US 2024/0195970 A1, Jun. 13, 2024
This patent is subject to a terminal disclaimer.
Int. Cl. H04N 19/124 (2014.01); H04N 19/176 (2014.01); H04N 19/186 (2014.01); H04N 19/70 (2014.01)
CPC H04N 19/124 (2014.11) [H04N 19/176 (2014.11); H04N 19/186 (2014.11); H04N 19/70 (2014.11)] 3 Claims
OG exemplary drawing
 
1. An image decoding method performed by a decoding apparatus, the method comprising:
obtaining image information including index information on a chroma quantization parameter offset list from a bitstream;
deriving a value of a chroma quantization parameter offset for a current block based on the index information on the chroma quantization parameter offset list;
deriving a chroma quantization parameter for the current block based on the value of the chroma quantization parameter offset; and
performing palette coding on the current block based on the chroma quantization parameter to generate a reconstructed sample,
wherein for the current block on which the palette coding is performed, palette coding syntax is included in the image information,
wherein the method further comprises:
checking whether a tree type of the current block is a dual tree luma; and
checking information on a number of entries in the chroma quantization parameter offset list,
wherein based on the tree type of the current block being not the dual tree luma and a value of the information on the number of entries in the chroma quantization parameter offset list, the index information on the chroma quantization parameter offset list is included in the palette coding syntax.