US 12,081,802 B2
Video or image coding based on signaling of scaling list data
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 Aug. 18, 2023, as Appl. No. 18/235,485.
Application 18/235,485 is a continuation of application No. 17/958,696, filed on Oct. 3, 2022, granted, now 11,778,237.
Application 17/958,696 is a continuation of application No. 17/570,854, filed on Jan. 7, 2022, granted, now 11,503,343, issued on Nov. 15, 2022.
Application 17/570,854 is a continuation of application No. PCT/KR2020/008954, filed on Jul. 8, 2020.
Claims priority of provisional application 62/871,230, filed on Jul. 8, 2019.
Prior Publication US 2023/0396807 A1, Dec. 7, 2023
Int. Cl. H04N 19/70 (2014.01); H04N 19/124 (2014.01); H04N 19/132 (2014.01); H04N 19/176 (2014.01); H04N 19/18 (2014.01); H04N 19/30 (2014.01); H04N 19/172 (2014.01); H04N 19/174 (2014.01)
CPC H04N 19/70 (2014.11) [H04N 19/124 (2014.11); H04N 19/132 (2014.11); H04N 19/176 (2014.11); H04N 19/18 (2014.11); H04N 19/30 (2014.11); H04N 19/172 (2014.11); H04N 19/174 (2014.11)] 3 Claims
OG exemplary drawing
 
1. An image decoding method performed by a decoding apparatus, the method comprising:
obtaining image information including prediction information and residual information from a bitstream;
deriving prediction samples for a current block by performing a prediction based on the prediction information;
deriving quantized transform coefficients for the current block based on the residual information;
deriving transform coefficients by performing a dequantization process on the quantized transform coefficients based on scaling list data;
deriving residual samples based on the transform coefficients; and
generating reconstruction samples based on the prediction samples and the residual samples,
wherein the image information includes an adaptation parameter set (APS), header information, general constraints information and a sequence parameter set (SPS),
wherein the APS includes APS ID information and APS type information,
wherein the scaling list data is included in the APS based on the APS type information,
wherein the header information includes APS ID information related to scaling list data,
wherein the APS including the scaling list data is specified based on the APS ID information related to the scaling list data included in the header information,
wherein the SPS includes first enabled flag information related to whether the scaling list data is used,
wherein the scaling list data is included in the APS based on a value of the first enabled flag information being equal to 1,
wherein the general constraints information includes constraint flag information related to the scaling list data,
wherein based on a value of the constraint flag information being equal to 1, the value of the first enabled flag information is determined to be equal to 0, and
wherein based on a value of the constraint flag information being equal to 0, the value of the first enabled flag information is equal to 0 or 1.