US 12,225,190 B2
Scaling list parameter-based video or image coding
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. 7, 2023, as Appl. No. 18/532,578.
Application 18/532,578 is a continuation of application No. 17/979,158, filed on Nov. 2, 2022, granted, now 11,889,062.
Application 17/979,158 is a continuation of application No. 17/570,882, filed on Jan. 7, 2022, granted, now 11,528,477, issued on Dec. 13, 2022.
Application 17/570,882 is a continuation of application No. PCT/KR2020/008955, filed on Jul. 8, 2020.
Claims priority of provisional application 62/871,227, filed on Jul. 8, 2019.
Prior Publication US 2024/0129456 A1, Apr. 18, 2024
This patent is subject to a terminal disclaimer.
Int. Cl. H04N 19/105 (2014.01); H04N 19/124 (2014.01); H04N 19/176 (2014.01); H04N 19/18 (2014.01); H04N 19/70 (2014.01); H04N 19/82 (2014.01)
CPC H04N 19/105 (2014.11) [H04N 19/124 (2014.11); H04N 19/176 (2014.11); H04N 19/18 (2014.11); H04N 19/70 (2014.11); H04N 19/82 (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 mode information, residual information and a sequence parameter set (SPS) from a bitstream;
deriving prediction samples for a current block based on the prediction mode information;
deriving quantized transform coefficients for the current block based on the residual information;
deriving transform coefficients based on the quantized transform coefficients;
deriving residual samples based on the transform coefficients; and
generating reconstruction samples based on the prediction samples and the residual samples,
wherein the transform coefficients are derived by performing a dequantization process on the quantized transform coefficients based on scaling list data,
wherein the image information includes an adaptation parameter set (APS),
wherein the APS is identified based on APS ID information related to an identifier for the APS,
wherein the APS includes the scaling list data based on APS type information for APS parameters included in the APS,
wherein a range of values of the APS ID information is determined based on the APS type information, and
wherein scaling list enabled flag information for indicating whether a scaling list is used for a scaling process is included in the SPS.