US 12,273,520 B2
Method and an apparatus for encoding/decoding residual coefficient
Dong Gyu Sim, Seoul (KR); and Sea Nae Park, Seoul (KR)
Assigned to HANWHA VISION CO., LTD., Seongnam (KR)
Filed by HANWHA VISION CO., LTD., Seongnam (KR)
Filed on Sep. 15, 2023, as Appl. No. 18/468,667.
Application 18/468,667 is a continuation of application No. 17/666,412, filed on Feb. 7, 2022, granted, now 11,818,354.
Application 17/666,412 is a continuation of application No. 16/937,468, filed on Jul. 23, 2020, granted, now 11,277,613, issued on Mar. 15, 2022.
Application 16/937,468 is a continuation of application No. 16/431,562, filed on Jun. 4, 2019, granted, now 10,764,584, issued on Sep. 1, 2020.
Application 16/431,562 is a continuation of application No. 16/184,581, filed on Nov. 8, 2018, granted, now 10,356,413, issued on Jul. 16, 2019.
Claims priority of application No. 10-2018-0070161 (KR), filed on Jun. 19, 2018.
Prior Publication US 2024/0007634 A1, Jan. 4, 2024
This patent is subject to a terminal disclaimer.
Int. Cl. H04N 19/129 (2014.01); H04N 19/12 (2014.01); H04N 19/124 (2014.01); H04N 19/13 (2014.01); H04N 19/176 (2014.01); H04N 19/44 (2014.01); H04N 19/60 (2014.01)
CPC H04N 19/129 (2014.11) [H04N 19/12 (2014.11); H04N 19/124 (2014.11); H04N 19/13 (2014.11); H04N 19/176 (2014.11); H04N 19/44 (2014.11); H04N 19/60 (2014.11)] 8 Claims
OG exemplary drawing
 
1. A method for decoding an image, comprising:
decoding, based on a predetermined scan order, a residual coefficient of a current block in the image from a bitstream, the current block being obtained by dividing a current picture using a tree-based division method;
performing inverse-quantization on the residual coefficient by using a quantization parameter; and
reconstructing a residual sample of the current block by performing inverse-transform on the inverse-quantized residual coefficient,
wherein the inverse-transform is adaptively performed on the inverse-quantized residual coefficient based on a transform skip flag indicating whether the inverse-transform is skipped on the current block,
wherein the inverse-transform is performed based on a transform candidate set determined from among a plurality of transform candidate sets including a first transform candidate set and a second transform candidate set,
wherein each of the transform candidate sets includes at least one transform type being available for the inverse-transform of the current block, and
wherein the transform candidate set of the current block is determined, based on a size of the current block, among the plurality of transform candidate sets.