US 11,818,354 B2
Method and an apparatus for encoding/decoding residual coefficient
Dong Gyu Sim, Seoul (KR); and Sea Nae Park, Seoul (KR)
Assigned to HANWHA TECHWIN CO., LTD., Seongnam (KR)
Filed by HANWHA TECHWIN CO., LTD., Seongnam (KR)
Filed on Feb. 7, 2022, as Appl. No. 17/666,412.
Application 17/666,412 is a continuation of application No. 16/937,468, filed on Jul. 23, 2020, granted, now 11,277,613.
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 2022/0174282 A1, Jun. 2, 2022
Int. Cl. H04N 19/124 (2014.01); H04N 19/129 (2014.01); H04N 19/176 (2014.01); H04N 19/44 (2014.01); H04N 19/13 (2014.01); H04N 19/12 (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)] 14 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;
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 scan order is determined differently, based on encoding information related to the current block, as one of a plurality of scan order candidates pre-defined in a decoding apparatus,
wherein the encoding information includes a transform skip flag indicating whether the inverse-transform is skipped on the current block,
wherein the inverse-transform is adaptively performed on the inverse-quantized residual coefficient based on the transform skip flag,
wherein the plurality of the scan order candidates includes an up-right diagonal scan order and a bottom-left diagonal scan order.