US 12,262,018 B2
Video decoding method using simplified residual data coding in video coding system, and apparatus therefor
Jungah Choi, Seoul (KR); Jin Heo, Seoul (KR); Sunmi Yoo, Seoul (KR); Jaehyun Lim, Seoul (KR); Jangwon Choi, Seoul (KR); and Seunghwan Kim, Seoul (KR)
Assigned to LG Electronics Inc., Seoul (KR)
Filed by LG ELECTRONICS INC., Seoul (KR)
Filed on May 3, 2023, as Appl. No. 18/142,804.
Application 18/142,804 is a continuation of application No. 17/879,686, filed on Aug. 2, 2022, granted, now 11,683,495.
Application 17/879,686 is a continuation of application No. 17/674,595, filed on Feb. 17, 2022, granted, now 11,451,785, issued on Sep. 20, 2022.
Application 17/674,595 is a continuation of application No. PCT/KR2020/011612, filed on Aug. 31, 2020.
Claims priority of provisional application 62/894,752, filed on Aug. 31, 2019.
Prior Publication US 2023/0276052 A1, Aug. 31, 2023
This patent is subject to a terminal disclaimer.
Int. Cl. H04N 19/132 (2014.01); H04N 19/176 (2014.01); H04N 19/18 (2014.01); H04N 19/46 (2014.01); H04N 19/70 (2014.01)
CPC H04N 19/132 (2014.11) [H04N 19/176 (2014.11); H04N 19/18 (2014.11); H04N 19/46 (2014.11); H04N 19/70 (2014.11)] 4 Claims
OG exemplary drawing
 
1. An image decoding method, performed by a decoding apparatus, the method comprising:
obtaining a transform skip flag for a current block;
based on a value of the transform skip flag being 1, obtaining residual information of the current block;
deriving residual samples of the current block based on the residual information; and
generating a reconstructed picture based on the residual samples,
wherein the obtaining the residual information comprises:
obtaining syntax elements for a first transform coefficient to an n-th transform coefficient of the current block; and
obtaining syntax elements for an n+1th transform coefficient to a last transform coefficient of the current block,
wherein a number of context-coded syntax elements for the first transform coefficient to the n-th transform coefficient is equal to a maximum number of context-coded bins of the current block,
wherein the syntax elements for the first transform coefficient to the n-th transform coefficient are syntax elements according to a first residual data coding structure of Transform Skip Residual Coding (TSRC),
wherein the syntax elements for the n+1th transform coefficient to the last transform coefficient are syntax elements according to a second residual data coding structure of the TSRC,
wherein the syntax elements according to the first residual data coding structure include a significant coefficient flag, a sign flag, a first coefficient level flag, and a parity level flag for a transform coefficient, and
wherein the syntax elements according to the second residual data coding structure include coefficient level information and the sign flag for the transform coefficient.