US 12,250,407 B2
Image decoding method and device therefor
Jungah Choi, Seoul (KR); Sunmi Yoo, Seoul (KR); Junghak Nam, Seoul (KR); Jin Heo, Seoul (KR); Jangwon Choi, Seoul (KR); and Seunghwan Kim, Seoul (KR)
Assigned to LG Electronics Inc., Seoul (KR)
Appl. No. 17/916,466
Filed by LG Electronics Inc., Seoul (KR)
PCT Filed Mar. 30, 2021, PCT No. PCT/KR2021/003895
§ 371(c)(1), (2) Date Sep. 30, 2022,
PCT Pub. No. WO2021/201550, PCT Pub. Date Oct. 7, 2021.
Claims priority of provisional application 63/003,223, filed on Mar. 31, 2020.
Prior Publication US 2023/0164355 A1, May 25, 2023
Int. Cl. H04N 19/60 (2014.01); H04N 19/11 (2014.01); H04N 19/124 (2014.01); H04N 19/176 (2014.01)
CPC H04N 19/60 (2014.11) [H04N 19/11 (2014.11); H04N 19/124 (2014.11); H04N 19/176 (2014.11)] 11 Claims
OG exemplary drawing
 
1. An image decoding method performed by a decoding apparatus, the method comprising:
obtaining a dependent quantization enabled flag for whether dependent quantization is enabled;
obtaining a sign data hiding enabled flag for whether sign data hiding is enabled;
obtaining, based on the dependent quantization enabled flag and the sign data hiding enabled flag, a Transform Skip Residual Coding (TSRC) disabled flag indicating whether a TSRC syntax is used for a current block;
obtaining residual information for the current block from one of a residual coding syntax or the TSRC syntax in a bitstream, the one of the residual coding syntax or the TSRC syntax being determined based on the TSRC disabled flag;
deriving a residual sample of the current block based on the residual information; and
generating a reconstructed picture based on the residual sample,
wherein the TSRC disabled flag is obtained from the bitstream based on the dependent quantization enabled flag having a value of 0 and the sign data hiding enabled flag having a value of 0.