US 12,483,705 B2
Image decoding method and device
Sunmi Yoo, Seoul (KR); Junghak Nam, Seoul (KR); and Jungah Choi, Daejeon (KR)
Assigned to LG ELECTRONICS INC., Seoul (KR)
Appl. No. 18/833,579
Filed by LG ELECTRONICS INC., Seoul (KR)
PCT Filed Jan. 10, 2023, PCT No. PCT/KR2023/000455
§ 371(c)(1), (2) Date Jul. 26, 2024,
PCT Pub. No. WO2023/146164, PCT Pub. Date Aug. 3, 2023.
Claims priority of provisional application 63/303,920, filed on Jan. 27, 2022.
Prior Publication US 2025/0133212 A1, Apr. 24, 2025
Int. Cl. H04N 7/12 (2006.01); H04N 19/105 (2014.01); H04N 19/132 (2014.01); H04N 19/176 (2014.01)
CPC H04N 19/132 (2014.11) [H04N 19/105 (2014.11); H04N 19/176 (2014.11)] 14 Claims
OG exemplary drawing
 
1. A method for an image decoding, the method performed by a decoding apparatus and comprising:
deriving neighboring samples for a sign prediction of a current block;
deriving costs of sign combination candidates of transform coefficients of the current block based on the neighboring samples;
predicting signs of the transform coefficients from the sign combination candidates based on the costs;
deriving residual samples of the current block based on the predicted signs; and
generating a reconstructed picture based on the residual samples.