US 11,956,458 B2
Image decoding method and device for same
Jungah Choi, 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 Aug. 4, 2023, as Appl. No. 18/230,286.
Application 18/230,286 is a continuation of application No. 17/849,516, filed on Jun. 24, 2022, granted, now 11,765,375.
Application 17/849,516 is a continuation of application No. PCT/KR2020/015323, filed on Nov. 4, 2020.
Claims priority of provisional application 62/959,760, filed on Jan. 10, 2020.
Prior Publication US 2024/0022749 A1, Jan. 18, 2024
This patent is subject to a terminal disclaimer.
Int. Cl. H04N 19/46 (2014.01); H04N 19/176 (2014.01); H04N 19/186 (2014.01); H04N 19/70 (2014.01)
CPC H04N 19/46 (2014.11) [H04N 19/176 (2014.11); H04N 19/186 (2014.11); H04N 19/70 (2014.11)] 12 Claims
OG exemplary drawing
 
1. An image decoding method performed by a decoding apparatus, the method comprising:
obtaining image information including a Block-based Delta Pulse Code Modulation (BDPCM) enabled flag;
generating prediction samples for a current block based on the image information; and
generating a reconstructed picture based on the prediction samples,
wherein the BDPCM enabled flag is a flag indicating whether BDPCM is enabled for both a luma block and a chroma block within a current sequence or not,
wherein obtaining the image information comprises,
obtaining, in response to a case where the BDPCM enabled flag indicates that the BDPCM is enabled for both the luma block and the chroma block within the current sequence, a BDPCM luma flag indicating whether the BDPCM is applied to a current luma block belonging to the current block; and
obtaining, in response to the case where the BDPCM enabled flag indicates that the BDPCM is enabled for both the luma block and the chroma block within the current sequence, a BDPCM chroma flag indicating whether the BDPCM is applied to current chroma blocks belonging to the current block.