US 11,057,619 B2
Image coding method and apparatus based on intra prediction using MPM list
Ling Li, Seoul (KR); Jaehyun Lim, Seoul (KR); Jin Heo, 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 7, 2020, as Appl. No. 16/868,768.
Application 16/868,768 is a continuation of application No. PCT/KR2020/003921, filed on Mar. 23, 2020.
Claims priority of provisional application 62/822,874, filed on Mar. 23, 2019.
Prior Publication US 2020/0304780 A1, Sep. 24, 2020
Int. Cl. H04N 11/02 (2006.01); H04N 19/105 (2014.01); H04N 19/176 (2014.01); H04N 19/159 (2014.01)
CPC H04N 19/105 (2014.11) [H04N 19/159 (2014.11); H04N 19/176 (2014.11)] 20 Claims
OG exemplary drawing
 
1. An image decoding method performed by a decoding apparatus, the method comprising:
receiving intra prediction information comprising most probable mode (MPM) flag information related to whether to derive an intra prediction mode for a current block based on MPM candidates for the current block, planar flag information related to whether to determine the intra prediction mode for the current block as a planar mode, and MPM index information related to one of 5 MPM candidates other than the planar mode among the MPM candidates for the current block;
deriving the intra prediction mode for the current block based on at least one of a value of the MPM flag information, a value of the planar flag information, or a value of the MPM index information;
deriving a predicted block for the current block based on the intra prediction mode for the current block; and
generating a reconstructed picture based on the predicted block,
wherein the MPM flag information is configured in a coding unit syntax for the current block,
wherein based on the value of the MPM flag information representing that the intra prediction mode for the current block is derived based on the MPM candidates, the planar flag information is configured in the coding unit syntax, and
wherein based on the value of the planar flag information representing that the intra prediction mode for the current block is not as the planar mode, the MPM index information is configured in the coding unit syntax.