US 11,743,496 B2
Intra prediction device and method involving matrix-based intra prediction
Jangwon Choi, Seoul (KR); Seunghwan Kim, Seoul (KR); Jin Heo, Seoul (KR); Jungah Choi, Seoul (KR); and Sunmi Yoo, Seoul (KR)
Assigned to LG Electronics Inc., Seoul (KR)
Filed by LG ELECTRONICS INC., Seoul (KR)
Filed on Feb. 22, 2022, as Appl. No. 17/677,602.
Application 17/677,602 is a continuation of application No. PCT/KR2020/011239, filed on Aug. 24, 2020.
Claims priority of provisional application 62/890,584, filed on Aug. 22, 2019.
Prior Publication US 2022/0174316 A1, Jun. 2, 2022
Int. Cl. H04N 19/593 (2014.01); H04N 19/105 (2014.01); H04N 19/132 (2014.01); H04N 19/159 (2014.01); H04N 19/176 (2014.01); H04N 19/18 (2014.01); H04N 19/59 (2014.01); H04N 19/70 (2014.01)
CPC H04N 19/593 (2014.11) [H04N 19/105 (2014.11); H04N 19/132 (2014.11); H04N 19/159 (2014.11); H04N 19/176 (2014.11); H04N 19/18 (2014.11); H04N 19/59 (2014.11); H04N 19/70 (2014.11)] 13 Claims
OG exemplary drawing
 
1. An image decoding method performed by a decoding apparatus, the method comprising:
obtaining image information including residual information and prediction-related information through a bitstream;
deriving transform coefficients based on the residual information;
generating residual samples for a current block based on the transform coefficients;
deriving an intra prediction mode for the current block based on the prediction-related information;
generating prediction samples for the current block based on the intra prediction mode; and
generating reconstructed samples for the current block based on the prediction samples and the residual samples,
wherein the image information includes flag information related to whether an intra prediction mode type for the current block is a matrix-based intra prediction (MIP), wherein for the current block of which size is equal to 64×8, the flag information related to whether the intra prediction mode type for the current block is the MIP is included in the image information,
wherein the intra prediction mode type for the current block is determined as the MIP based on the flag information,
wherein based on the flag information related to that the intra prediction mode type for the current block is the MIP, the image information includes MIP mode information, wherein the MIP mode information is related to an MIP mode applied to the current block and the MIP mode is used to derive an MIP matrix for the current block,
wherein the MIP matrix is derived based on (i) a width and a height of the current block for the MIP and (ii) the MIP mode information,
wherein MIP samples for the current block are generated based on the MIP matrix, and
wherein the prediction samples for the current block are generated based on the MIP samples.