US 11,930,180 B2
Method and apparatus for intra-prediction coding of video data
Dong Gyu Sim, Seoul (KR); Joo Hyung Byeon, Seoul (KR); Sea Nae Park, Seoul (KR); Jun Taek Park, Seoul (KR); Seung Wook Park, Gyeonggi-do (KR); and Wha Pyeong Lim, Gyeonggi-do (KR)
Assigned to Hyundai Motor Company, Seoul (KR); Kia Motors Corporation, Seoul (KR); and Kwangwoon University Industry-Academic Collaboration Foundation, Seoul (KR)
Appl. No. 17/633,030
Filed by Hyundai Motor Company, Seoul (KR); Kia Motors Corporation, Seoul (KR); and Kwangwoon University Industry-Academic Collaboration Foundation, Seoul (KR)
PCT Filed Aug. 6, 2020, PCT No. PCT/KR2020/010371
§ 371(c)(1), (2) Date Feb. 4, 2022,
PCT Pub. No. WO2021/025478, PCT Pub. Date Feb. 11, 2021.
Claims priority of application No. 10-2019-0095449 (KR), filed on Aug. 6, 2019; application No. 10-2019-0097449 (KR), filed on Aug. 9, 2019; and application No. 10-2020-0098223 (KR), filed on Aug. 5, 2020.
Prior Publication US 2022/0279187 A1, Sep. 1, 2022
Int. Cl. H04N 19/132 (2014.01); H04N 19/105 (2014.01); H04N 19/159 (2014.01); H04N 19/176 (2014.01); H04N 19/186 (2014.01); H04N 19/70 (2014.01)
CPC H04N 19/132 (2014.11) [H04N 19/105 (2014.11); H04N 19/159 (2014.11); H04N 19/176 (2014.11); H04N 19/186 (2014.11); H04N 19/70 (2014.11)] 4 Claims
OG exemplary drawing
 
1. A method for decoding video data, the method comprising:
acquiring, from a bitstream, information on a luma prediction mode and information on a chroma prediction mode of a current coding block;
deriving a luma intra prediction type and luma intra prediction mode of the current coding block based on the information on the luma prediction mode, the luma intra prediction type comprising matrix-based intra prediction (MIP) and regular intra prediction;
determining a chroma intra prediction mode of the current coding block, based on the luma intra prediction type and luma intra prediction mode of the current coding block and the information on the chroma prediction mode; and
generating chroma prediction samples of the current coding block based on the chroma intra prediction mode of the current coding block;
wherein, the determining of a chroma intra prediction mode of the current coding block comprises:
if the information on the chroma prediction mode indicates DM (Direct mode), the luma intra prediction type of the current coding block is the matrix-based intra prediction, and a sampling format of the video data is 4:4:4,
determining that the chroma intra prediction type of the current coding block is the matrix-based intra prediction, and determining that the chroma intra prediction mode corresponding to the chroma intra prediction type of the current coding block is the same as a matrix-based intra prediction mode derived as the luma intra prediction mode of the current coding block.