US 12,256,063 B2
Intra prediction-based video encoding/decoding method and device
Ki Baek Kim, Daejeon (KR)
Assigned to B1 INSTITUTE OF IMAGE TECHNOLOGY, INC., Seoul (KR)
Filed by B1 INSTITUTE OF IMAGE TECHNOLOGY, INC., Seoul (KR)
Filed on May 1, 2023, as Appl. No. 18/310,013.
Application 18/310,013 is a continuation of application No. 17/165,075, filed on Feb. 2, 2021, granted, now 11,677,933.
Application 17/165,075 is a continuation of application No. 17/079,784, filed on Oct. 26, 2020, granted, now 10,951,886, issued on Mar. 16, 2021.
Application 17/079,784 is a continuation of application No. PCT/KR2019/018740, filed on Dec. 30, 2019.
Claims priority of application No. 10-2018-0173164 (KR), filed on Dec. 28, 2018; and application No. 10-2018-0173228 (KR), filed on Dec. 29, 2018.
Prior Publication US 2023/0269370 A1, Aug. 24, 2023
This patent is subject to a terminal disclaimer.
Int. Cl. H04N 19/105 (2014.01); H04N 19/159 (2014.01); H04N 19/176 (2014.01); H04N 19/184 (2014.01); H04N 19/186 (2014.01); H04N 19/46 (2014.01); H04N 19/593 (2014.01); H04N 19/96 (2014.01)
CPC H04N 19/105 (2014.11) [H04N 19/159 (2014.11); H04N 19/176 (2014.11); H04N 19/184 (2014.11); H04N 19/186 (2014.11); H04N 19/46 (2014.11); H04N 19/593 (2014.11); H04N 19/96 (2014.11)] 8 Claims
OG exemplary drawing
 
1. A method of decoding an image based on an intra prediction with a decoding apparatus, comprising:
determining an intra prediction mode of a current chroma block; and
predicting the current chroma block based on the intra prediction mode of the current chroma block,
wherein determining an intra prediction mode of the current chroma block comprises:
selecting one of a first mode group and a second mode group based on a first flag signaled from the encoding apparatus, the first mode group including only inter-components reference-based prediction modes, the second mode group including 67 intra prediction modes pre-defined in the decoding apparatus, the 67 intra prediction modes being composed of 2 non-directional modes and 65 directional modes, and the first flag specifying whether the intra prediction mode of the chroma block belongs to the first mode group or the second mode group; and
deriving the intra prediction mode of the current chroma block from the selected mode group.