US 12,355,949 B2
Method and device for deriving intra-prediction mode
Jae Il Kim, Seoul (KR); Sun Young Lee, Seoul (KR); and Kyung Hwan Ko, Seoul (KR)
Assigned to SK TELECOM CO., LTD., Seoul (KR)
Filed by SK TELECOM CO., LTD., Seoul (KR)
Filed on Apr. 23, 2024, as Appl. No. 18/643,494.
Application 18/643,494 is a continuation of application No. 17/614,500, granted, now 11,991,350, previously published as PCT/KR2020/006823, filed on May 27, 2020.
Claims priority of application No. 10-2019-0061737 (KR), filed on May 27, 2019; and application No. 10-2019-0157997 (KR), filed on Dec. 2, 2019.
Prior Publication US 2024/0275950 A1, Aug. 15, 2024
This patent is subject to a terminal disclaimer.
Int. Cl. H04N 19/82 (2014.01); H04N 19/105 (2014.01); H04N 19/11 (2014.01); H04N 19/159 (2014.01); H04N 19/176 (2014.01)
CPC H04N 19/105 (2014.11) [H04N 19/11 (2014.11); H04N 19/159 (2014.11); H04N 19/176 (2014.11)] 10 Claims
OG exemplary drawing
 
1. A method for intra prediction of a current block of video data, comprising:
decoding reference line information indicating one of a plurality of reference lines to be referenced by the current block;
decoding, depending on the reference line information, intra subpartition information indicating whether an intra-subpartition is applied to the current block, wherein the intra subpartition information is decoded when one of the plurality of reference lines indicated by the reference line information is a reference line adjacent to the current block;
decoding, based on the reference line information indicating one of the plurality of reference lines, most probable mode (MPM) information indicating whether an intra-prediction mode of the current block is included in an MPM list, wherein the MPM information is decoded, regardless of whether the intra-subpartition is applied to the current block, when one of the plurality of reference lines indicated by the reference line information is the reference line adjacent to the current block;
decoding, depending on the reference line information and the MPM information, planar information indicating whether the intra-prediction mode of the current block is a planar mode, wherein the planar information is decoded when the intra-prediction mode of the current block is included in the MPM list and when one of the plurality of reference lines indicated by the reference line information is the reference line adjacent to the current block;
deriving the intra-prediction mode of the current block based at least in part on the planar information; and
generating a prediction block corresponding to the current block based on the derived intra-prediction mode of the current block,
wherein when the intra-subpartition is applied to the current block, generating the prediction block comprises:
dividing the current block into two or more subblocks; and
predicting the subblocks using the intra-prediction mode of the current block, respectively.