US 11,991,350 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)
Appl. No. 17/614,500
Filed by SK TELECOM CO., LTD., Seoul (KR)
PCT Filed May 27, 2020, PCT No. PCT/KR2020/006823
§ 371(c)(1), (2) Date Nov. 26, 2021,
PCT Pub. No. WO2020/242182, PCT Pub. Date Dec. 3, 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 2022/0224885 A1, Jul. 14, 2022
Int. Cl. 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 intra-subpartition is applied to the current block, wherein the intra subpartition information is decoded when one of a plurality of reference lines indicated by the reference line information is a reference line adjacent to the current block;
decoding, based on reference line information indicating one of a plurality of reference lines, most probable mode (MPM) information indicating whether an intra-prediction mode of a current block is included in an MPM list lacking a planar mode, wherein the MPM information is decoded, regardless of whether the intra-subpartition is applied to the current block, when one of a plurality of reference lines indicated by the reference line information is a 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 the 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 a plurality of reference lines indicated by the reference line information is a reference line adjacent to the current block; and
deriving the intra-prediction mode of the current block based on at least in part on the planar information,
wherein when the intra-subpartition is applied to the current block, the current block is divided into two or more subblocks which are predicted in the intra-prediction mode of the current block.