US 11,870,981 B2
Video encoding method and device and video decoding method and device
Narae Choi, Suwon-si (KR); Minsoo Park, Suwon-si (KR); Minwoo Park, Suwon-si (KR); Seungsoo Jeong, Suwon-si (KR); Kiho Choi, Suwon-si (KR); Woongil Choi, Suwon-si (KR); Anish Tamse, Suwon-si (KR); and Yinji Piao, Suwon-si (KR)
Assigned to SAMSUNG ELECTRONICS CO., LTD., Suwon-si (KR)
Filed by SAMSUNG ELECTRONICS CO., LTD., Suwon-si (KR)
Filed on Apr. 4, 2022, as Appl. No. 17/712,714.
Application 17/712,714 is a continuation of application No. 17/042,461, granted, now 11,297,315, previously published as PCT/KR2019/004966, filed on Apr. 24, 2019.
Claims priority of provisional application 62/661,890, filed on Apr. 24, 2018.
Prior Publication US 2022/0232210 A1, Jul. 21, 2022
This patent is subject to a terminal disclaimer.
Int. Cl. H04N 19/11 (2014.01); H04N 19/105 (2014.01); H04N 19/132 (2014.01); H04N 19/159 (2014.01); H04N 19/176 (2014.01)
CPC H04N 19/11 (2014.11) [H04N 19/105 (2014.11); H04N 19/132 (2014.11); H04N 19/159 (2014.11); H04N 19/176 (2014.11)] 2 Claims
OG exemplary drawing
 
1. A video decoding method comprising:
obtaining, from a bitstream, intra prediction mode information indicating an intra prediction mode of a current block from among a plurality of intra prediction modes including a first lower-left direction and a first upper-right direction;
when a width of the current block is greater than a height of the current block and the intra prediction mode indicates the first lower-left direction, replacing the intra prediction mode with a second intra prediction mode indicating a second upper-right direction;
when the height of the current block is greater than the width of the current block and first intra prediction mode indicates the first upper-right direction, replacing the intra prediction mode with a second intra prediction mode indicating a second lower-left direction; and
obtaining a prediction sample of pixel comprised in the current block by performing intra prediction using the second intra prediction mode,
wherein, when a value of the intra prediction mode is A (where A is an integer), the second intra prediction mode is obtained by adding a predetermined value to A or subtracting a predetermined value from A.