US 12,250,402 B2
Method and system of video coding using a subset of available intra prediction modes for multiple reference lines
Liang Zhao, Sunnyvale, CA (US); Xin Zhao, San Diego, CA (US); and Shan Liu, San Jose, CA (US)
Assigned to TENCENT AMERICA LLC, Palo Alto, CA (US)
Filed by Tencent America LLC, Palo Alto, CA (US)
Filed on Nov. 30, 2022, as Appl. No. 18/072,054.
Application 18/072,054 is a continuation of application No. 17/079,417, filed on Oct. 23, 2020, granted, now 11,553,208.
Claims priority of provisional application 62/941,342, filed on Nov. 27, 2019.
Prior Publication US 2023/0089932 A1, Mar. 23, 2023
Int. Cl. H04N 19/593 (2014.01); H04N 19/176 (2014.01); H04N 19/184 (2014.01); H04N 19/44 (2014.01)
CPC H04N 19/593 (2014.11) [H04N 19/176 (2014.11); H04N 19/184 (2014.11); H04N 19/44 (2014.11)] 20 Claims
OG exemplary drawing
 
1. A video decoding method, comprising:
obtaining a bitstream including a plurality of coded frames of a video signal;
decoding each of the plurality of coded frames into a plurality of coding tree units (CTUs) and each of the plurality of CTUs into a plurality of residual blocks; and
reconstructing a current block for a residual block of the plurality of residual blocks using a multiple reference line intra prediction (MRLP) mode and reference samples included in each coded frame, including:
when a reference line for the residual block is an adjacent reference line for the residual block, selecting an intra prediction mode from a first allowed intra prediction mode set (AIPM); and
when the reference line for the residual block is not the adjacent reference line for the residual block, selecting the intra prediction mode from a second AIPM, wherein the second AIPM is a subset of the first AIPM.