US 12,149,682 B2
Video coding method and system based on multiple reference line intra prediction
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 Oct. 8, 2022, as Appl. No. 17/962,464.
Application 17/962,464 is a continuation of application No. 17/077,872, filed on Oct. 22, 2020, granted, now 11,558,605.
Claims priority of provisional application 62/964,992, filed on Jan. 23, 2020.
Prior Publication US 2023/0037509 A1, Feb. 9, 2023
This patent is subject to a terminal disclaimer.
Int. Cl. H04N 19/105 (2014.01); H04N 19/132 (2014.01); H04N 19/159 (2014.01); H04N 19/176 (2014.01); H04N 19/46 (2014.01); H04N 19/80 (2014.01)
CPC H04N 19/105 (2014.11) [H04N 19/132 (2014.11); H04N 19/159 (2014.11); H04N 19/176 (2014.11); H04N 19/46 (2014.11); H04N 19/80 (2014.11)] 19 Claims
OG exemplary drawing
 
1. A video decoding method, comprising:
receiving a video bitstream that comprises a set of coding blocks;
recovering a coding block of the set of coding blocks based on a multiple reference line intra prediction (MRLP), a set of above-side reference lines, and a set of left-side reference lines, wherein:
a super block comprises a plurality of coding blocks including the coding block; and
performing the MRLP includes, when a first line of the super block is located in the coding block:
identifying a reference line index for the MRLP, the reference line index indicating a non-adjacent reference line position;
selecting a non-adjacent above-side reference line from the set of above-side reference lines according to the reference line index; and
determining values of reference samples of the non-adjacent above-side reference line by projecting, along an intra prediction direction, reference samples of an adjacent above-side reference line of the set of above-side reference lines.