US 12,149,732 B2
Systems and methods for improving warp extend and warp delta signaling with backup candidates
Han Gao, Palo Alto, CA (US); Xin Zhao, Palo Alto, CA (US); Liang Zhao, Palo Alto, CA (US); and Shan Liu, Palo Alto, CA (US)
Assigned to TENCENT AMERICA LLC, Palo Alto, CA (US)
Filed by TENCENT AMERICA LLC, Palo Alto, CA (US)
Filed on Mar. 22, 2023, as Appl. No. 18/124,764.
Claims priority of provisional application 63/427,412, filed on Nov. 22, 2022.
Prior Publication US 2024/0171767 A1, May 23, 2024
Int. Cl. H04N 19/52 (2014.01); H04N 19/105 (2014.01); H04N 19/139 (2014.01); H04N 19/159 (2014.01); H04N 19/172 (2014.01); H04N 19/176 (2014.01); H04N 19/85 (2014.01)
CPC H04N 19/52 (2014.11) [H04N 19/105 (2014.11); H04N 19/139 (2014.11); H04N 19/159 (2014.11); H04N 19/172 (2014.11); H04N 19/176 (2014.11); H04N 19/85 (2014.11)] 20 Claims
OG exemplary drawing
 
1. A method of video decoding performed at a computing system having memory and one or more processors, the method comprising:
obtaining encoded video data comprising a plurality of blocks;
obtaining a motion vector predictor (MVP) candidate block from a MVP list based on a MVP index;
in accordance with a determination that a block of the plurality of blocks is designated for a warp extend mode, determining whether the MVP candidate block is suitable for the warp extend mode;
in accordance with a determination that the MVP candidate block is not suitable for the warp extend mode, identifying a backup MVP candidate block that is suitable for the warp extend mode;
obtaining a warp model from the backup MVP candidate block; and
performing a warp extend operation on the block using the warp model.