US 11,800,100 B2
Method and apparatus for sub-block based temporal motion vector prediction
Xiaozhong Xu, State College, PA (US); Xiang Li, 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 Jul. 29, 2021, as Appl. No. 17/444,012.
Application 17/444,012 is a continuation of application No. 16/210,635, filed on Dec. 5, 2018, granted, now 11,109,025.
Claims priority of provisional application 62/680,468, filed on Jun. 4, 2018.
Prior Publication US 2021/0360245 A1, Nov. 18, 2021
This patent is subject to a terminal disclaimer.
Int. Cl. H04N 19/119 (2014.01); H04N 19/139 (2014.01); H04N 19/159 (2014.01); H04N 19/176 (2014.01); H04N 19/105 (2014.01); H04N 19/513 (2014.01)
CPC H04N 19/119 (2014.11) [H04N 19/105 (2014.11); H04N 19/139 (2014.11); H04N 19/159 (2014.11); H04N 19/176 (2014.11); H04N 19/521 (2014.11)] 20 Claims
OG exemplary drawing
 
1. A method of video decoding for a decoder, the method comprising:
acquiring a current picture from a coded video bitstream;
identifying, for a current block included in the current picture, a reference block included in a reference picture, the reference picture being different from the current picture, the current block being divided into a plurality of current sub-blocks (CBSBs) that are coded in an inter mode, the reference block having a plurality of reference sub-blocks (RBSBs), each CBSB corresponding to at least one RBSB;
determining whether a corresponding RBSB is coded in an intra prediction mode or an intra block copy mode;
in response to the corresponding RBSB of a respective CBSB of the plurality of CBSBs being coded in the intra prediction mode or the intra block copy mode, setting a first motion vector predictor of the respective CBSB to a zero motion vector; and
decoding the plurality of CBSBs by performing sub-block based temporal motion vector prediction based on first motion vector predictors of the plurality of CBSBs.