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 |
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.
|