CPC H04N 19/105 (2014.11) [H04N 19/117 (2014.11); H04N 19/119 (2014.11); H04N 19/132 (2014.11); H04N 19/176 (2014.11)] | 20 Claims |
1. A method of video processing, comprising:
determining a reference block for a current block;
performing a refinement process for prediction of the current block, based on the reference block; and
performing a conversion between the current block and a bitstream representation of a video including the current block, based on a result of the refinement process;
wherein, the refinement process comprises:
modifying the reference block into a modified reference block, and calculating a temporal gradient based on the modified reference block, or
calculating an original temporal gradient based on the reference block, and modifying the original temporal gradient into a modified temporal gradient,
wherein the step of modifying the reference block into a modified reference block comprises:
removing a mean value for the reference block,
wherein the mean value is removed for all reference blocks.
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