CPC H04N 19/105 (2014.11) [H04N 19/132 (2014.11); H04N 19/146 (2014.11); H04N 19/159 (2014.11); H04N 19/176 (2014.11); H04N 19/513 (2014.11)] | 20 Claims |
1. A video encoding method comprising:
obtaining a first array of first-component gradients based on a first prediction signal array from a first reference picture;
obtaining a second array of first-component gradients based on a second prediction signal array from a second reference picture;
obtaining a first-component intermediate parameter array including performing a right bit shift on a sum of the first array of first-component gradients and the second array of first-component gradients;
obtaining at least a first-component motion refinement based at least in part on the first-component intermediate parameter array; and
generating a prediction of a current block in a video with bi-directional optical flow using at least the first-component motion refinement.
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