ArentFox Schiff LLP
Method and apparatus for video coding
Aspects of the disclosure provide methods and an apparatus that includes processing circuitry that decodes coding information of a current block (CB) from a coded video bitstream. The processing circuitry generates initial predictions for samples in a subblock in the CB based on an inter prediction mode indicated by the coding information. For one of the samples, the processing circuitry determines a motion vector (MV) refinement (MVR). An absolute value of an x component or a y component of the MVR is one of: (i) 2N1 and (ii) a sum or a difference of 2N1 and 2M1. N1 and M1 are integers. The processing circuitry generates a prediction refinement based on the MVR and spatial gradients for the one of the samples, and generates a refined prediction based on the initial prediction of the one of the samples and the prediction refinement.
TENCENT AMERICA LLC
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Xiaozhong Guichun Xiang Shan
Xu Li Li Liu