Patent ID: 11949902
Assignee: TENCENT AMERICA LLC
Field: Audio-visual technology (Electrical engineering)
Classification: CPC H | IPC H

Claim 18:
19. A non-transitory computer-readable storage medium storing instructions which when executed by a processor cause the processor to perform:
determining an inter prediction mode for a current block;
generating initial predictions for samples in a subblock of a plurality of subblocks in the current block based on the inter prediction mode; and
for one of the samples in the subblock,
determining a motion vector (MV) refinement (MVR), an absolute value of a first component of the MVR being one of: (i) 2N1 and (ii) a sum or a difference of 2N1 and 2M1 N1 and M1 being integers, the first component of the MVR being in a first direction that is one of an x direction and a y direction;
generating a prediction refinement based on the MVR and spatial gradients for the one of the samples, the spatial gradients being based on the initial predictions for the samples; and
encoding the current block in a bitstream based on the initial prediction of the one of the samples and the prediction refinement.