Video coding based on multiple sets of subblock motion vectors

An apparatus, comprising:

• processing circuitry configured to:
• determine first motion vectors for a plurality of subblocks of a current block based on a first relative position in each subblock of the plurality of subblocks;
• determine second motion vectors for the plurality of subblocks based on a second relative position in each subblock of the plurality of subblocks;
• obtain a first set of predicted samples for the current block based on the first motion vectors of the plurality of subblocks;
• obtain a second set of predicted samples for the current block based on the second motion vectors of the plurality of subblocks;
• and
• obtain a third set of predicted samples for the current block based on the first set of predicted samples and the second set of predicted samples.

A non-transitory computer-readable medium storing instructions which when executed by a computer for video decoding cause the computer to perform:

• determining first motion vectors for a plurality of subblocks of a current block based on a first relative position in each subblock of the plurality of subblocks;
• determining second motion vectors for the plurality of subblocks based on a second relative position in each subblock of the plurality of subblocks;
• obtaining a first set of predicted samples for the current block based on the first motion vectors of the plurality of subblocks;
• obtaining a second set of predicted samples for the current block based on the second motion vectors of the plurality of subblocks;
• and
• obtaining a third set of predicted samples for the current block based on the first set of predicted samples and the second set of predicted samples.