Method and apparatus for video coding

An apparatus, comprising:

• processing circuitry configured to:
• divide a current block into a plurality of sub-blocks;
• derive a plurality of pieces of sub-block motion information for the plurality of sub-blocks;
• generate predicted sub-block samples for the sub-blocks according to the pieces of sub-block motion information;
• generate a predicted block for the current block according to a combination of the predicted sub-block samples;
• select a piece of the sub-block motion information from the pieces of sub-block motion information as representative motion information for the current block;
• and
• store the representative motion information in a history-based motion vector prediction (HMVP) buffer.

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

• dividing a current block into a plurality of sub-blocks;
• deriving a plurality of pieces of sub-block motion information for the plurality of sub-blocks;
• generating predicted sub-block samples for the sub-blocks according to the pieces of sub-block motion information;
• generating a predicted block for the current block according to a combination of the predicted sub-block samples;
• selecting a piece of the sub-block motion information from the pieces of sub-block motion information as representative motion information for the current block;
• and
• storing the representative motion information in a history-based motion vector prediction (HMVP) buffer.