Encoding method, decoding method, and storage medium

An encoding method, performed by an encoder and comprising:

• determining a first difference in sample values between a first reference block pointed to by a first candidate motion vector (MV) of a current block and a second reference block pointed to by a second candidate MV of the current block;
• determining a second difference in sample values between a template of the current block and a template of the first reference block;
• determining a third difference in sample values between the template of the current block and a template of the second reference block;
• obtaining a first prediction MV and a second prediction MV of the current block by performing motion estimation on the current block at least according to the first difference, the second difference, and the third difference;
• and
• obtaining a prediction block of the current block by performing motion compensation on the current block according to the first prediction MV and the second prediction MV.

A non-transitory computer-readable storage medium storing a computer program and a bitstream, wherein when executed by a processor, the computer program causes the processor to implement an encoding method to generate the bitstream, the encoding method comprising:

• determining a first difference in sample values between a first reference block pointed to by a first candidate motion vector (MV) of a current block and a second reference block pointed to by a second candidate MV of the current block;
• determining a second difference in sample values between a template of the current block and a template of the first reference block;
• determining a third difference in sample values between the template of the current block and a template of the second reference block;
• obtaining a first prediction MV and a second prediction MV of the current block by performing motion estimation on the current block at least according to the first difference, the second difference, and the third difference;
• and
• obtaining a prediction block of the current block by performing motion compensation on the current block according to the first prediction MV and the second prediction MV.