Method and apparatus for determining motion vector of affine code block

An apparatus, comprising:

• at least one processor;
• and
• a memory having computer readable instructions stored thereon that, when executed by the at least one processor, causes the apparatus to:
• obtain a first motion vector of a first motion compensation unit included in an affine code block, the first motion compensation unit being a first motion compensation unit of a plurality of motion compensation units corresponding to a storage unit;
• determine a second motion vector based on the first motion vector, where a precision of the second motion vector matches a motion vector precision of the storage unit;
• determine a third motion vector based on the second motion vector, where there is a preset correspondence between the third motion vector and the second motion vector, and the third motion vector is used for subsequent encoding/decoding processing;
• and
• determine that a size of the storage unit is greater than that of the first motion compensation unit,
• wherein
• based on the determination that the size of the storage unit is greater than that of the first motion compensation unit, the preset correspondence facilitates determining a value of the third motion vector as being equal to an average value the second motion vector and a fourth motion vector of a second motion compensation unit of the plurality of motion compensation units corresponding to the storage unit, and
• the fourth motion vector is a motion vector of a second motion compensation unit of the plurality of motion compensation units corresponding to the storage unit other than the first motion compensation unit.