Selecting a coding method for suffix values for displacement vector differences based on value intervals

A video encoding method, comprising:

• determining, from among plural value intervals, a first value interval to which an absolute value of a displacement vector difference of a current encoding unit in a first direction belongs;
• determining, based on the first value interval, that the displacement vector difference in the first direction has a prefix value and a suffix value;
• determining, based on the first value interval, a first suffix encoding method for encoding the suffix value;
• performing encoding processing on the suffix value corresponding to the displacement vector difference in the first direction using the first suffix encoding method, to obtain a first suffix part;
• and
• performing encoding to generate a bitstream comprising the first suffix part.

A video decoding apparatus, comprising:

• processing circuitry configured to determine, from among plural value intervals, a first value interval to which an absolute value of a displacement vector difference of a current decoding unit in a first direction belongs;
• determine, based on the first value interval, that the displacement vector difference in the first direction has a prefix value and a suffix value;
• determine, based on the first value interval, a first suffix decoding method for decoding the suffix value;
• perform decoding processing on a first suffix part in a bitstream using the first suffix decoding method, to obtain the suffix value corresponding to the displacement vector difference in the first direction;
• and
• determine, based on the prefix value and the suffix value, the displacement vector difference in the first direction.