Method and apparatus for encoding and decoding motion information

An apparatus for video encoding or decoding, comprising at least a processor configured to:

• determine, for a block in a picture, a first motion vector candidate for a first reference picture in a first reference picture list;
• determine, for the block in the picture, a second motion vector candidate for a second reference picture in a second reference picture list;
• select one of the first motion vector candidate and the second motion vector candidate based on a criterion, wherein said criterion is based on the determining of both the first motion vector candidate and the second motion vector candidate;
• include the selected one of the first motion vector candidate and the second motion vector candidate in a list of motion vector candidates for the block, wherein the other one of the first motion vector candidate and the second motion vector candidate is not included in the list of motion vector candidates;
• determine a motion vector for the block based on the list of motion vector candidates;
• and
• encode or decode the block based on the determined motion vector.

A non-transitory computer-readable medium including instructions for causing one or more processors to perform:

• determining, for a block in a picture, a first motion vector candidate for a first reference picture in a first reference picture list;
• determining, for the block in the picture, a second motion vector candidate for a second reference picture in a second reference picture list;
• selecting one of the first motion vector candidate and the second motion vector candidate based on a criterion, wherein said criterion is based on the determining of both the first motion vector candidate and the second motion vector candidate;
• including the selected one of the first motion vector candidate and the second motion vector candidate in a list of motion vector candidates for the block, wherein the other one of the first motion vector candidate and the second motion vector candidate is not included in the list of motion vector candidates;
• determining a motion vector for the block based on the list of motion vector candidates;
• and
• encoding or decoding the block based on the determined motion vector.