METHOD AND DEVICE FOR ROUNDING COORDINATE VALUE OF NON-FULL PIXEL POSITION MOTION VECTOR

摘要

Embodiments of the present application disclose a method and an apparatus for rounding a coordinate value of a non-integer pixel position motion vector during a video coding and decoding process. The method includes: performing a rounding operation on a coordinate value of a non-integer pixel position motion vector, where the rounding operation includes: for each dimension of coordinates of the non-integer pixel position motion vector, when a coordinate in the dimension is a non-integer pixel position, rounding the coordinate value of the non-integer pixel position motion vector in the dimension to one of integer pixel coordinate positions A and B if distances from the coordinate of the non-integer pixel position motion vector in the dimension to the integer pixel coordinate positions A and B adjacent to the non-integer pixel position in the dimension are the same, where an integer pixel coordinate position is determined by a sign of the coordinate value of the non-integer pixel position motion vector in the dimension. Therefore, the problem of high complexity in selecting an optimal motion vector from a candidate motion vector set in the prior art is solved and better coding performance is maintained.