METHOD AND APPARATUS FOR SUB-PIXEL INTERPOLATION

摘要

There is provided a method and apparatus for decoding an encoded video stream. The method comprises receiving an indication of a motion vector for a current picture, the motion vector referring to a previously decoded picture. The method also comprises applying a mask, the mask defining a subset of sub-pixel positions of the previously decoded picture which may be referenced by the motion vector for the current picture. The method further comprises identifying at least one pixel value for the current picture by referring to the value of at least one pixel in an allowed pixel position of the previously decoded picture.