Patent ID: 8189672

Claim:
A method for interpolating chrominance signals during video encoding/decoding, the method comprising the steps of: accessing a memory unit so as to load an integer pixel value with regard to a plurality of motion compensation blocks; searching for a location of a motion vector so as to perform sub-pixel interpolation of chrominance signals regarding the blocks; performing ¼ sub-pixel interpolation when the motion vector indicates a ⅛ location pixel with regard to the pixels, by converting the ⅛ location pixel into a ¼ location pixel as: ¼ MV =(⅛ MV+ 1)>>1, wherein “>>” refers to rightward bit-shift; and performing ¼ sub-pixel interpolation by means of row-based and column-based shifting when the motion vector indicates a ¼ location pixel with regard to the blocks.