Patent ID: 9547886
Date: 2017-01-17
CPC Classifications: G06F,G06T,H04N

Claim:
1. A method of motion compensation, the method comprising: determining, in a luma reference picture, a luma reference block for prediction of a current block by using a luma motion vector; generating a luma sample of a 2/4-pixel location included in the luma reference block, by applying an 8-tap interpolation filter to luma samples of an integer pixel location of the luma reference picture; generating a luma sample of a 1/4-pixel location or a 3/4-pixel location included in the luma reference block, by applying an interpolation filter to the luma samples of the integer pixel location of the luma reference picture without using the generated luma sample of the 2/4-pixel location; determining, in a chroma reference picture, a chroma reference block for prediction of the current block by using a chroma motion vector; and generating a chroma sample of a 4/8-pixel location included in the chroma reference block, by applying a 4-tap interpolation filter to chroma samples of an integer pixel location of the chroma reference picture, wherein the 8-tap interpolation filter comprises eight filter coefficients, and the 4-tap interpolation filter comprises four filter coefficients.