Patent ID: 9729893
Date: 2017-08-08
CPC Classifications: H04N

Claim:
1. A method of decoding a video signal having a current block to be decoded with a decoding apparatus, comprising: obtaining a motion vector of the current block based on a motion vector predictor and a motion vector difference, the motion vector difference specifying a difference between the motion vector and the motion vector predictor; selecting a reference picture of the current block using a reference index of the current block; determining a reference block in the reference picture by using the motion vector of the current block; generating reference samples in the reference block, obtaining prediction samples of the current block by using the reference samples, wherein coefficients of the vertical interpolation filter defined for each of the two quarter position samples and the half position sample are different from each other, and wherein the first shifting value is determined based on a bit depth of a luma component while the second shifting value has a fixed value.