Patent ID: 9667963
Date: 2017-05-30
CPC Classifications: H04N

Claim:
1. A video encoding method using fractional-accuracy motion compensation, the method comprising: a step of generating using a video encoding apparatus processor multiple sets of weighted filter coefficients corresponding to multiple weighted interpolation filters from interpolation filter coefficients of multiple interpolation filters and multiple weight parameters, weights designated by each of the multiple weight parameters respectively corresponding to the multiple interpolation filters; a step of selecting using said video encoding apparatus processor a set of weighted filter coefficients which minimize prediction error energy in the fractional-accuracy motion compensation from among the multiple sets of the weighted filter coefficients, the selected set of the weighted filter coefficients corresponding to one of the multiple weighted interpolation filters; a step of interpolating fractional-accuracy pixels for a reference picture by application of an interpolation filter with the selected set of the weighted filter coefficients and encoding an input picture with the fractional-accuracy motion compensation; and a step of encoding using said video encoding apparatus processor a weight parameter used for generating the selected set of the weighted filter coefficients and the interpolation filter coefficients and adding an encoded weight parameter and encoded interpolation filter coefficients to an encoded bitstream.