Patent ID: 7630566
Filing Date: 2009-12-08
Classification: G06T,H04N

Abstract:
1. A method for performing motion estimation and compensation for a current block of video data to be compressed, said method comprising: selecting, by an encoder, a particular phase of a plurality of phases of a polyphase filter based on a desired fractional pixel position, by selecting coefficients for a particular one of the phases that corresponds to the particular one of the plurality of fractional positions between pixel positions, wherein the polyphase filter comprises six or more taps, wherein the plurality of phases correspond to fractional positions between two adjacent pixels comprising at least ¼ and ¾ of the two adjacent pixel positions; selecting a reference block of video data based on said current block of video data; generating a set of estimated blocks of video data, having said fractional pixel resolution, based on said reference block of video data and said polyphase filter; and selecting an estimated block of video data based on said current block of video data and said set of estimated blocks of video data.