Patent ID: 8073054
Filing Date: 2011-12-06
Classification: H04N

Abstract:
1. A motion estimation unit for estimating a current motion vector for a group of pixels of an image, comprising: a generating unit for generating a set of candidate motion vectors for the group of pixels, with the candidate motion vectors being extracted from a set of previously estimated motion vectors; a match error unit for calculating match errors of respective candidate motion vectors; and a selector for selecting the current motion vector from the candidate motion vectors by means of comparing the match errors of the respective candidate motion vectors, characterized in that the motion estimation unit is arranged to add a further candidate motion vector to the set of candidate motion vectors by calculating the further candidate motion vector on basis of a first motion vector and a second motion vector, both belonging to the set of previously estimated motion vectors wherein the motion estimation unit calculates the further candidate motion vector on basis of the first motion vector and the second motion vector, with the first motion vector belonging to a first forward motion vector field and the second motion vector belonging to a second forward motion vector field, with the first forward motion vector field and the second forward motion vector field being different; and wherein the motion estimation unit arranges to calculate the further candidate motion vector by means of calculating a difference between the second motion vector and the first motion vector.