Patent ID: 6438170
Filing Date: 2002-08-20
Classification: H04N

Abstract:
Apparatus, for providing motion estimation using block matching, comprising:large-block matching means for receiving a picture signal and producing block motion vectors, each corresponding to a block of pixels, and related block errors; memory means which store said block motion vectors and said errors; error estimation means, in particular linear error interpolation means, which operate on stored error values corresponding to each four related block motion vectors which comprise the motion vector of a current block and the motion vectors of three blocks adjacent to said current block and which calculate for each pixel in said current block estimated errors, taking into account the position relative to a center point of the corresponding block including said pixel; comparing means which take the minimum of said estimated errors for each pixel; and selecting means for selecting in relation to said minimum the respective of said four block motion vectors as a final motion vector for the current pixel wherein said final motion vector for the current pixel included within the current block can be different than the final motion vector for another pixel also included within the current block.