Patent ID: 6144699
Filing Date: 2000-11-07
Classification: H04N

Abstract:
A device for estimating motion between a current image and a previous image by block matching, the images being split into blocks, said device comprising:a processing circuit for a candidate motion vector, said processing circuit calculating errors between a block of the current image and a block designated by the candidate motion vector in the previous image, said processing circuit including a first input for successively receiving pixels of the current image being received according to a line scan and a second input for successively receiving corresponding pixels of the previous image identified by means of the associated candidate motion vector; andat least one memory device, wherein said processing circuit calculates partial sums at an end of a line of each block of the current image, said calculated partial sums corresponding to cumulated errors for its respective block, said processing circuit further including a third input; and an output, said output providing said partial sums to said third input, said output and third input being coupled to said at least one memory such that when processing a current block and considering line scanning, partial sums of the block preceding the current block are transmitted to said at least one memory and partial sums of the block following said current block are retrieved from said at least one memory.