Patent ID: 6198771
Filing Date: 2001-03-06
Classification: G06T,H04N

Abstract:
A processing circuit for performing motion detection by dividing picture-based image signals into blocks, each block comprising a pre-set number of pixels and for searching an entire picture utilizing a block-matching method, wherein the block size of a reference block of the current picture comprises M.times.N pixels and the number of candidate blocks of a previous picture being M.times.N, said circuit comprising:a plurality of processing units equal to the product of M.times.N, each of said processing units being adapted for calculating an evaluation value based on a difference between a pixel value of said reference block and a pixel value of a one of said candidate blocks under consideration, and for summing said evaluation values, said processing units being arrayed and interconnected in an M.times.N matrix configuration, the pixel values of said reference block and the pixel values of the candidate block under consideration being input to said processing units in a pre-set sequence to thereby detect a motion vector;wherein each picture is a frame and wherein each processing unit comprises:a register for sequentially storing the pixel values of a current frame,a multiplexer for multiplexing pixel values of an odd column of a previous frame which is under consideration with the pixel values of an even column of the previous frame which is under consideration,a processor for calculating an absolute value of the difference between an output of said register and an output of said multiplexer, andan accumulator for accumulating outputs of said processor for summing the absolute values of the differences.