MOTION VECTOR DETECTOR AND ITS METHOD

摘要

PROBLEM TO BE SOLVED: To save power consumption and to detect a motion vector even with a small data flow by stopping accumulating operations with respect to motion vector objects immediately when an accumulated value of absolute values of differences of signals of picture elements of a current image and a reference image exceeds a prescribed value to make a cycle number of the accumulation variable. SOLUTION: A control means 5 provides the output of a stop control signal S3 that stops the arithmetic operation of an accumulation circuit when the output of any difference absolute value accumulation circuit being a component of an accumulation means 1 is invalid. An accumulation stop means 10 provides the output of a stop signal S4 that is used to stop any circuit whose output is invalid among 1st to n-th difference absolute value accumulation circuits 2a-2n based on the stop control signal S3. Then the accumulation stop means 10 is provided with a plurality of individual stop circuits 11 that stop accumulation processing to the 1st to n-th difference absolute value accumulation circuits 2a-2n.