Motion vector detection device and method in segmental motion compensation

摘要

The apparatus and method for detecting a motion vector are to detect a motion vector in consideration of the brightness of an image signal applied during motion compensation for each segment. To this end, the apparatus includes a segment processor; A first mean value component remover for removing an average value (DC) component from an image signal output from the segment processor; A frame memory for storing a previous frame video signal; Shift means for outputting the N video signals shifted up, down, left and right and the shifted amounts of the video signals output from the frame memory; A second average value remover for removing an average value component for each of the N video signals output from the shifting means; An average square error calculator for calculating a mean square error value (MSE) between the image signal output from the first average value remover and the N image signals output from the second average value remover; A minimum value detector for detecting a minimum value among the N mean square error values; And a motion vector selector which selects the shift amount of the video signal corresponding to the detected minimum value among the N video signals output from the shift means as the segment motion vector currently transmitted.