APPARATUS FOR ESTIMATING MOTION VECTOR AND METHOD FOR ESTIMATING MOTION VECTOR, PARTICULARLY REGARDING TO MINIMIZING CAPACITY OF LINE MEMORY REQUIRED FOR IMAGE DISPLAY DEVICE

摘要

PURPOSE: An apparatus for estimating a motion vector and a method for estimating a motion vector are provided to minimize capacity of a line memory required for an image display device obtaining a motion vector in real time, thereby reducing cost for the line memory. CONSTITUTION: An SAD(Sum of Absolute Difference) calculating unit(100) calculates an SAD value of each line forming a second frame between a reference block which is a predetermined area of a first frame and a plurality of comparing blocks forming the second frame. An SAD storing unit(110) temporarily stores the calculated SAD values by lines. A representative value calculating unit(120) selects the smallest SAD value among SAD values of the comparing blocks and blocks subordinate to the comparing blocks as representative values of the comparing blocks. A motion vector calculating unit(130) calculates a temporary motion vector to the block corresponding to the least representative value and the reference block, wherein the calculated temporary motion vector is renewed by a temporary motion vector corresponding to the least representative value applied by lines.