Patent ID: 6690730
Filing Date: 2004-02-10
Classification: G06T

Abstract:
A motion estimator for performing motion estimation to compress an image data frame, the motion estimator comprising:a first memory comprising a previous search area memory having a plurality of memory areas for storing previous search area data by lines and a current process area memory for storing current process area data by lines; a previous search area data provider for shifting and outputting the previous search area data output from the plurality of memory areas in circles; a first switching part for selecting the previous search area data output from the previous search area data provider; a second switching part for selecting the current process area data output from the current process area memory by rows; a calculator comprising a plurality of sum of absolute differences (SAD) calculators connected in parallel, the plurality of SAD calculators calculating SADs of the selected previous process area data and the current process area data; and a shift register for receiving and shifting SAD data output from a series of SAD calculators of the calculator and adding the shifted data and SAD data output from another series of SAD calculators, thereby outputting a partial SAD.