METHOD AND DEVICE FOR CALCULATING PIXEL

摘要

PROBLEM TO BE SOLVED: To decrease the number of arithmetic operation cycles relating to detection of a motion vector by applying pixel calculation to plural pixels simultaneously for pixel calculation relating to detecting the motion vector for applying compression coding to a moving picture. SOLUTION: Difference absolute value computing elements 404, 405 calculate the difference absolute value for two pixels selected among two pixels read from a coded image memory 401, two pixels within a search area read from a forward reference image memory 402 or two pixels within a search area read from a backward reference image memory 403, an adder 406 adds arithmetic results from the two difference absolute value computing elements to a preceding arithmetic result stored in a register 407 and stores again the result of the sum in the register 407. A result of accumulating difference absolute values between pixels in a coded image and all pixels of an image in a search area in a reference image is used as the degree of correlation between the coded image and the image in the search area and a motion vector decision section 408 detects the value as a motion vector to decrease the number of arithmetic cycles.