Patent ID: 6563872
Filing Date: 2003-05-13
Classification: H04N

Abstract:
A method of coding a moving picture comprising the steps of:dividing a picture into a plurality of blocks; selectively performing one of global motion compensation processing and local motion compensation processing on each of the blocks to obtain predictive errors for the block; orthogonally transforming the predictive errors to obtain orthogonal transform coefficients; and quantizing the orthogonal transform coefficients using a quantizing parameter; wherein the step of selectively performing one of global motion compensation processing and local motion compensation processing on each of the blocks to obtain predictive errors for the block includes the steps of calculating a global motion compensation evaluation value for the block based on (1) a sum of absolute values of predictive errors for the block obtained when global motion compensation processing is performed on the block and (2) a value determined by the quantizing parameter, calculating a local motion compensation evaluation value for the block based on (1) a sum of absolute values of predictive errors for the block obtained when local motion compensation processing is performed on the block and (2) a value determined by the quantizing parameter, comparing the global motion compensation evaluation value with the local motion compensation evaluation value, performing the global motion compensation processing on the block if the global motion compensation evaluation value is smaller the local motion compensation evaluation value, and performing the local motion compensation processing on the block if the local motion compensation evaluation value is smaller than the global motion compensation evaluation value.