Method and apparatus for adaptively performing motion compensation in a video processing apparatus

摘要

A method of adaptively performing motion compensation in a video processing apparatus is provided. The video processing apparatus processes macroblocks of compressed video information. Some of these macroblocks have motion vectors associated therewith. The method is conveniently implemented on a general purpose computer in one embodiment. In accordance with the disclosed method, the performance of the processor in the computer is monitored and a measurement of this performance is made. A threshold dependent on the measured processor performance is then set. For those macroblocks which have motion vectors associated therewith, the magnitude of the motion vector is determined. If the magnitude of the motion vector of a particular macroblock exceeds the threshold, then motion compensation is performed on that macroblock. However, if the magnitude of the motion vectors or motion vectors associated with a particular macroblock do not exceed the threshold, then no motion compensation is performed. The processor is thus relieved from the computational burden of performing motion compensation on a significant number of macroblocks.