Motion estimation system for a video coder

摘要

A motion estimation system for a video coder comprises an input for a video image 6 to be coded, and a series of motion estimators 2,3 of varying complexity, for estimating a motion vector field between the received image 6 and a reference image 5. The subsequent motion estimator in the series is selected by a control means 4 if a prediction error associated with the motion vector field estimated by the currently selected motion estimator exceeds a predetermined threshold.