SECOND ORDER TEMPORAL PREDICTION FOR AN INTERFRAME CODER FOR NTSC SIGNALS.

Abstract

A motion-compensated interframe coding system offers high quality pictures while maintaining high coding efficiency even for moving scenes. However, for fade-changes (e. q. , as overlap-change, fade-in and fade-out) coding efficiency lowers considerably. Since human visual perception is as critical for moving pictures as for still pictures, degradation in picture quality is conspicuous. We provided second order temporal prediction in the motion-compensated interframe coder in order to improve picture quality during the fade-change period. Generally, higher order prediction increases prediction errors in comparison with first order prediction. A noise reduction filter was provided for the prediction signals to reduce the prediction errors. High quality pictures were obtained for all scenes including fade-changes using second order prediction.