BBC R&D

Abstract

This Report compares some DPCM prediction strategies for bit-rate reduction of YUV component-coded digital television signals for broadcast-quality contribution or distribution applications. Several systems are compared for two critical moving picture sequences as a test of worst-case performance. The effects of transmission errors on the decoded picture are also compared for some of the systems. The results show that, in terms of picture quality, many of the systems give similar performance on critical sequences but that the error performance of multi-element predictors is much better than that of some of the adaptive prediction strategies. The best performance is obtained from a least-mean-square (LMS) adaptive predictor.