18-1 Study on the adaptive coding scheme applicable for the highly compressed HDTV

Abstract

This paper describes a very high compression MPEG-2 encoding scheme for distributing HDTV programs at a bit-rate around 11Mbps to be applied for digital terrestrial broadcasting service. As one of very effective encoding technologies required to maintain a satisfactory picture quality at such a low bit-rate, an optimum mode selection is proposed to be introduced into MPEG-2. From extensive evaluation results for various motion pictures, it is confirmed that the proposed optimum MPEG-2 encoding scheme gives a significant coding gain against conventional encoding scheme.