Development of 135 Mbit/s HDTV codec

摘要

The source bit-rate of HDTV is extremely high compared with that of conventional standard TV, and a bit-rate reduction will become an important matter in the digital transmission of HDTV signals using a communication satellite or the Broadband-ISDN. The authors are developing an HDTV codec based on DCT plus motion-compensated prediction at a bit-rate of 135 Mbit/s and an original sampling frequency of the studio standard. This paper outlines the technical description of this HDTV prototype codec presently being built.