In order to realize practical HDTV transmission via satellite, NTV has introduced HDTV digital Codec. Using this equipment, the HDTV signals are compressed into 60 Mbps bit stream, modulated using QPSK, and transmitted via communication satellite with 36 MHZ band-width. We have started experimental digital transmission and measured the characteristics of transmission path at a field test. In this paper, we introduce an outline of our HDTV digital transmission system. Also we describe the result of the measurement test.
