PDM: A versatile digital transmission system for video
G. D. Burgess · International Journal of Digital & Analog Communication Systems · 1992
Abstract This report discusses a pulse density modulation (PDM) video transmission system. PDM is a one‐bit digital coding scheme with advantages of transparency due to an inherently extended signal bandwidth and relatively simple decoding; these make it ideal for a variety of applications. The system outlined is designed to carry a single analogue video channel, together with several sound channels, over a 140 or 280 Mbit/s digital transmission‐link. An alternative option to the sound channels will be to carry a 2.048 Mbit/s data channel. Since the analogue video input will be PDM coded, this will enable the system to carry video formats which have a flat base‐band frequency response requirement of in excess of 20 MHz (such as HDTV), allowing a large degree of flexibility in use.