TIME-MULTIPLEXED VIDEO TRANSMISSION-SYSTEM - A BANDWIDTH EFFICIENT TECHNIQUE FOR HIGH-QUALITY TELEVISION TRANSMISSION VIA SATELLITE

This paper describes a bandwidth efficient television transmission technique, the time-multiplexed video transmission (TMVT) system, developed at COMSAT Laboratories. The TMVT system is based on a two-dimensional filtering and interpolation technique to reduce the transmission bandwidth of TV signals, thereby increasing the utilizations efficiency of a satellite transponder by approximately 50%. This system adopts the time-multiplexed component transmission scheme with a single carrier to eliminate interference between different TV signals transmitted through the same satellite transponder and to avoid the intermodulation between the multiple FM carriers, as in the conventional frequency division multiplexing (FDM) approach. A prototype hardware of this system has been built and tested, with results closely matching the theoretical analysis.