Transmission Master Index Return to Technology Section Video Conferencing Video conferencing can be accomplished by satellite, broadcast, TV cable, or by compressed video. To transmit a conference by satellite, the originating site must have video production facilities and an uplink to a transponder . Transponders are typically leased only for the period required for the conference, plus a brief optional test period preceding the conference. A simple telephone circuit is all that's needed for the viewer to call in and ask questions or simply join the discussion. Once you pay for the uplink, you've got a huge potential audience.
Transponders are expensive.
Furthermore, uplink facilities are expensive. Receiving sites will need a satellite dish capable of receiving the signal from your transponder. You'll have to consider the capabilities of all of your receiving sites before making a decision about how to best uplink your signal. Most satellite-based conferences are broadcast quality . You'll need a facility capable of originating a clean, high-quality video and audio signal.