Input "video" from 4 sources to show all 4 at once on one television screen (4 "boxes")?

Question

Here's the deal...my marketing company is hosting a large scale HALO3 tournament in Halifax and we want to have a "viewing" area where the competitors are able to watch the action. We want to show all four competitors action on ONE screen. The only way I can think of doing this is run VIDEO OUT component cable from all four televisions....but how will the Television play all four at once if the televison only has one VIDEO INPUT? (The television being used for the viewing area is a 42" LCD HD toshiba. Will I need some type of adapter? A computer program to allow all 4 video inputs, then reroute the video from the computer to the "viewing tv"? I am out of options.. thanks guys for any help

Answer 1

You need a video mixer with at least 4 inputs and one output.
So all the video pre-processing is done on the mixer.
Most video mixers should have the option to show all 4 input in one screen.

You should be able to rent one from a video company.