A computer hardware system for editing a video signal includes, a first signal
bus employing a first bus interface, and a second signal bus employing a second
bus interface and adapted to carry at least one video signal. The system desirably
further includes a general purpose computer connected to the first bus and operating
according to a first operating system; and a video graphics computer connected
to the first signal bus and the second signal bus. The video graphics computer
operates according to a second operating system. The video graphics computer is
adapted for editing the video signal transmitted along the second signal bus according
to commands from the general purpose computer.