VIDEO MONITOR METHOD AND VIDEO MONITOR DEVICE

PROBLEM TO BE SOLVED: To monitor a video image photographed by one camera at a plurality of positions without deteriorating the video image by the camera by selecting one among a plurality of controllers, connecting the selected controller to a sender of an ATM path whose receiving destination is a photographing device to control the photographing device. SOLUTION: The video monitor system uses an ATM communication device to distribute a video image photographed by a camera 11 installed in a monitor area to two monitors 12, 13 installed respectively in a sub center on a subordinate network and a center on a host network connected to the subordinate network via this sub center. An encoder 15 converts an analog video signal photographed by the camera contained in the subordinate network into a digital signal, which is assembled into an ATM cell by the ATM communication device A1. The camera 11 is connected to an input output port P1a of the ATM communication device A1 and an ATM switch B1 outputs a camera control signal.