Double duplex fiberoptic-based teleconferencing system for radiology

The teleconferencing system between two hospital sites is capable of simultaneously transmitting on four video channels (two in each direction) and on two audio channels. The two video signals in each conference room may be selected from a choice of an x-ray viewbox, a room camera, and two slide projectors, hence permitting dual-slide-projection teleconferencing. The signals are transmitted with four optical fibers over a distance of 3 miles. Two video enhancers on each site provide edge and contrast enhancement. An electronic video pointer can be superimposed on each image. The audio component is based on an automatic microphone system with background noise suppression