VIDEO SIGNAL ROUTING SYSTEM

摘要

PURPOSE: A video signal routing system such as a video multiplexing system with a plurality of cameras in a single loop line is provided to prevent the loss of video signals when a cable loop os interrupted. CONSTITUTION: A video signal routing system for video signals which includes a video signal carrying line arranged in a loop beginning and ending at a signal multiplexer, a plurality of video cameras electrically connected to the line at points spaced there along, and a video output line connected to receive video signals from the cameras through the multiplexer for display. The system includes a synchronization signal insertion device, a code signal insertion device, a duplicate synchronization signal insertion device, a duplicate code signal insertion device, a timing generator and interface for controlling both of the synchronization signal insertion devices and both of the code signal insertion devices and a micro controller for controlling the timing generator and interface.