Matrix host machine adopts large-scale sound, video switching special chip as the sound, video switching matrix circuit of multiple multi-channel switch equipment, welding advanced matrix switching technology and computer technology, can give users provide excellent overall performance. The main machine USES modular board structure, has the video output, video input, audio output, audio input and so on the many kinds of modular board, the user can choose various board combination into needed by the system capacity and the function of switching equipment. Matrix host has complete matrix switch ability, can be in any the monitors display any camera images and monitoring and the corresponding voice, and this control can through the manual operation and automatic switching mode to realize, the user can use a function complete, according to the man-machine ?