A video signal controlling system and method

The present invention relates to a video control system, a display system control device and a video controlling method thereof. The video control system comprises a display system control device for processing all signals in the system and a display device assembly, which is composed of at least one and above intelligent display devices having independent addresses each, which are from 1A to MxN. The display system control device comprises a video bridge (5), which further comprises at least a video bridge unit (51,52), a video switch (6), an embedded micro-processing module (7) and a storage device (9). The video controlling method comprises the steps of transmitting video inputs to respective video bridge units, which convert the video inputs to the video format of a video switch and outputting the converted video signals to the video switch. The video switch is then enabled to receive the video signals and output the video output stream to the display device assembly. The video bridge and the video switch