Another method of the led display on the video signal processing is the multimedia method, commonly referred to as synchronous screen method. This way is use the normally multimedia card to capture television signals, then demodulation, filtering and tone color separation, etc. The image signal by the A / D converter, MPEG coding compression, so that the storage. When playback, then decompresses it, and directly viewed on a computer monitor. The signals that sent to the large led screen is through a special interface card from the computer DVI interface graphics or access, but also some processing on the adapter. At this time, the big led display screen is equivalent to the monitor of computer or one part on it, usually we call it windows, can achieve the one-to-one correspondence simultaneous display. Owing to the computer monitor is progressive scan, if the send a significant signal to the frame to pumping line processing, then, led display screen format is the format of the monitor.