The project is mainly to the community more than 80 video 1-1 shows on TV wall. Total control center using two network digital matrix, set 2 * 2 DID splicing screen, the display unit for more output image segmentation can be carried out at the same time four screen the whole screen splicing output. The left two pieces of DID screen, each do 16 split-screen display screen. The front all equipment by the public security line transmission to the center room.