Implementation of Video Transmission Automatic Switching for Dual-VGA Model

A video automatic switcher for dual-VGA model is designed in this paper. It can select the current VGA signal as output according to the mouse position getting from the operating system. The output can switch automatically between the tow VGA signals whenever the mouse moves form one VGA to the other. This switcher can resolve these problems well,such as the discussing problem always is not synchronous with the displaying content which switched manually in a video conferencing system using multi-VGA model.