Computer controlled presentation system

摘要

A computer based presentation system allows a presenter to view on a monitor associated with a computer an image prior to its display on a television monitor or projection system to an audience. The system includes a video frame buffer having an input coupled to a video port of the computer for receiving a video signal generated by the computer. The buffer captures and stores in memory a frame carried by the video signal. An output of the video buffer is connected to a video display adapter for continuously converting the stored image frame to a second video signal for transmission to a television monitor for display to an audience. A command to update the video frame buffer is generated by a hand-held remote and transmitted to a serial port of the computer through a photoelectric sensor housed with the video buffer and video display adapter. The computer signals the video buffer through the serial port to update the contents of its memory with the next image frame carried by the video signal.