All Products for US Patent 4797750 - Method and apparatus for transmitting/recording computer-generated displays on an information channel having only audio bandwidth

Inventor(s): Karweit; Michael J. (Baltimore, MD)

Owner: John Hopkins University (Baltimore, MD)

Filing Date: April 16, 1986

Issue Date: January 10, 1989

Abstract: A method and apparatus for transmitting/recording a computer-generated display simultaneously with the transmission of audio and/or video signals. A computer generates a series of codes from which an image may be derived, the resolution of which is not dependent on the recording/transmission medium. These codes are supplied to a first modem through a standard RS 232 communications line. The first modem converts these codes into image-bearing audio tones. The audio tones are input in the left audio channel of a video tape recorder. Simultaneously, aural information is picked up by a microphone and input into the right audio channel of the video tape recorder. Also simultaneously, a video camera provides video signals to the video channel of the video tape recorder. After recording these signals on a video tape, the tape is transported to a second video tape recorder where it is played back. On playback, the audio tone signals from the left audio channel of the video tape recorder are provided to a second modem. The second modem reconverts the audio tone signals into computer codes which are provided to a computer monitor which generates and then displays the image generated by the computer with a resolution dependent only upon the monitor. Also on playback, the audio signals from the right audio channel of the video tape recorder are provided to a speaker. Also on playback the video signals recorded on the video channel of the video tape are played back and provided to a standard television for display.