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Conversational video phone

  • US 4,715,059 A
  • Filed: 11/07/1985
  • Issued: 12/22/1987
  • Est. Priority Date: 11/07/1985
  • Status: Expired due to Fees
First Claim
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1. A conversational freeze-frame video phone for transmitting a single frame of a video gray scale source image over an ordinary telephone line, comprising:

  • camera means for capturing said video source image;

    a memory coupled to said camera means for storing said single frame of said video source image;

    means for mapping said video source image onto a video source image field of from 2000 to 5,000 pixels;

    video source image display means for displaying said video source image field on a first display screen area having an area of approximately one square inch as a real time mirror image of said video source image;

    means, coupled to said telephone line, for asynchronously transmitting a modulated signal representing said source image field in a burst having an approximate duration of three seconds or less;

    means, coupled to said telephone line, for asynchronously receiving a modulated signal representing a remote video image field;

    means for demodulating said received signal;

    remote video image display means for displaying said remote image field on a second display screen area immediately adjacent said first display screen and having an area of approximately one square inch and adapted to display said remote video image field line by line as each line is received by said receiving means; and

    means, coupled to said telephone line, for transmitting and receiving an audio signal.

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