Conversational video phone
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United States of America Patent
Stats
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Dec 22, 1987
Grant Date -
N/A
app pub date -
Nov 7, 1985
filing date -
Nov 7, 1985
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
The present invention is a conversational freeze-frame video phone which transmits a source image over a standard telephone line in conjunction with audio voice signals. A camera is used to capture an image to be transmitted and the image is mapped onto an image field of 2,000 to 5,000 pixels. The image field is displayed on a display area of approximately one square inch on a display screen. Digitized data representing the pixels is asynchronously transmitted on a modulated signal in a single burst of less than three seconds duration. Corresponding remote images are asynchronously received, demodulated, and displayed. The transmission of the audio signal is interrupted upon the detection of a video image being transmitted.
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