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.
Type:
Grant
Filed:
November 7, 1985
Date of Patent:
December 22, 1987
Assignee:
Luma Telecom, Inc.
Inventors:
Michael A. Cooper-Hart, Lawrence D. Emmons, James S. Mackley, David H. Stokes