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Method and apparatus for visual telecommunications, in particular for use by the deaf

  • US 4,546,383 A
  • Filed: 06/17/1983
  • Issued: 10/08/1985
  • Est. Priority Date: 06/18/1982
  • Status: Expired due to Fees
First Claim
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1. In an apparatus for generating signals in real time representative of visual information, in particular visual information relating to movements of the human body, the apparatus being of the type comprising:

  • a camera suitable for forming successive images and for converting each such image into a sequence of corresponding electrical signals;

    binary conversion means for converting the signal representative of each point in the sequence into binary form; and

    encoding means for encoding the resulting sequences of binary signals, the improvement which includes means for compressing said signals to a data rate compatible with transmission over an ordinary telephone line by virtue of said binary conversion means which link the camera to the encoding means, said means for compressing comprising means responsive to changes in brightness between neighboring points within each image to extract contours present in the original image, said binary signals then being representative of said extracted contours.

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