Facsimile and static presentation processing – Facsimile – Specific signal processing circuitry
Patent
1988-07-06
1989-07-18
Britton, Howard W.
Facsimile and static presentation processing
Facsimile
Specific signal processing circuitry
358 85, 358903, 370 76, 379 97, 379 98, 379100, H04N 718
Patent
active
048498114
ABSTRACT:
Method for simultaneously sending audio and video signals over standard telephone lines or other channels having a restricted bandwidth which comprises obtaining a video image, digitizing the image, modulating a signal with the digitized image, obtaining audio signals and filtering the audio signals to a frequency range of the band outside that of the modulated video signal, combining the filtered audio signals and the video signal, and transmitting such signals through the restricted bandwidth channel, together with a method for receiving such signals and apparatus for sending and receiving such signals.
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