Facsimile and static presentation processing – Facsimile – Specific signal processing circuitry
Patent
1983-05-09
1984-01-03
Buczinski, Stephen C.
Facsimile and static presentation processing
Facsimile
Specific signal processing circuitry
358118, 358121, 358124, H04N 716
Patent
active
044245327
ABSTRACT:
A coding and decoding system for video and audio signals includes means at the transmitter for deriving clock and internal timing signals from the video signal. The internal timing signals are utilized at the transmitter to provide digital audio data representative of the program audio signal. The digital audio data is derived by sampling the program audio signal during horizontal lines of the video signal. The synchronizing information in the horizontal and vertical blanking intervals of the video signal is suppressed and the digital audio data and data representative of a decoder clock signal are inserted in the horizontal blanking intervals. Vertical reference signal data is inserted into the vertical blanking intervals of the video signal as it is transmitted. At the decoder there are means for reconstituting the audio signal from the digital audio data. There is an independent sync pulse generator at the decoder which is controlled by the clock data and the vertical reference signal data and which provides the appropriate synchronizing information for the video signal. The video signal, without sync information, is combined with the separately generated sync pulses from the sync pulse generator and with the reconstituted audio to provide a television program signal usable at a conventional receiver.
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de Jong Cornelis A.
de Koningh Tom
den Toonder Pieter
Fondse Pieter J.
Seltenrijch Johannes
Buczinski Stephen C.
Oak Industries Inc.
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