System for transmitting facsimile data in the upper vestigial chrominance sideband of a video signal
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United States of America Patent
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Sep 9, 1997
Issued Date -
N/A
app pub date -
Apr 8, 1994
filing date -
Jun 14, 1991
priority date (Note) -
Expired
status (Latency Note)
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Abstract
The instant application is directed to a cable facsimile machine which implements the upper vestigial chrominance sideband of a standard video signal for data transmission. Signal processors for permitting the transparent, simultaneous transmission and reception of a data signal in the video bandwidth is disclosed. The signal processor in the transmitter rasterizes the data at the horizontal scanning rate and modulates the data with a data carrier at a non-integral multiple of the horizontal scanning rate to obtain frequency interleaving. The data is transmitted during the active video portion of each video line.
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