Facsimile and static presentation processing – Facsimile – Specific signal processing circuitry
Patent
1990-02-13
1991-11-19
Peng, John K.
Facsimile and static presentation processing
Facsimile
Specific signal processing circuitry
358 11, 358 12, 358142, 358 15, 358186, 358188, H04N 1704, H04N 1106, H04N 544, H04N 708
Patent
active
050670174
ABSTRACT:
A spectrum-efficient channel compatible technique of broadcasting and receiving television signals includes generating image signals corresponding to certain parts of an image frame to be transmitted, modulating first image signals corresponding to first contents of the image frame on a first radio frequency (RF) carrier wave signal corresponding to a television channel to produce first RF television signals, and modulating second image signals corresponding to second contents of the image frame on a second RF carrier wave signal corresponding to the television channel to produce second RF television signals. The first RF television signals are radiated from a first antenna having a first polarization, and the second RF television signals are radiated from a second antenna having a second polarization orthogonal to the first polarization. A first tuner/demodulator at a receiver detects the first RF television signals from the first RF carrier wave signal to obtain the first image signals, and a second tuner/demodulator detects the second RF television signals from the second RF carrier wave signal to obtain the second image signals. The tuner/demodulators include circuitry that enables them to discriminate between the two received RF carrier wave signals. The obtained first and second image signals are supplied to a display drive stage that drives an associated display to reproduce the transmitted image frame.
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Peng John K.
Zucker Leo
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