Facsimile and static presentation processing – Facsimile – Specific signal processing circuitry
Patent
1977-04-11
1978-12-19
Buczinski, S. C.
Facsimile and static presentation processing
Facsimile
Specific signal processing circuitry
358 84, 358115, 358123, H04N 716, H04N 700
Patent
active
041308336
ABSTRACT:
The standard composite television signal is modulated onto an intermediate frequency carrier signal. The so-modulated signal is applied to the input of a first and second frequency converter for conversion respectively to a first or second UHF or VHF output frequency. The two converters are enabled alternately, each for a predetermined number of frames. The resultant signals are summed and transmitted to a receiver location. At the receiver location, the power is split along two channels. Two tuner-mixers, one in each channel, and tuned, respectively, to the first and second output frequency, respectively convert the incoming signal components having the first and second frequency to the same intermediate frequency. The two intermediate frequency signals are summed and converted to the proper frequency for reception on standard television receiver. A program code detector at the receiver counts the number of consecutive outputs from at least one of the tuner-mixers and enables the billing system if the correct number of counts for a given program is present or disables the tuner-mixers if the number is incorrect.
REFERENCES:
patent: 3054857 (1962-09-01), Weiss
patent: 3789131 (1974-01-01), Harney
patent: 3826863 (1974-07-01), Johnson
patent: 3885089 (1975-05-01), Callais et al.
Buczinski S. C.
Rich Marianne
Teleglobe Pay-TV System, Inc.
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