Telegraphy – Systems – Printing
Patent
1975-04-25
1976-10-19
Griffin, Robert L.
Telegraphy
Systems
Printing
325 31, 178DIG13, H04B 100
Patent
active
039873978
ABSTRACT:
A two-way cable communications system includes a master station having a transmitter for transmitting television program and interrogation signals to a plurality of remote units or transceivers through a cable network and a receiver for receiving reply signals from individual ones of the remote units. Each remote unit includes a receiver for receiving the program and interrogation information from the master station, a transmitter for transmitting reply signals back to the master station and television converter and receiver means for reproducing the television programs. A remote control means coupled to the remote unit through a mmulticonductor cable includes a channel selector and encoder means for encoding the channel selector information and a switch means to enable the channel selector to be utilized to provide viewer response information. The output of the encoder means is clocked into a storage register having its output coupled to a converter which operates a television tuner when the switch means is in a first condition. The output of the storage register is also coupled to a data readout circuit which is enabled by an interrogation signal to apply the data to the remote transmitter. The encoder output is also applied to a gating circuit which is enabled when the switch means is in a second condition to couple the output to the data readout circuit. Thus both program rating and viewer response information may be obtained from the remote channel selector control.
REFERENCES:
patent: 3757225 (1973-09-01), Ulicki
patent: 3768019 (1973-10-01), Podowski
patent: 3794922 (1974-02-01), Osborn et al.
patent: 3803491 (1974-04-01), Osborn
patent: 3886302 (1975-05-01), Kosco
I.E.E.E. Spectrum Applications Report on "Two-Way Applications for Cable Television Systems in the '70s", by Jurgen, pp. 39-54, 11/1971.
Belcher Brian E.
Campbell John G.
Clegg, Jr. Giles C.
Griffin Robert L.
Ng Jin F.
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