Communication system

Details Communication system Communication system

1974-03-11

1977-06-21

Richardson, Robert L.

Facsimile and static presentation processing

Static presentation processing

Attribute control

358 84, 325 31, 325308, 340408, 343 65R, H04N 716

Patent

active

040315436

ABSTRACT:
The communication system, which is especially useful for pay TV, comprises a central station and a plurality of remote stations. The central station includes means for transmitting pay TV programs to the remote stations, and each remote station includes a circuit for transmitting information signals to the central station. Each of the remote stations is adapted to transmit its information signals randomly to the central station so that a relatively large number of remote stations can operate, without interference, with a single central station. In one arrangement, the central station directly reads the information in the received signals to determine the status of the remote station. In a second system, the central station receives randomly transmitted signals from each room, and it also receives signals from the program transmitter. The central station equipment includes a computer which detects time or phase coincidence between the signal from the program transmitter and that from the remote stations, and uses that information as desired.

REFERENCES:
patent: 2719188 (1955-09-01), Pierce
patent: 3058065 (1962-10-01), Freeman
patent: 3372233 (1968-03-01), Currey
patent: 3665311 (1972-05-01), Gargini
patent: 3716654 (1973-02-01), Hendrickson
patent: 3733430 (1973-05-01), Thompson et al.
patent: 3733930 (1973-05-01), Thompson
patent: 3786424 (1974-01-01), McVoy
patent: 3801735 (1974-04-01), Gabriel

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