Telecommunications – Receiver or analog modulated signal frequency converter – Signal selection based on frequency
Patent
1983-05-25
1985-03-19
Griffin, Robert L.
Telecommunications
Receiver or analog modulated signal frequency converter
Signal selection based on frequency
455 3, 455 6, 455 53, 358 86, 370 3, H04N 716
Patent
active
045063877
ABSTRACT:
A programming-on-demand cable system is provided which allows any one of a plurality of individual users to request anyone of a plurality of video programs they wish to view from a library of programs, and permits the requested program to be available for viewing on a conventional television set at the user's location following a request initiated by the user. Each program is preprogrammed in a memory device selectable by a host computer at a central data station in response to an address signal transmitted from the user. The host computer in conjunction with other electronics transmits the video program at a high non-real-time rate over a fiber optic line network to a data receiving station at the user's location. The data receiving station then converts the received optical data back to electrical data and stores it for subsequent real-time transmission to the user's television set. The system permits the user to view any one of a number of programs transmitted on a non-real-time basis, and also allows the user to store the transmitted program at his data receiving station for an indefinite period of time for viewing at a later date. A method is also provided for transmitting the programs on a non-real-time basis.
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patent: 3931512 (1976-01-01), Kent et al.
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16 Shows & What Do You Get from Video Magazine, Jul. 1983.
Dr. M. Kawahata, "The HI-OVIS Optical Communication System", _(17-20 Sep. 1979).
Greer Timothy K.
Griffin Robert L.
Jeffers Albert L.
Niewyk Anthony
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