Telecommunications – Receiver or analog modulated signal frequency converter – Signal selection based on frequency
Patent
1987-03-17
1989-12-05
Griffin, Robert L.
Telecommunications
Receiver or analog modulated signal frequency converter
Signal selection based on frequency
455600, 455 4, 34082572, H04B 900
Patent
active
048858030
ABSTRACT:
A system and method for controlling and distributing the entertainment signals from a plurality of electronic entertainment devices to a plurality of remote locations within a building; A host controller combines the respective entertainment signals from a plurality of sources, such as a satellite receiver unit, a video cassette recorder and a rooftop antenna, to provide a mixed output signal at a relatively constant impedance. The mixed output signal is transmitted along a single coaxial cable to a plurality of remote locations distributed along the cable. Each remote location includes an infrared detector for receiving infrared control signals from a remote control transmitter for controlling the corresponding entertainment device. The infrared detector converts the infrared control signals into corresponding electrical control signals and transmits the electrical control signals back to the host controller on a second conductor which is also included within the coaxial cable. The host controller reconverts the electrical control signals to infrared signals for operating the respective entertainment devices. The infrared detectors at each remote location are prowered directly from the host controller, thereby eliminating the need for wall transformers and the like.
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patent: 4656655 (1987-04-01), Hashimoto
Gfeller et al; "Wireless In-House Data Communications via Diffuse Infrared Radiation;"Proceedings of the I.E.E.E.; vol. 67; No. 11; Nov. 1979; pp. 1474-1486.
Hermann Lawrence W.
Offield Donald G.
Griffin Robert L.
Hermann Lawrence W.
McCord W. Kirk
Telese, Jr Andrew J.
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