Video transmission and control system utilizing internal telephone lines
DCFirst Claim
1. A method for communicating via a set of frequency bands, comprising:
- obtaining a first electrical signal that encodes a first information stream, wherein;
the energy of said first electrical signal is concentrated within a plurality of frequency bands that comprises substantially non-overlapping frequency bands; and
said first information stream can be recovered from any subset of said plurality of frequency bands that is one less, in number, than said plurality of frequency bands, transmitting said first electrical signal onto a conductive path;
receiving energy within a first frequency band from, said conductive path, wherein;
a highest frequency of said first frequency band is lower than a lowest frequency of said plurality of frequency bands, a lowest frequency of said first frequency band is higher than a highest frequency used in a second frequency band, at least a portion of said first electrical signal is transmitted simultaneously with receiving said energy within said first frequency band; and
transmitting and receiving voiceband signals within said second frequency band onto said conductive path, wherein at least part of said transmitting and receiving of voiceband signals is conducted simultaneously with said transmitting of said first electrical signal.
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Abstract
A video transmission system for facilitating transmission of video and control signals, particularly infrared remote control signals, between different locations in a residence using existing telephone wiring. Simultaneous transmission of signals of both types over active telephone lines is possible without interference with telephone communications. Transmission succeeds without requiring special treatement of the video signals beyond RF conversion, despite signal attenuation inherent in transmission over the telephone line media. Two or more video sources may be tied into the system, and selected as desired. Remote control signals generated in one room may be utilized without requiring a clear line of sight between the remote control device and the receiver.
171 Citations
41 Claims
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1. A method for communicating via a set of frequency bands, comprising:
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obtaining a first electrical signal that encodes a first information stream, wherein;
the energy of said first electrical signal is concentrated within a plurality of frequency bands that comprises substantially non-overlapping frequency bands; and
said first information stream can be recovered from any subset of said plurality of frequency bands that is one less, in number, than said plurality of frequency bands, transmitting said first electrical signal onto a conductive path;
receiving energy within a first frequency band from, said conductive path, wherein;
a highest frequency of said first frequency band is lower than a lowest frequency of said plurality of frequency bands, a lowest frequency of said first frequency band is higher than a highest frequency used in a second frequency band, at least a portion of said first electrical signal is transmitted simultaneously with receiving said energy within said first frequency band; and
transmitting and receiving voiceband signals within said second frequency band onto said conductive path, wherein at least part of said transmitting and receiving of voiceband signals is conducted simultaneously with said transmitting of said first electrical signal. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20)
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21. A method for communicating via a set of frequency bands, comprising:
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obtaining a first electrical signal from a first information stream, wherein;
the energy of said first electrical signal is concentrated within a plurality of substantially non-overlapping frequency bands; and
said first information stream can be recreated from any subset of said first plurality of frequency bands that is one less, in number, than said first plurality of frequency bands, applying said first electrical signal on a conductive path;
receiving energy within a first frequency band on said conductive path, wherein;
a highest frequency of said first frequency band is lower than a lowest frequency of said plurality of frequency bands;
a lowest frequency of said frequency band is higher than a highest frequency used in a second frequency band, at least a portion of said first electrical signal is conducted simultaneously with said energy within said first frequency band; and
transmitting and receiving voiceband signals within said second frequency band on said conductive path, wherein at least part of said transmitting and receiving of voiceband signals is conducted simultaneously with said applying of said first electrical signal. - View Dependent Claims (22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40, 41)
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Specification