Video transmission and control system utilizing internal telephone lines
First Claim
1. A system for communicating information comprising:
- a sub-system, a transceiver, a signal interface, and an information source, a path coupled to the sub-system and the transceiver, wherein the path is a two-wire conductive path; and
a first branch coupled to the signal interface and a first point on the path, wherein the first branch is a two-wire conductive branch;
wherein, the sub-system transmits a first voiceband signal onto the path, receives a second voiceband signal from the path, and is operable to process telephone signals;
the signal interface receives a first information set from the information source and transmits onto the first branch a first signal that encodes the first information set;
the transceiver receives a second information set and transmits onto the path a second signal that encodes the second information set;
the transceiver receives the first signal from the path, and substantially recovers the first information set from the first signal; and
the signal interface receives the second signal from the first branch and substantially recovers the second information set from the second signal; and
and wherein the power spectrum of the first signal is substantially confined within a first frequency band;
the power spectrum of the second signal is substantially confined within a second frequency band;
a highest frequency of the second frequency band is below a highest frequency of the first frequency band; and
a lowest frequency of the second frequency band is above voiceband and below a lowest frequency of the first frequency band.
1 Assignment
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Accused Products
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 treatment 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.
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Citations
60 Claims
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1. A system for communicating information comprising:
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a sub-system, a transceiver, a signal interface, and an information source, a path coupled to the sub-system and the transceiver, wherein the path is a two-wire conductive path; and
a first branch coupled to the signal interface and a first point on the path, wherein the first branch is a two-wire conductive branch;
wherein, the sub-system transmits a first voiceband signal onto the path, receives a second voiceband signal from the path, and is operable to process telephone signals;
the signal interface receives a first information set from the information source and transmits onto the first branch a first signal that encodes the first information set;
the transceiver receives a second information set and transmits onto the path a second signal that encodes the second information set;
the transceiver receives the first signal from the path, and substantially recovers the first information set from the first signal; and
the signal interface receives the second signal from the first branch and substantially recovers the second information set from the second signal; and
and wherein the power spectrum of the first signal is substantially confined within a first frequency band;
the power spectrum of the second signal is substantially confined within a second frequency band;
a highest frequency of the second frequency band is below a highest frequency of the first frequency band; and
a lowest frequency of the second frequency band is above voiceband and below a lowest frequency of the first frequency band. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33)
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34. A method for communicating information comprising:
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transmitting a first voiceband signal onto a path and receiving a second voiceband signal from the path, wherein the path is a two-wire conductive path;
transmitting onto the path a first signal while presenting a high impedance to voiceband signals on the path, the first signal encoding a first information set;
transmitting onto the path a second signal while presenting a high impedance to voiceband signals on the path, the second signal encoding a second information set;
receiving the first signal from the path and substantially recovering the first information set from the first signal; and
receiving the second signal from the path, and substantially recovering the second information set from the second signal; and
wherein the power spectrum of the first signal is substantially confined within a first frequency band, and the power spectrum of the second signal is substantially confined within a second frequency band;
a highest frequency of the second frequency band is below a highest frequency of the first frequency band; and
a lowest frequency of the second frequency band is above voiceband and below a lowest frequency of the first frequency band; and
wherein the first signal, and the second signal are electrical signals. - View Dependent Claims (35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47, 48, 49, 50, 51, 52, 53, 54, 55, 56, 57, 58, 59, 60)
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Specification