Video transmission and control system utilizing internal telephone lines
DCFirst Claim
1. In a telephone system in which a two-wire telephone network carries telephone voice signals in a telephone voice band between a first telephone equipment and a second telephone equipment coupled to the telephone network, a method for bi-directional communication in a high frequency band of frequencies above the telephone voice band of information between a first transceiver and a second transceiver coupled to the two-wire telephone network comprising:
- accepting a first signal at the first transceiver;
transmitting a first transmitted signal that encodes control information in the first signal from the first transceiver to the second transceiver over the two-wire telephone network in a first range of frequencies in the high frequency band;
receiving the first transmitted signal at the second transceiver;
providing the control information to a source of information;
accepting at the second transceiver a second signal from the source of information;
transmitting a second transmitted signal that encodes information in the second signal from the second transceiver to the first transceiver over the two-wire telephone network in a second range of frequencies in the high frequency band;
preventing transmission of signals in the high frequency band from the two-wire telephone network to telephone equipment coupled to the two-wire telephone network, including preventing transmission of the second transmitted signal to the second telephone equipment;
receiving the second transmitted signal at the first transceiver; and
providing information in the second signal from the first transceiver to a destination of information;
wherein the first range of frequencies is smaller than the second range of frequencies.
6 Assignments
Litigations
0 Petitions
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 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.
78 Citations
63 Claims
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1. In a telephone system in which a two-wire telephone network carries telephone voice signals in a telephone voice band between a first telephone equipment and a second telephone equipment coupled to the telephone network, a method for bi-directional communication in a high frequency band of frequencies above the telephone voice band of information between a first transceiver and a second transceiver coupled to the two-wire telephone network comprising:
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accepting a first signal at the first transceiver;
transmitting a first transmitted signal that encodes control information in the first signal from the first transceiver to the second transceiver over the two-wire telephone network in a first range of frequencies in the high frequency band;
receiving the first transmitted signal at the second transceiver;
providing the control information to a source of information;
accepting at the second transceiver a second signal from the source of information;
transmitting a second transmitted signal that encodes information in the second signal from the second transceiver to the first transceiver over the two-wire telephone network in a second range of frequencies in the high frequency band;
preventing transmission of signals in the high frequency band from the two-wire telephone network to telephone equipment coupled to the two-wire telephone network, including preventing transmission of the second transmitted signal to the second telephone equipment;
receiving the second transmitted signal at the first transceiver; and
providing information in the second signal from the first transceiver to a destination of information;
wherein the first range of frequencies is smaller than the second range of frequencies. - View Dependent Claims (2, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19)
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3. In a telephone system in which a two-wire telephone network carries telephone voice signals in a telephone voice band between a first telephone equipment and a second telephone equipment coupled to the telephone network, a method for bi-directional communication in a high frequency band of frequencies above the telephone voice band of information between a first transceiver and a second transceiver coupled to the two-wire telephone network comprising:
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accepting a first signal at the first transceiver;
transmitting a first transmitted signal that encodes control information in the first signal from the first transceiver to the second transceiver over the two-wire telephone network in a first range of frequencies in the high frequency band;
receiving the first transmitted signal at the second transceiver;
providing the control information to a source of information;
accepting at the second transceiver a second signal from the source of information;
transmitting a second transmitted signal that encodes information in the second signal from the second transceiver to the first transceiver over the two-wire telephone network in a second range of frequencies in the high frequency band;
preventing transmission of signals in the high frequency band from the two-wire telephone network to telephone equipment coupled to the two-wire telephone network, including preventing transmission of the second transmitted signal to the second telephone equipment;
receiving the second transmitted signal at the first transceiver;
providing information in the second signal from the first transceiver to a destination of information; and
preventing transmission of signals in the high frequency band from a conductive path joining the first transceiver and the second transceiver on the two-wire telephone network to one or more telephone devices coupled to said conductive path at locations other than the locations of the first transceiver and the second transceiver. - View Dependent Claims (4, 5)
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6. In a telephone system in which a two-wire telephone network carries telephone voice signals in a telephone voice band between a first telephone equipment and a second telephone equipment coupled to the telephone network, a method for bi-directional communication in a high frequency band of frequencies above the telephone voice band of information between a first transceiver and a second transceiver coupled to the two-wire telephone network comprising:
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accepting a first signal at the first transceiver;
transmitting a first transmitted signal that encodes control information in the first signal from the first transceiver to the second transceiver over the two-wire telephone network in the high frequency band;
receiving the first transmitted signal at the second transceiver;
providing the control information to a source of information;
accepting at the second transceiver a second signal from the source of information;
transmitting a second transmitted signal that encodes information in the second signal from the second transceiver to the first transceiver over the two-wire telephone network in the high frequency band;
preventing transmission of signals in the high frequency band from the two-wire telephone network to telephone equipment coupled to the two-wire telephone network, including preventing transmission of the second transmitted signal to the second telephone equipment;
receiving the second transmitted signal at the first transceiver; and
providing information in the second signal from the first transceiver to a destination of information;
wherein the two-wire telephone network includes a segment that forms a branch on a conductive path joining the first transceiver and the second transceiver and wherein transmitting the second transmitted signal onto the two-wire telephone network includes processing the second signal to form the second transmitted signal to mitigate effects resulting from the branch on the conductive path. - View Dependent Claims (7)
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20. A system for bi-directional communication of information in a high band of frequencies above a telephone voice band of frequencies over a two-wire telephone network used to carry telephone voice signals in the telephone voice band between a first telephone equipment and a second telephone equipment coupled to the two-wire telephone network comprising:
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a first transceiver coupled to the two-wire telephone network including circuitry for accepting a first signal, and circuitry for transmitting onto the two-wire telephone network in a first range of frequencies in the high frequency band a first transmitted signal that encodes control information in the first signal;
a second transceiver coupled to the two-wire telephone network including circuitry for receiving the first transmitted signal from the two-wire telephone network, circuitry for recovering the control information from the received first transmitted signal, circuitry for providing the control information to a source for information, circuitry for accepting a second signal from the source of information, and circuitry for transmitting onto the two-wire telephone network in a second range of frequencies in the high frequency band a second transmitted signal that encodes information in the second signal;
circuitry coupled between the second telephone equipment and the two-wire telephone network for preventing transmission of signals in the high frequency band from the two-wire telephone network to telephone equipment coupled to the two-wire telephone network;
wherein the first transceiver further includes circuitry for receiving the second transmitted signal from the two-wire telephone network, circuitry for recovering information in the second signal from the second transmitted signal, and circuitry for providing the recovered information to a destination of information; and
wherein the first range of frequencies is smaller second range of frequencies. - View Dependent Claims (21, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37)
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22. A system for bi-directional communication of information in a high band of frequencies above a telephone voice band of frequencies over a two-wire telephone network used to carry telephone voice signals in the telephone voice band between a first telephone equipment and a second telephone equipment coupled to the two-wire telephone network comprising:
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a first transceiver coupled to the two-wire telephone network including circuitry for accepting a first signal, and circuitry for transmitting onto the two-wire telephone network in the high frequency band a first transmitted signal that encodes control information in the first signal;
a second transceiver coupled to the two-wire telephone network including circuitry for receiving the first transmitted signal from the two-wire telephone network, circuitry for recovering the control information from the received first transmitted signal, circuitry for providing the control information to a source for information, circuitry for accepting a second signal from the source of information, and circuitry for transmitting onto the two-wire telephone network in the high band of frequencies a second transmitted signal that encodes information in the second signal; and
circuitry coupled between the second telephone equipment and the two-wire telephone network for preventing transmission of signals in the high frequency band from the two-wire telephone network to telephone equipment coupled to the two-wire telephone network;
wherein the first transceiver further includes circuitry for receiving the second transmitted signal from the two-wire telephone network, circuitry for recovering information in the second signal from the second transmitted signal, and circuitry for providing the recovered information to a destination of information; and
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wherein the system further comprises circuitry for coupling one or more telephone devices to a conductive path joining the first transceiver and the second transceiver on the two-wire telephone network at locations other than locations of the first transceiver or the second transceiver and for presenting high impedance in the high band of frequencies to said telephone network. - View Dependent Claims (23, 24, 38, 39, 40, 41)
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25. A system for bi-directional communication of information in a high band of frequencies above a telephone voice band of frequencies over a two-wire telephone network used to carry telephone voice signals in the telephone voice band between a first telephone equipment and a second telephone equipment coupled to the two-wire telephone network comprising:
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a first transceiver coupled to the two-wire telephone network including circuitry for accepting a first signal, and circuitry for transmitting onto the two-wire telephone network in the high frequency band a first transmitted signal that encodes control information in the first signal;
a second transceiver coupled to the two-wire telephone network including circuitry for receiving the first transmitted signal from the two-wire telephone network, circuitry for recovering the control information from the received first transmitted signal, circuitry for providing the control information to a source for information, circuitry for accepting a second signal from the source of information, and circuitry for transmitting onto the two-wire telephone network in the high band of frequencies a second transmitted signal that encodes information in the second signal; and
circuitry coupled between the second telephone equipment and the two-wire telephone network for preventing transmission of signals in the high frequency band from the two-wire telephone network to telephone equipment coupled to the two-wire telephone network;
wherein the first transceiver further includes circuitry for receiving the second transmitted signal from the two-wire telephone network, circuitry for recovering information in the second signal from the second transmitted signal, and circuitry for providing the recovered information to a destination of information; and
wherein the two-wire telephone network includes a segment that forms a branch on a conductive path joining the first transceiver and the second transceiver and wherein the second transceiver further includes circuitry for processing the second signal to form the second transmitted signal to mitigate effects resulting from the branch on the conductive path. - View Dependent Claims (42, 43, 44, 45, 46)
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47. A system for communication in a high band of frequencies above a telephone voice band of frequencies over a two-wire telephone network forming two conductive paths between devices coupled to said network and used to carry telephone voice signals in the telephone voice band, said system comprising:
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a plurality of devices for communicating in the high band of frequencies coupled at separated points on a conductive path of the two-wire telephone network, including a first device, a second device, and a third device;
wherein the first device includes circuitry for receiving information transmitted over the two-wire telephone network in the high band of frequencies and each of the second device and third device includes circuitry for selectively transmitting information onto the two-wire telephone network in a shared range of frequencies in the high band of frequencies without interfering with voice signals carried in the telephone voice band whereby either of the second and third devices can pass information to the first device over the two-wire network to the first device. - View Dependent Claims (48, 49, 50, 51, 52, 53)
circuitry for accepting an information-bearing signal; and
circuitry for processing said information-bearing signal for transmission to the first device, wherein said circuitry is configured to reduce signal degradation caused by the branching of the network.
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51. The system of claim 50 wherein the circuitry for processing said signal includes circuitry for frequency-shifting the information-bearing signal.
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52. The system of claim 50 wherein the circuitry for processing said signal includes circuitry for spectral pre-emphasis of said signal.
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53. The system of claim 50 wherein the circuitry for transmitting information in the high band of frequencies includes circuitry for balancing the signal transmitted onto the two-wire telephone network.
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54. A method for communication in a high band of frequencies above a telephone voice band of frequencies over a two-wire telephone network forming two conductive paths between devices coupled to said network and used to carry telephone voice signals in the telephone voice band, said method comprising:
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coupling a plurality of devices for communicating in the high band of frequencies at separated points to a conductive path of the two-wire telephone network, including coupling a first device, a second device, and a third device to said network;
at a first time, transmitting information from the second device onto the two-wire telephone network in a shared range of frequencies in the high band of frequencies to the first device, and concurrently disabling the third device from transmitting onto the said network in said shared range of frequencies; and
at a second time, transmitting information from the third device onto the two-wire telephone network in the shared range of frequencies in the high band of frequencies to the first device, and concurrently disabling the second device from transmitting onto the said network in said shared range of frequencies. - View Dependent Claims (55, 56, 57, 58, 59, 60)
coupling circuitry between the two-wire telephone network and one or more telephone device; and
presenting a high impedance in the high band of frequencies at said circuitry to the two-wire telephone network.
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56. The method of claim 55 further comprising:
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coupling circuitry between the two-wire telephone network and the plurality of devices for communicating in the high band of frequencies; and
blocking signals outside the high band of frequencies from passing from the two-wire telephone network through said circuitry to said devices.
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57. The method of claim 54 wherein the two-wire telephone network includes one or more splits forming branches in the network, and wherein transmitting information from the second device onto the two-wire telephone network includes:
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accepting an information-bearing signal; and
processing said information-bearing signal for transmission to the first device, including reducing signal degradation caused by the branching of the network.
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58. The method of claim 57 wherein processing said signal includes frequency-shifting the information-bearing signal.
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59. The method of claim 57 wherein processing said signal includes spectral pre-emphasis of said signal.
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60. The method of claim 57 wherein transmitting information from the second device onto the two-wire telephone network includes balancing the signal transmitted onto the two-wire telephone network.
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61. A method for distributing information in a high band of frequencies above a telephone voice band of frequencies over a two-wire telephone network forming a conductive path between devices coupled to said network and used to carry telephone voice signals in the telephone voice band, said method comprising:
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coupling a plurality of devices for communicating in the high band of frequencies at separated points to the conductive path;
at a first time, transmitting information from a first of the plurality of devices onto the two-wire telephone network in a shared range of frequencies in the high band of frequencies, and concurrently disabling a second of the plurality of devices from transmitting onto the said network in said shared range of frequencies; and
at a second time, transmitting information from the second of the devices onto the two-wire telephone network in the shared range of frequencies in the high band of frequencies, and concurrently disabling the first of the devices from transmitting onto the said network in said shared range of frequencies;
wherein the two-wire telephone network includes a segment that forms a branch on the conductive path and wherein transmitting information from the first of the devices and from the second of the devices onto the two-wire telephone network includes processing the information to form signals to mitigate effects resulting from the branch on the conductive paths. - View Dependent Claims (62, 63)
coupling circuitry between the two-wire telephone network and one or more telephone device at locations other that locations of the plurality of devices; and
presenting a high impedance in the high band of frequencies at said circuitry to the two-wire telephone network.
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63. The method of claim 62 further comprising:
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coupling circuitry between the two-wire telephone network and the plurality of devices for communicating in the high band of frequencies; and
blocking signals outside the high band of frequencies from passing from the two-wire telephone network through said circuitry to said devices.
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Specification