Broadband cable television and computer network
First Claim
Patent Images
1. A method of communicating data between computing devices comprising:
- receiving a video signal from headend transmission equipment of a cable television transmission system;
filtering out a portion of said video signal in the range of approximately 50 MHz to approximately 750 MHz to produce a filtered signal;
coupling said filtered signal to unlooped cable television wiring;
coupling a plurality of personal computers to said cable television wiring, wherein each of at least some of said personal computers comprises a receiver configured to receive video signals from said headend transmission equipment, a transmitter for forwarding signals to said headend transmission equipment, and a modem configured to receive and transmit broadband signals between said personal computers;
communicating messages between different ones of said personal computers via said modem by modulating a carrier having a frequency within said filtered out portion; and
forwarding signals from at least one of said personal computers to said cable television transmission system using a carrier frequency in the range of approximately 0 MHz to approximately 50 MHz.
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0 Petitions
Accused Products
Abstract
A communication system is provided which may comprise an upstream source of broadband communications and a downstream local area network, wherein the upstream source of broadband communications is coupled to the downstream local area network through a notch filter. In some embodiments, the upstream source of broadband communications may be a cable television service provider, and the local area computer network may use existing cable television wiring as communication cable.
144 Citations
17 Claims
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1. A method of communicating data between computing devices comprising:
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receiving a video signal from headend transmission equipment of a cable television transmission system;
filtering out a portion of said video signal in the range of approximately 50 MHz to approximately 750 MHz to produce a filtered signal;
coupling said filtered signal to unlooped cable television wiring;
coupling a plurality of personal computers to said cable television wiring, wherein each of at least some of said personal computers comprises a receiver configured to receive video signals from said headend transmission equipment, a transmitter for forwarding signals to said headend transmission equipment, and a modem configured to receive and transmit broadband signals between said personal computers;
communicating messages between different ones of said personal computers via said modem by modulating a carrier having a frequency within said filtered out portion; and
forwarding signals from at least one of said personal computers to said cable television transmission system using a carrier frequency in the range of approximately 0 MHz to approximately 50 MHz. - View Dependent Claims (2)
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3. A method of making a local-area-network, said local-area-network comprising a first personal computer and a second personal computer, the method comprising:
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receiving a video signal from headend transmission equipment of a cable television distribution system, said video signal comprising a plurality of separate television broadcasts within the frequency range of approximately 50 MHz to 750 MHz;
filtering out one or more of said television broadcasts of said video signal with a notch filter to produce a filtered signal;
outputting said filtered signal to an unlooped cable;
providing at least one of said first and second personal computers with a receiver configured to receive video signals from said headend transmission equipment, a transmitter for forwarding signals to said headend transmission equipment, and a modem configured to receive and transmit broadband signals between said first and second personal computers; and
connecting said first personal computer and said second personal computer to said cable. - View Dependent Claims (4, 5)
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6. A local area network comprising:
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a notch filter configured to receive a video signal from a cable television transmission system and to filter out a portion of said video signal in the range of approximately 50 MHz to approximately 750 MHz to produce a filtered signal;
an unlooped cable television wire configured to receive said filtered signal;
a plurality of personal computers coupled to said wire, wherein at least some of said personal computers comprise a receiver configured to receive video signals from said cable television transmission system, a transmitter configured to forward signals to said cable television transmission system, and a modem configured to receive and transmit broadband signals between said personal computers;
wherein said personal computers are configured to communicate messages between different ones of said personal computers via said modem by modulating a carrier having a frequency within said filtered out portion; and
wherein at least one of said personal computers is configured to forward signals to said cable television transmission system using a carrier frequency in the range of approximately 0 MHz to approximately 50 MHz. - View Dependent Claims (7, 8, 9, 10, 11)
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12. A local area network comprising:
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means for receiving a video signal from a cable television transmission system;
means for filtering out a portion of said video signal in the range of approximately 50 MHz to approximately 750 MHz to produce a filtered signal;
an unlooped cable television wire configured to receive said filtered signal, wherein said wire is located in a residential building;
a plurality of personal computers coupled to said wire, wherein each of at least some of said personal computers comprises;
means for receiving said filtered signal;
means for forwarding signals to said cable television transmission system; and
means for receiving and transmitting signals between different ones of said personal computers;
wherein said personal computers are configured to communicate via said modem by modulating a carrier having a frequency within said filtered out portion; and
wherein at least one of said personal computers is configured to forward signals to said cable television transmission system using a carrier frequency in the range of approximately 0 MHz to approximately 50 MHz. - View Dependent Claims (13, 14, 15, 16, 17)
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Specification