Method and apparatus for simultaneously transmitting video, sound, data and ordinary telephone service, bidirectionally over an ordinary twisted pair
First Claim
1. A method for simultaneously transmitting video information, an associate audio signal, a full-duplex data communication signal, a DSL signal and a telephonic audio signal over a single twisted copper pair wire, comprising the steps of:
- frequency modulating a first carrier signal in accordance with a first composite video signal to produce a first FM signal comprising a first upper sideband and a first lower sideband;
filtering said first FM signal with a first band pass filter to suppress said first upper sideband and to pass said first lower sideband to produce a first filtered signal having a frequency bandwidth of approximately 6 MHz;
frequency modulating said first carrier signal in accordance with a first communications signal to create a first combined signal, such that said first filtered signal is not degraded by said first communications signal;
frequency modulating said first carrier signal in accordance with a first voice signal to create a first VVD signal, such that said first combined signal is not degraded by said first voice signal; and
injecting said first VVD signal into a TCP wire.
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Abstract
An apparatus and method for modulating and simultaneously bi-directionally transmitting full-motion, television-quality color video signals and associated audio and data signals, together with a digital subscriber line (DSL) and plain old telephone service (POTS) over a single ordinary twisted copper pair telephone (TCP) wire. Video signals are transmitted using vestigial sideband transmission such that each video signal occupies approximately 6 MHz of bandwidth on the TCP wire. DSL data signals and POTS signals are transmitted on the TCP wire at non-interfering frequencies as are the audio and data channels associated with the video signals.
12 Citations
20 Claims
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1. A method for simultaneously transmitting video information, an associate audio signal, a full-duplex data communication signal, a DSL signal and a telephonic audio signal over a single twisted copper pair wire, comprising the steps of:
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frequency modulating a first carrier signal in accordance with a first composite video signal to produce a first FM signal comprising a first upper sideband and a first lower sideband;
filtering said first FM signal with a first band pass filter to suppress said first upper sideband and to pass said first lower sideband to produce a first filtered signal having a frequency bandwidth of approximately 6 MHz;
frequency modulating said first carrier signal in accordance with a first communications signal to create a first combined signal, such that said first filtered signal is not degraded by said first communications signal;
frequency modulating said first carrier signal in accordance with a first voice signal to create a first VVD signal, such that said first combined signal is not degraded by said first voice signal; and
injecting said first VVD signal into a TCP wire. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16)
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17. An apparatus for transmitting VVD signals over a single TCP wire comprising:
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a first frequency modulating means for frequency modulating a first carrier signal in accordance with a first composite video signal to produce a first FM signal comprising a first upper sideband and a first lower sideband;
a first signal filtering means for filtering said first FM signal with a first band pass filter to suppress said first upper sideband and to pass said first lower sideband to produce a first filtered signal, said first signal filtering means being coupled with said first frequency modulating means;
a second frequency modulating means for frequency modulating said first carrier signal in accordance with a first communications signal to create a first combined signal, such that said first filtered signal is not degraded by said first communications signal, said second frequency modulating means being operatively associated with said first signal filtering means;
a third frequency modulating means for frequency modulating said first carrier signal in accordance with a first voice signal to create a first VVD signal, such that said first combined signal is not degraded by said first voice signal, said third frequency modulating means being operatively associated with said first signal filtering means; and
a transmitting means for transmitting said first VVD signal over a TCP wire. - View Dependent Claims (18, 19, 20)
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Specification