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Multiple audio and video signal providing apparatus

  • US 5,600,365 A
  • Filed: 01/25/1995
  • Issued: 02/04/1997
  • Est. Priority Date: 01/28/1994
  • Status: Expired due to Term
First Claim
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1. A signal providing apparatus comprising:

  • digital video signal outputting means for outputting a plurality of compressed digital video signals;

    time-division multiplexing means for multiplexing a plurality of said compressed digital video signals by time-division;

    digital video signal modulating means for modulating the output signal from said time-division multiplexing means;

    frequency-division multiplexing means receiving the output signal from said digital video signal modulating means as a first input signal and a second input signal, for multiplexing said output signal from said digital video signal modulating means and said second input signal by frequency-division;

    tuner means receiving the output signal from said frequency-division multiplexing means, for demodulating said output signal from said frequency-division multiplexing means and for selecting a signal having a specific frequency;

    video signal selecting means for selecting one of said compressed digital video signals multiplexed by time-division in the output signal from said tuner means;

    expanding means for expanding the output signal from said video signal selecting means; and

    display means receiving the output signal from said expanding means, for displaying a video image;

    analog video signal outputting means for outputting an analog video signal;

    analog video signal modulating means for modulating said analog video signal and for providing a modulated analog video signal as said second input signal to said frequency-division multiplexing means; and

    decoding means for decoding said analog video signal, included in said output signal from said tuner means, into the output signal supplied to said display means;

    wherein said digital video modulating means and said analog video signal modulating means are RF-modulators modulating signals by carrier frequencies, each bandwidth of which is 6 MHz.

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