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Signal transmission system

  • US 5,193,208 A
  • Filed: 04/26/1991
  • Issued: 03/09/1993
  • Est. Priority Date: 05/14/1990
  • Status: Expired due to Term
First Claim
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1. A signal transmission system in which a plurality of electronic apparatus for respectively transmitting audio and/or video information are concentratedly installed in a single room, and said audio and/or video information from said plurality of said electronic apparatus are modulated by respective carrier frequencies in a frequency-multiplexed fashion and transmitted to a plurality of rooms via a single cable, comprising:

  • main control means, including means connected to said plurality of electronic apparatus and transmitting remote control signals to control said plurality of electronic apparatus, and means for modulating said audio and/or video information and said remote control signals in a frequency-multiplexed fashion and for allocating said audio and/or video information and said remote control information on respective channels, each having said carrier frequencies;

    a plurality of receiving means, including means for selectively receiving one of said audio and/or video information from said electronic apparatus through said main control means, and input means for inputting a command to request to transmit said audio and/or video information from said electronic apparatus, and means for transmitting said remote control signals modulated by a predetermined carrier frequency to said main control means;

    a cable means for transmitting said frequency-multiplexed, modulated audio and/or video signals and remote control signals between said main control means and said plurality of receiving means; and

    means for giving priority to at least one of said plurality of receiving means which first transmitted a remote control signal to said main control means at the first time to operate one of said electronic apparatuses, and counting means for counting which is started under a condition when another of said receiving means has stopped said operation, and erasing means for erasing said priority after said counting means counts a predetermined number of times.

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