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Interleaved digital data and voice communications system apparatus and method

  • US 4,528,659 A
  • Filed: 12/17/1981
  • Issued: 07/09/1985
  • Est. Priority Date: 12/17/1981
  • Status: Expired due to Term
First Claim
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1. An interleaved digitized voice and data communications system, comprising:

  • a digitized data and voice transmitter and a digitized data and voice receiver, and a communications link connecting said transmitter and said receiver;

    said transmitter comprising a voice input and a data input and means for detecting the momentary absence of voice signals, said detecting means being connected to said voice input;

    controlling means responsive to the detection of momentary absence of voice signals by said detecting means and connected to said detecting means for controlling the admission of data signals from said data input into said transmitter and for connecting said voice or data signals, respectively, to said communications link;

    a digital bit pattern generator means for generating a digital pattern code not used as a normal voice signal code;

    encoding means connected to said digital bit pattern generator and to said data input for encoding a combined digital pattern code and data pattern having at least one scaling bit altered to a condition not used for voice transmission; and

    means for supplying said encoded patterns to said controlling means, said controlling means applying said patterns to said communication link;

    said digital data and voice receiver comprising a communications link input connection to said receiver and a digital speech output port and a digital data output port therefrom;

    digital pattern code detecting means connected to said input and a selector means connected to said input;

    said selector means being connected to said pattern detecting means and responsive to an indication therefrom that no said pattern code exists for applying the signals from said input connection to said digital speech output and responsive to an indication of the presence of a pattern code therefrom for blocking any signal application to said digital speech output; and

    data byte decoder means connected to said pattern code detecting means and to said digital data output for removing said pattern code from said combined digital pattern code and data pattern and applying a digital data byte at said output for each combined digital data and encoded pattern input supplied thereto.

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