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Speech coding and decoding system with background sound reproducing function

  • US 5,142,582 A
  • Filed: 04/20/1990
  • Issued: 08/25/1992
  • Est. Priority Date: 04/28/1989
  • Status: Expired due to Fees
First Claim
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1. A speech decoding apparatus for decoding a speech code signal transmitted via a transmission medium and an error correcting code for detecting and correcting code errors in said speech code signal, comprising:

  • receiving means for receiving a transmission code signal including said error correcting code from said transmission medium;

    decoding means for detecting a code error corresponding to said error correcting code and for separating said speech code signal from said transmission code signal, said detecting means including means for correcting an erroneous code of said speech code signal in accordance with a predetermined rule and for generating error indicating information corresponding to said code error, said error indicating information indicating that said erroneous code cannot be corrected;

    speech decoding means for decoding said speech code signal separated from said transmission code signal in accordance with a predetermined process to generate a decoded speech signal;

    background sound generating means for generating a background sound signal corresponding to background sound corresponding to said decoded speech signal; and

    switching controlling means for controlling said speech decoding means and said background sound generating means to select said speech code signal or said background sound signal in accordance with said error indicating information.

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