Gain-smoothing in wideband speech and audio signal decoder

  • US 7,191,123 B1
  • Filed: 11/17/2000
  • Issued: 03/13/2007
  • Est. Priority Date: 11/18/1999
  • Status: Active Grant
First Claim
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1. A method for producing a gain-smoothed codevector during decoding of an encoded wideband signal from a set of wideband signal encoding parameters, said method comprising:

  • finding a codevector in relation to at least one first wideband signal encoding parameter of said set;

    calculating a first factor representative of voicing in the wideband signal in response to at least one second wideband signal encoding parameter of said set;

    calculating a second factor representative of stability of said wideband signal in response to at least one third wideband signal encoding parameter of said set;

    calculating a smoothing gain based on said first and second factors; and

    amplifying the found codevector with said smoothing gain to thereby produce said gain-smoothed codevector.

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