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Classification-based frame loss concealment for audio signals

  • US 8,015,000 B2
  • Filed: 04/13/2007
  • Issued: 09/06/2011
  • Est. Priority Date: 08/03/2006
  • Status: Active Grant
First Claim
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1. A method for performing frame loss concealment (FLC) in an audio decoder, comprising:

  • performing a first analysis on a previously-decoded portion of an audio signal, wherein performing the first analysis includes generating a feature set, wherein the feature set includes at least a short-term speech likelihood measure and a long-term speech likelihood measure;

    classifying a lost frame as either speech or music based on the results of the first analysis;

    performing a second analysis on the previously-decoded portion of the audio signal, wherein performing the second analysis comprises using at least the short-term speech likelihood measure and the long-term speech likelihood measure; and

    selecting either a first FLC technique or a second FLC technique for replacing the lost frame based on the classification and the results of the second analysis.

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