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Intonation transformation for speech therapy and the like

  • US 7,373,294 B2
  • Filed: 05/15/2003
  • Issued: 05/13/2008
  • Est. Priority Date: 05/15/2003
  • Status: Active Grant
First Claim
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1. A method for generating an output audio signal from an input audio signal having a number of pitch cycles, each input pitch cycle represented by a plurality of data points, the method comprising a combination of resampling and harmonic scaling, wherein:

  • the resampling comprises changing the number of data points in an audio signal, wherein the resampling comprises an upsampling phase followed by a downsampling phase to achieve a desired resampling ratio, wherein;

    the upsampling phase comprises upsampling the audio signal based on an upsampling rate value to generate an upsampled signal; and

    the downsampling phase comprises downsampling the upsampled signal based on a downsampling rate value selected to achieve, in combination with the upsampling phase, the desired resampling ratio; and

    the harmonic scaling comprises changing the number of pitch cycles in an audio signal, wherein the output audio signal has a pitch that is different from the pitch of the input audio signal.

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