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Preprocessing of digital audio data for improving perceptual sound quality on a mobile phone

  • US 7,430,506 B2
  • Filed: 01/08/2004
  • Issued: 09/30/2008
  • Est. Priority Date: 01/09/2003
  • Status: Expired due to Fees
First Claim
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1. A method for processing an audio signal, comprising the steps of:

  • performing a pitch harmonic enhancement (“

    PHE”

    ) preprocessing of the audio signal, wherein the PHE preprocessing enhances the pitch components of the audio signal;

    determining an encoding rate from a plurality of encoding rates based on a characteristic of the PHE preprocessed audio signal; and

    encoding the PHE preprocessed audio signal with the determined encoding rate at a codec having the plurality of encoding rates.

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