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Bandwidth extension of narrowband speech

  • US 7,546,237 B2
  • Filed: 12/23/2005
  • Issued: 06/09/2009
  • Est. Priority Date: 12/23/2005
  • Status: Active Grant
First Claim
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1. A system that extends the bandwidth of a narrowband speech signal comprising:

  • a high-band generator that generates a high frequency spectrum based on a narrowband spectrum;

    a background noise generator that generates a high frequency background noise spectrum based on a background noise within the narrowband spectrum; and

    a summer coupled to the high-band generator and background noise generator that combines the high frequency band and narrowband spectrum with high frequency background noise spectrum.

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