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Speech bandwidth extension

  • US 6,889,182 B2
  • Filed: 12/20/2001
  • Issued: 05/03/2005
  • Est. Priority Date: 01/12/2001
  • Status: Active Grant
First Claim
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1. A method of generating a wide-band speech signal from a first narrow-band speech signal, the method comprising:

  • analyzing the first narrow-band speech signal to generate one or more parameters;

    synthesizing a lower frequency-band signal based on at least one of the one or more parameters; and

    combining the synthesized lower frequency-band signal with a second narrow-band speech signal that is derived from the first narrow-band speech signal, wherein;

    the one or more parameters include a pitch frequency parameter; and

    synthesizing the lower frequency-band signal based on at least one of the one or more parameters comprises generating continuous sine tones that are based on the pitch frequency parameter.

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