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Noise reduction system

  • US 20040024596A1
  • Filed: 07/31/2003
  • Published: 02/05/2004
  • Est. Priority Date: 07/31/2002
  • Status: Abandoned Application
First Claim
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1. A system for reducing noise in a wideband signal having at least one narrow frequency component comprising:

  • a filterbank comprising a first filter having a first frequency and a first output and a second filter having a second frequency and a second output, wherein the phases of said first frequency and said second frequency differ by 180 degrees about a third frequency;

    a running cross-correlator interconnected to said first filterbank for comparing said first output of said first filter and said second output of said second filter; and

    an analysis-synthesis filterbank for attenuating said wideband signal at said third frequency in response to said running cross-correlator.

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