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Noise Eliminating Apparatus

  • US 20090214054A1
  • Filed: 03/07/2006
  • Published: 08/27/2009
  • Est. Priority Date: 03/07/2005
  • Status: Active Grant
First Claim
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1. A noise eliminating apparatus comprising a first microphone, a second microphone and a signal processing unit, wherein:

  • the signal processing unit includes a linear prediction filter and a noise resynthesis filter;

    the linear prediction filter receives an output signal of the first microphone, predicts the output signal of the first microphone by linear prediction and generates a prediction signal; and

    the noise resynthesis filter is an adaptive filter which receives, as a main input signal, a first difference signal obtained by subtracting one of the output signal of the first microphone and the prediction signal from the other, receives, as an error signal, a second difference signal obtained by subtracting one of an output signal of the second microphone and an output signal of the noise resynthesis filter itself from the other, and updates a filter coefficient so that the error signal is minimized.

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