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Method of noise reduction based on dynamic aspects of speech

  • US 7,107,210 B2
  • Filed: 05/20/2002
  • Issued: 09/12/2006
  • Est. Priority Date: 05/20/2002
  • Status: Active Grant
First Claim
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1. A method for reducing noise in a noisy input signal, the method comprising:

  • converting a frame of the noisy input signal into an input feature vector;

    obtaining a static-based prediction for a noise-reduced feature vector using a prior model of static aspects of clean signals;

    obtaining a dynamic-based prediction for the noise-reduced feature vector using a prior model of dynamic aspects of clean signals;

    combining the static-based prediction and the dynamic-based prediction to form at least part of a combined prediction; and

    multiplying the combined prediction by a measure of the probability of the input feature vector occurring to produce at least one component of the noise-reduced feature vector.

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