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Noise Detection for Audio Encoding by Mean and Variance Energy Ratio

  • US 20090043590A1
  • Filed: 10/20/2008
  • Published: 02/12/2009
  • Est. Priority Date: 08/23/2004
  • Status: Active Grant
First Claim
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1. A method, comprising:

  • calculating mean and variance energies for each frequency band of a signal;

    defining boundaries for a ratio of the mean and variance energies in each frequency band of the signal; and

    determining if each frequency band of the signal is noise or noise-like using the defined boundaries and a stage of two or more decisions.

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