System and method of voice activity detection in noisy environments
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United States of America Patent
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Aug 3, 2010
Grant Date -
Oct 9, 2008
app pub date -
Apr 5, 2007
filing date -
Apr 5, 2007
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Abstract
An efficient voice activity detection method and system suitable for real-time operation in low SNR (signal-to-noise) environments corrupted by non-Gaussian non-stationary background noise. The method utilizes rank order statistics to generate a binary voice detection output based on deviations between a short-term energy magnitude signal and a short-term noise reference signal. The method does not require voice-free training periods to track the background noise nor is it susceptible to rapid changes in overall noise level making it very robust. In addition a long-term adaptation mechanism is applied to reject harmonic or tonal interference.
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