Method of noise reduction based on dynamic aspects of speech
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United States of America Patent
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Sep 12, 2006
Grant Date -
Nov 20, 2003
app pub date -
May 20, 2002
filing date -
May 20, 2002
priority date (Note) -
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Abstract
A system and method are provided that reduce noise in pattern recognition signals. To do this, embodiments of the present invention utilize a prior model of dynamic aspects of clean speech together with one or both of a prior model of static aspects of clean speech, and an acoustic model that indicates the relationship between clean speech, noisy speech and noise. In one embodiment, components of a noise-reduced feature vector are produced by forming a weighted sum of predicted values from the prior model of dynamic aspects of clean speech, the prior model of static aspects of clean speech and the acoustic-environmental model.
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