Background noise reduction in sinusoidal based speech coding systems
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United States of America Patent
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Mar 16, 2010
Grant Date -
Jun 12, 2008
app pub date -
Jul 2, 2007
filing date -
Feb 11, 2000
priority date (Note) -
Expired
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Abstract
A method and apparatus to reduce background noise in speech signals in order to improve the quality and intelligibility of processed speech. In mobile communications environment, speech signals are degraded by additive random noise. A randomness of the noise, which is often described in terms of its first and second order statistics, make it difficult to remove much of the noise without introducing background artifacts. This is particularly true for lower signal to background noise ratios. The method and apparatus provides noise reduction without any knowledge of the signal to background noise ratio.
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