| 摘要 |
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 fo r lower signal to background noise ratios. The method and apparatus provides noise reduction without any knowledge of the signal to background noise rati o.
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