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Method and apparatus for noise reduction by filtering based on a maximum signal-to-noise ratio and an estimated noise level
Method and apparatus for noise reduction by filtering based on a maximum signal-to-noise ratio and an estimated noise level
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机译:通过基于最大信噪比和估计的噪声水平进行滤波来降低噪声的方法和装置
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摘要
A method for reducing the noise in an speech signal by removing the noise from an input speech signal is disclosed. The noise reducing method includes converting the input speech signal into a frequency spectrum, determining filter characteristics based upon a first value obtained on the basis of the ratio of a level of the frequency spectrum to an estimated level of the noise spectrum contained in the frequency spectrum and a second value as found from the maximum value of the ratio of the frame-based signal level of the frequency spectrum to the estimated noise level and the estimated noise level, and reducing the noise in the input speech signal by filtering responsive to the filter characteristics. A corresponding apparatus for reducing the noise is also disclosed.
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