An Improved Spectral Subtraction Method Based on Multitaper Estimation
Zou Ming · Modern Electronics Technique · 2008
In all speech enhancement methods,spectral subtraction,which is simply and efficient,is widely used.Usually,the periodogram method is used in spectral subtraction to estimate the speech signal′s power spectra.However,it has large and inaccurate variance which causes musical noise.The multitaper estimation has a lower variance.So the combination of multitaper estimation and spectral subtraction can reduce musical noise obviously.The experiment results also show that the multitaper method is better than the periodogram method in restraining musical noise,and improves the SNR by 1～2 dB.