A Brief Survey of Speech Enhancement
William J. Roberts, Y. Ephraim, H. Lev-Ari · 2005
We present a brief overview of the speech enhancement problem for wide-band noise sources that are not correlated with the speech signal. Our main focus is on the spectral subtraction approach and some of its derivatives in the forms of linear and non-linear minimum mean square error estimators. For the linear case, we review the signal subspace approach, and for the non-linear case, we review spectral magnitude and phase estimators. On line estimation of the second order statistics of speech signals using parametric and non-parametric models is also addressed.