Automatic speech recognition with a modified Ephraim-Malah rule

A soft decision gain modification is introduced and applied to the Ephraim-Malah gain function based on maximum mean-square-error estimation after amplitude compression. Nonlinear evaluations of the noise overestimation factor and spectral floor are used in the same way for the proposed gain modification and for nonlinear spectral subtraction (NSS). Consistent and statistically significant automat...