ISCA Archive RSR 1997
ISCA Archive RSR 1997

Noise reduction with spectral subtraction and median filtering for suppression of musical tones

Klaus Linhard, Heinz Klemm

Spectral Subtraction is widely used for enhancing noise-corrupted speech signals. One of the main problems are "musical tones" in the filtered speech signal. Many solutions have been suggested to get rid of musical tones but they often lead to a poor speech quality or need cumbersome optimizations. We present a new approach based on nonlinear median filtering, which is easy to implement and especially efficient for suppressing musical tones without degrading the speech signal.