A novel Short Time Fourier Transform (STFT) based speech enhancement method is introduced. This method enhances the magnitude spectrum of a noisy speech segment. The new idea that is used in this method is to basically reconstruct the harmonics at the multiples of the fundamental frequency (F0) rather than trying to improve them. The harmonics are produced, in the magnitude spectrum, using the knowledge of the window function we are using for the STFT. These harmonics are then scaled and laid on multiples of F0.
Experimental results prove the effectiveness of this enhancement method in various noisy conditions and various SNR ratios.
Bibliographic reference. Abolhassani, Iman Haji / Selouani, Sid-Ahmed / O'Shaughnessy, Douglas (2009): "STFT-based speech enhancement by reconstructing the harmonics", In INTERSPEECH-2009, 1371-1374.