Single-Channel Suppression of Background Noise in Speech Signals

This seminar paper shows the basics of background-noise suppression using the theory of spectral subtraction (Virag) and using either DFT or an auditory gammatone-filterbank (Slaney). The results from the uniform block-DFT based approach is further compared to the results obtained by the time-domain auditory filterbank approach. Moreover, the paper shows how to estimate background noise and eliminate musical-noise in post-processing.