Modulation Spectral Features for Intrusive Measurement of Reverberant Speech Quality

Temporal fine structure includes temporal envelope and fine structure which also called carrier, and instantaneous frequency is the partial derivative of the carrier. An intrusive reverberant speech quality measurement is investigated with the representation of corresponding instantaneous frequency. A Gammatone filterbank is used to simulate auditory mechanism and a modulation filterbank is used to improve frequency resolution. The mean mutual information between reference and reverberant modulation spectral instantaneous frequency probability distribution is taken as the final measurement score. Experimental results show the proposed method outperforming two benchmark algorithms in some practical application conditions.