© The Institution of Engineering and Technology
This Letter presents a single-channel speech enhancement technique based on modulation domain signal processing. In the proposed approach, noise-dominant low-frequency (4–16 Hz) temporal modulation envelopes are discarded based on the modulation domain a priori signal-to-noise ratio criterion. Moreover, the authors have employed coherent harmonic demodulation method which ensures distortion-free filtering of modulators. The experiment results in various acoustic non-stationary noise scenario show that the proposed approach can significantly improve the speech quality and intelligibility while compared to the other existing state-of-the-art baseline techniques.
References
-
-
1)
-
5. Wojcicki, K.K., Loizou, P.C.: ‘Channel selection in the modulation domain for improved speech intelligibility in noise’, J. Acoust. Soc. Am., 2012, 131, pp. 2904–2913 (doi: 10.1121/1.3688488).
-
2)
-
4. Clark, P., Atlas, L.E.: ‘Time-frequency coherent modulation filtering of non-stationary signals’, Trans. Signal Process., 2009, 57, pp. 4323–4332 (doi: 10.1109/TSP.2009.2025107).
-
3)
-
7. Hu, Y., Loizou, P.C.: ‘Subjective comparison and evaluation of speech enhancement algorithms’, Speech Commun., 2007, 49, (7), pp. 588–601 (doi: 10.1016/j.specom.2006.12.006).
-
4)
-
2. Drullman, R., Festen, J.M., Plomp, R.: ‘Effect of reducing slow temporal modulations on speech reception’, J. Acoust. Soc. Am., 1994, 95, pp. 2670–2680 (doi: 10.1121/1.409836).
-
5)
-
3. Paliwal, K., Schwerin, B., Wojcicki, K.: ‘Single channel speech enhancement using MMSE estimation of short-time modulation magnitude spectrum’, Interspeech, Florence, Italy, August 2011, pp. 1209–1212.
-
6)
-
4. So, S., Paliwal, K.K.: ‘Modulation-domain Kalman filtering for single-channel speech enhancement’, Speech Commun., 2011, 53, (6), pp. 818–829 (doi: 10.1016/j.specom.2011.02.001).
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