Speech enhancement based on modulation domain processing using coherent harmonic demodulation technique
Suman Samui, Indrajit Chakrabarti, Soumya K. Ghosh · Electronics Letters · 2017
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.