Abstract
In this paper, a new speech enhancement based on the nonlinear H ∞ filtering and neural predictive HMM (NPHMM) is presented. In H ∞ filtering, no a priorknowledge of the noise source statistics is required. Speech is modeled as the output of a neural predictive HMM combining MLP neural network and HMM. The proposed enhancement method consists of multiple nonlinear H ∞ filters with parameter of the NPHMM. The switching between the nonlinear H ∞ filters is governed by a finite state Markov chain according to the transition probabilities. An approximate improvement of 0.4-1.8dB in output SNR is achieved at various input SNRs compared with conventional Kalman method.
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© 2005 Springer-Verlag Berlin Heidelberg
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Lee, K.Y., Rheem, J.Y. (2005). Robust Speech Enhancement Based on NPHMM Under Unknown Noise. In: Chollet, G., Esposito, A., Faundez-Zanuy, M., Marinaro, M. (eds) Nonlinear Speech Modeling and Applications. NN 2004. Lecture Notes in Computer Science(), vol 3445. Springer, Berlin, Heidelberg. https://doi.org/10.1007/11520153_29
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DOI: https://doi.org/10.1007/11520153_29
Publisher Name: Springer, Berlin, Heidelberg
Print ISBN: 978-3-540-27441-4
Online ISBN: 978-3-540-31886-6
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