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Multi-Band Spectral Subtraction Method for Electrolarynx Speech Enhancement
Key Laboratory of Biomedical Information Engineering of Ministry of Education, Department of Biomedical Engineering, School of Life Science and Technology, Xi’an Jiaotong University, Xi’an 710049, P.R. China
Department of Biomedical Engineering, The Fourth Military Medical University, Xi’an 710032, P.R. China
* Author to whom correspondence should be addressed.
Received: 30 October 2008; in revised form: 6 February 2009 / Accepted: 25 February 2009 / Published: 13 March 2009
Abstract: Although the electrolarynx (EL) provides an important means of voice reconstruction for patients who lose their vocal cords by laryngectomies, the radiated noise and additive environment noise reduce the intelligibility of the resulting EL speech. This paper proposes an improved spectrum subtract algorithm by taking into account the non-uniform effect of colored noise on the spectrum of EL speech. Since the over-subtraction factor of each frequency band can be adjusted in the enhancement process, a better noise reduction effect was obtained and the perceptually annoying musical noise was efficiently reduced, as compared to other standard speech enhancement algorithms.
Keywords: Electrolarynx; multi-band; speech enhancement; spectral subtraction method
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MDPI and ACS Style
Li, S.; Wan, M.; Wang, S. Multi-Band Spectral Subtraction Method for Electrolarynx Speech Enhancement. Algorithms 2009, 2, 550-564.
Li S, Wan M, Wang S. Multi-Band Spectral Subtraction Method for Electrolarynx Speech Enhancement. Algorithms. 2009; 2(1):550-564.
Li, Sheng; Wan, MingXi; Wang, SuPin. 2009. "Multi-Band Spectral Subtraction Method for Electrolarynx Speech Enhancement." Algorithms 2, no. 1: 550-564.