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Critical Band Subspace-Based Speech Enhancement Using SNR and Auditory Masking Aware Technique Jia-Ching WANG Hsiao-Ping LEE Jhing-Fa WANG Chung-Hsien YANG Publication IEICE TRANSACTIONS on Information and Systems Vol.E90-D No.7 pp.1055-1062 Publication Date: 2007/07/01 Online ISSN: 1745-1361 DOI: 10.1093/ietisy/e90-d.7.1055 Print ISSN: 0916-8532 Type of Manuscript: PAPER Category: Speech and Hearing Keyword: human auditory system, Karhunen-Loeve transform (KLT), in-car noise, signal subspace, speech enhancement, perceptual filterbank, wavelet transform, Full Text: PDF(851.4KB)>>
Summary: In this paper, a new subspace-based speech enhancement algorithm is presented. First, we construct a perceptual filterbank from psycho-acoustic model and incorporate it in the subspace-based enhancement approach. This filterbank is created through a five-level wavelet packet decomposition. The masking properties of the human auditory system are then derived based on the perceptual filterbank. Finally, the prior SNR and the masking threshold of each critical band are taken to decide the attenuation factor of the optimal linear estimator. Five different types of in-car noises in TAICAR database were used in our evaluation. The experimental results demonstrated that our approach outperformed conventional subspace and spectral subtraction methods. | ||||||||||
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