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Speech enhancement based on nonnegative matrix factorization with mixed group sparsity constraint

By Hien-Thanh Duong, Quoc-Cuong Nguyen, Cong-Phuong Nguyen, Thanh-Huan Tran and Ngoc Q. K. Duong

Abstract

International audienceThis paper addresses a challenging single-channel speech enhancement problem in real-world environment where speech signal is corrupted by high level background noise. While most state-of-the-art algorithms tries to estimate noise spectral power and filter it from the observed one to obtain enhanced speech, the paper discloses another approach inspired from audio source separation technique. In the considered method, generic spectral characteristics of speech and noise are first learned from various training signals by non-negative matrix factorization (NMF). They are then used to guide the similar factorization of the observed power spectrogram into speech part and noise part. Additionally, we propose to combine two existing group sparsity-inducing penalties in the optimization process and adapt the corresponding algorithm for parameter estimation based on mul-tiplicative update (MU) rule. Experiment results over different settings confirm the effectiveness of the proposed approach

Topics: spectral model, group sparsity, Speech enhancement, audio source separation, nonnegative matrix factorization, multiplicative update, [STAT.ML]Statistics [stat]/Machine Learning [stat.ML], [INFO.INFO-HC]Computer Science [cs]/Human-Computer Interaction [cs.HC], [INFO.INFO-TS]Computer Science [cs]/Signal and Image Processing
Publisher: 'Association for Computing Machinery (ACM)'
Year: 2015
DOI identifier: 10.1145/2833258.2833276
OAI identifier: oai:HAL:hal-01288291v1
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