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Theoretical musical-noise analysis and its generalization for methods of integrating beamforming and spectral subtraction based on higher-order statistics

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4 Author(s)
Yu Takahashi ; Nara Institute of Science and Technology, 630-0192 Japan ; Hiroshi Saruwatari ; Kiyorhiro Shikano ; Kazunobu Kondo

In this paper, we conduct a theoretical analysis of the amount of musical noise generated via methods of integrating beamforming and spectral subtraction (SS) based on higher-order statistics under the same noise reduction performance condition. In our previous analysis, we did not consider the effect of flooring technique in SS and the fact that the noise reduction performances of the integration methods are not equivalent. Then, in this study, we analyze the amount of generated musical noise with consideration of such problems. As a result of the analysis, it is clarified that an appropriate structure depends on both the parameters of SS and the statistical characteristics of the input signal. Moreover, it is also revealed that a specific structure is proper to reduce the musical noise for almost all cases.

Published in:

2010 IEEE International Conference on Acoustics, Speech and Signal Processing

Date of Conference:

14-19 March 2010