Parameter optimization in time-frequency ε-filter based on correlation coefficient

Tomomi Abe, Mitsuharu Matsumoto, Shuji Hashimoto

    Research output: Chapter in Book/Report/Conference proceedingConference contribution

    4 Citations (Scopus)

    Abstract

    Time-Frequency ε-filter (TF ε-filter) can reduce most kinds of noise from a single-channel noisy signal with preserving the signal that varies drastically such as a speech signal. The filter design is simple and it can effectively reduce noise. It can reduce not only small stationary noise but also large nonstationary noise. However, it has some parameters and we need to set them appropriately based on empirical control. So far, there are few studies to evaluate the appropriateness of the parameter setting of ε-filter in general. In this paper, we employ correlation coefficient of the filter output and the difference between the input and the filter output as the evaluation function of the parameter setting. We also show the algorithm to set the optimal parameter of TF ε-filter. We conducted the experiments to compare the value of the correlation coefficient and the mean square error when we change ε value. The experimental results show the applicability of our criterion in parameter setting of ε-filter.

    Original languageEnglish
    Title of host publicationSIGMAP 2009 - International Conference on Signal Processing and Multimedia Applications, Proceedings
    Pages107-111
    Number of pages5
    Publication statusPublished - 2009
    EventSIGMAP 2009 - International Conference on Signal Processing and Multimedia Applications - Milan
    Duration: 2009 Jul 72009 Jul 10

    Other

    OtherSIGMAP 2009 - International Conference on Signal Processing and Multimedia Applications
    CityMilan
    Period09/7/709/7/10

    Keywords

    • ε-filter
    • Noise reduction
    • Parameter optimization
    • Time-frequency domain

    ASJC Scopus subject areas

    • Computer Graphics and Computer-Aided Design
    • Signal Processing

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  • Cite this

    Abe, T., Matsumoto, M., & Hashimoto, S. (2009). Parameter optimization in time-frequency ε-filter based on correlation coefficient. In SIGMAP 2009 - International Conference on Signal Processing and Multimedia Applications, Proceedings (pp. 107-111)