Noise reduction based on cross TF ε-filter

Tomomi Abe*, Mitsuharu Matsumoto, Shuji Hashimoto

*この研究の対応する著者

    研究成果: Conference contribution

    抄録

    A time-frequency ε-filter (TF ε-filter) is an advanced ε-filter applied to complex spectra along the time axis. It can reduce most kinds of noise while preserving a signal that varies frequently such as a speech signal. The filter design is simple and it can effectively reduce noise. It is applicable not only to small amplitude stationary noise but also to large amplitude nonstationary noise. However when we consider the noise that varies much frequently along the time axis, TF ε-filter cannot reduce noise without the signal distortion. When we consider the noise where the neighboring frequency bins have similar powers such as impulse noise, we can reduce the noise by using ε-filter applied to the complex spectra not along the time axis, but along the frequency axis. This paper introduces an advanced method for noise reduction that applies ε-filter to complex spectra not only along the time axis but also along the frequency axis labeled cross TF ε-filter. We conducted the experiments utilizing the sounds with stationary, nonstationary and natural noise.

    本文言語English
    ホスト出版物のタイトルSIGMAP 2008 - Proceedings of the International Conference on Signal Processing and Multimedia Applications
    ページ105-112
    ページ数8
    出版ステータスPublished - 2008
    イベントSIGMAP 2008 - International Conference on Signal Processing and Multimedia Applications - Porto
    継続期間: 2008 7 262008 7 29

    Other

    OtherSIGMAP 2008 - International Conference on Signal Processing and Multimedia Applications
    CityPorto
    Period08/7/2608/7/29

    ASJC Scopus subject areas

    • コンピュータ グラフィックスおよびコンピュータ支援設計
    • 信号処理

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