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Band-pass bilateral filter is an improved bilateral filter which does not have low-pass characteristics but has band-pass characteristics to enhance image contrast around edges. However, the computation time is relatively large due to Gaussian calculation in all pixels. To reduce the calculation cost, we look to a nonlinear filter called epsilon-filter and propose an advanced epsilon-filter which...
This paper describes a blind separation algorithm of monaural sound based on peak tracking of frequency spectra. We have already reported a blind separation method based on the change ratio of frequency components. However, it cannot handle a signal with frequency fluctuation such as a speech signal or a vibrato tone, because such type of signal is regarded as the mixture of different sounds. Our...
This paper describes noise reduction based on a bilateral filter improved for an acoustical signal. A microphone array system has been utilized in various scenes. However, when we utilize the microphone array system in life space, the problem of back ground noise arises. Although the back ground noise is not always stationary, statistically independent or disjoint, the amplitude of the noise is usually...
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