Noise Suppression Estimation Device and Noise Suppression Device
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United States of America Patent
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Issued Date -
Jan 14, 2010
app pub date -
Jul 8, 2009
filing date -
Jul 9, 2008
priority date (Note) -
Abandoned
status (Latency Note)
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Abstract
A noise suppression estimation device calculates a noise index value which varies according to kurtosis of a frequence distribution of magnitude of a sound signal before or after suppression of the noise component, the noise index value indicating a degree of occurrence of musical noise after suppression of the noise component in a frequency domain. For example, the noise suppression estimation device calculates first kurtosis of a frequence distribution of magnitude of the sound signal before suppression of the noise component, calculates second kurtosis of a frequence distribution of magnitude of the sound signal after suppression of the noise component, and calculates the noise index value from the first kurtosis and the second kurtosis.
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