Voice processing device, noise suppression method, and computer-readable recording medium storing voice processing program
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United States of America Patent
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Sep 12, 2017
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app pub date -
Feb 23, 2015
filing date -
Mar 3, 2014
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Abstract
A voice processing device includes a noise-originating coefficient calculation section that calculates a noise-originating coefficient that gradually decreases as a target value of stationary noise for each frequency increases, the target value being calculated based on an amplitude value of a frequency spectrum obtained by time-frequency transforming a voice signal for a predetermined period of time, and a suppression signal generation section that generates, when the frequency spectrum is determined as being stationary on the basis of the amplitude value, a suppression signal by multiplying a suppression coefficient based on the noise-originating coefficient by the amplitude value, the suppression signal being frequency-time transformed to be output.
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