发明名称 |
VOICE PROCESSING DEVICE, NOISE SUPPRESSION METHOD, AND COMPUTER-READABLE RECORDING MEDIUM STORING VOICE PROCESSING PROGRAM |
摘要 |
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. |
申请公布号 |
US2015248895(A1) |
申请公布日期 |
2015.09.03 |
申请号 |
US201514628416 |
申请日期 |
2015.02.23 |
申请人 |
FUJITSU LIMITED |
发明人 |
Matsumoto Chikako |
分类号 |
G10L21/0232;G10L21/0264;G10L21/0364;G10L25/84 |
主分类号 |
G10L21/0232 |
代理机构 |
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代理人 |
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主权项 |
1. A voice processing device comprising:
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. |
地址 |
Kawasaki-shi JP |