发明名称 |
Weighted frequency-channel background noise suppressor |
摘要 |
A method for implementing a noise suppressor in a speech recognition system comprises a filter bank for separating source speech data into discrete frequency sub-bands to generate filtered channel energy, and a noise suppressor for weighting the frequency sub-bands to improve the signal-to-noise ratio of the resultant noise-suppressed channel energy. The noise suppressor preferably includes a noise calculator for calculating background noise values, a speech energy calculator for calculating speech energy values for each channel of the filter bank, and a weighting module for applying calculated weighting values to the projected channel energy to generate the noise-suppressed channel energy.
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申请公布号 |
US6826528(B1) |
申请公布日期 |
2004.11.30 |
申请号 |
US20000691878 |
申请日期 |
2000.10.18 |
申请人 |
SONY CORPORATION;SONY ELECTRONICS INC. |
发明人 |
WU DUANPEI;TANAKA MIYUKI;MENENDEZ-PIDAL XAVIER |
分类号 |
G10L21/02;(IPC1-7):G10L21/02 |
主分类号 |
G10L21/02 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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