Method for detecting speech activity
US6658380B1 · kind B1 · utility
14Cited by
13References
12Claims
0Family size
Assignee
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Key dates
| Filing date | Jun 2, 2000 |
| Grant date | Dec 2, 2003 |
| Priority date | — |
| Expiry date | Jun 2, 2020 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG10L2025/937
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A digital speech signal processed by successive frames is subjected to noise suppression taking account of estimates of the noise included in the signal, updated for each frame in a manner dependent on at least one degree of vocal activity. A priori noise suppression is applied to the speech signal of each frame on the basis of estimates of the noise obtained on processing at least one preceding frame, and the energy variations of the a priori noise-suppressed signal are analyzed to detect the degree of vocal activity of said frame.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.