Method and apparatus for constructing a speech filter using estimates of clean speech and noise
US7725314B2 · kind B2 · utility
16Cited by
22References
4Claims
0Family size
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Key dates
| Filing date | Feb 16, 2004 |
| Grant date | May 25, 2010 |
| Priority date | — |
| Expiry date | Nov 29, 2027 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG10L21/0208
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A method and apparatus identify a clean speech signal from a noisy speech signal. To do this, a clean speech value and a noise value are estimated from the noisy speech signal. The clean speech value and the noise value are then used to define a gain on a filter. The noisy speech signal is applied to the filter to produce the clean speech signal. Under some embodiments, the noise value and the clean speech value are used in both the numerator and the denominator of the filter gain, with the numerator being guaranteed to be positive.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.