Noise suppression device including subband-based signal-to-noise ratio
US7349841B2 · kind B2 · utility
14Cited by
6References
10Claims
0Family size
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Key dates
| Filing date | Mar 28, 2001 |
| Grant date | Mar 25, 2008 |
| Priority date | — |
| Expiry date | Oct 28, 2022 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG10L21/0208
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A noise suppression device calculates a subband SN ratio calculation based on a noise likeness signal, an input signal spectrum and a subband-based estimated noise spectrum. The device calculates a subband-based input signal average spectrum, calculates a subband-based mixture ratio of the subband-based estimated noise spectrum to the subband-based input signal average spectrum on the basis of the noise likeness signal, and calculates the subband-based SN ratio on the basis of the subband-based estimated noise spectrum, the subband-based input signal average spectrum and the mixture ratio.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.