Noise suppression
US7283956B2 · kind B2 · utility
30Cited by
14References
14Claims
0Family size
Assignee
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Key dates
| Filing date | Sep 18, 2002 |
| Grant date | Oct 16, 2007 |
| Priority date | — |
| Expiry date | Feb 5, 2025 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04B1/1027
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
A method and apparatus for noise suppression is described herein. The channel gain is controlled based on a degree of variability of the background noise. The noise variability estimate is used in conjunction with a variable attenuation concept to produce a family of gain curves that are adaptively suited for a variety of combinations of long-term peak SNR and noise variability. More specifically, a measure of the variability of the background noise is used to provide an optimized threshold that reduces the occurrence of non-stationary background noise entering into the transition region of the gain curve.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.