Method and filter for enhancing a noisy speech signal
US5148488A · kind A · utility
30Cited by
7References
9Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Nov 17, 1989 |
| Grant date | Sep 15, 1992 |
| Priority date | — |
| Expiry date | Nov 17, 2009 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG10L21/0208
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A filter for filtering a speech signal to reduce acoustic noise is disclosed. In accordance with the inventive filter, the parameters of an all-pole vocal tract model are first estimated from the noisy signal using a least mean square algorithm as if no noise were present, and then the speech signal is filtered using an approximate limiting Kalman filter constructed according to the estimated parameters.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.