Adaptive speech filter
US5768473A · kind A · utility
58Cited by
13References
16Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jan 30, 1995 |
| Grant date | Jun 16, 1998 |
| Priority date | — |
| Expiry date | Jan 30, 2015 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04R2225/43
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
This invention relates to an improved adaptive spectral estimator for estimating the spectral components in a signal containing both an information signal, such as speech and noise. The improvements relate to a noise power estimator and a computationally efficient gain calculation method. The adaptive spectral estimator is particularly suited to implementation using digital signal processing and can be used to provide improved spectral estimates of the information signal. It can be combined with a speech or voice recognition system. A further object of the invention is to provide an accurate method for voice detection.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.