Adaptive speech recognition method with noise compensation
US6662160B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Oct 26, 2000 |
| Grant date | Dec 9, 2003 |
| Priority date | — |
| Expiry date | Oct 27, 2021 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG10L15/20
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
An adaptive speech recognition method with noise compensation is disclosed. In speech recognition, optimal equalization factors for feature vectors of a plurality of speech frames corresponding to each probability density function in a speech model are determined based on the plurality of speech frames of the input speech and the speech model. The parameters of the speech model are adapted by the optimal equalization factor and a bias compensation vector, which is corresponding to and retrieved by the optimal equalization factor. The optimal equalization factor is provided to adjust a distance of the mean vector in the speech model. The bias compensation vector is provided to adjust a direction change of the mean vector in the speech model.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.