Method and apparatus for identifying noise environments from noisy signals
US7266494B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Nov 10, 2004 |
| Grant date | Sep 4, 2007 |
| Priority date | — |
| Expiry date | Dec 23, 2025 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG10L21/0216
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A method and apparatus are provided for identifying a noise environment for a frame of an input signal based on at least one feature for that frame. To identify the noise environment, a probability for a noise environment is determined by applying the noisy input feature vector to a distribution of noisy training feature vectors. In one embodiment, each noisy training feature vector in the distribution is formed by modifying a set of clean training feature vectors. In one embodiment, the probabilities of the noise environments for past frames are included in the identification of an environment for a current frame. In one embodiment, a correction vector is then selected based on the identified noise environment.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.