Robust noise suppression system in adverse echo conditions
US9343073B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Aug 20, 2010 |
| Grant date | May 17, 2016 |
| Priority date | — |
| Expiry date | Aug 5, 2032 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04M9/082
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
The present technology provides adaptive noise and echo reduction of an acoustic signal which can overcome or substantially alleviate problems associated with mistaken adaptation of speech and noise models to acoustic echo. The present technology carries out a multi-faceted analysis to identify echo within the near-end acoustic signal to derive an echo model. Echo classification information regarding the derived echo model is then utilized to build near-end speech and noise models. These echo, speech, and noise models are then used to generate one or more signal modifications applied to the acoustic signal to preserve the desired near-end speech signal and reduce the echo and near-end noise signals. By building near-end speech and noise models utilizing echo classification information, the present technology can prevent adaptation of the speech and noise model to the acoustic echo.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.