System and method for enhanced stereo audio
US7477735B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 22, 2004 |
| Grant date | Jan 13, 2009 |
| Priority date | — |
| Expiry date | Sep 7, 2026 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04M9/08
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
An audio communication system and method with improved acoustic characteristics features a stereo detector that is introduced in the echo canceller of the system. When stereo in far-end audio is detected, converging of the adaptive mono model of the canceller is suspended, and when stereo in far-end audio is not detected, converging of the adaptive stereo model of the canceller is suspended. The system may also be extended with a miscellaneous processing unit configured to attenuate the signal at certain events implying a large stereo echo contribution. A stereo collapsing unit is also introduced on the channels of the far-end audio to remove the stereo image at certain events to further suppress the echo contribution.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.