Integrated echo cancellation and noise suppression
US8811601B2 · kind B2 · utility
36Cited by
2References
40Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Apr 4, 2011 |
| Grant date | Aug 19, 2014 |
| Priority date | — |
| Expiry date | Feb 5, 2033 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG10L2021/02166
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A method for echo cancellation and noise suppression is disclosed. Linear echo cancellation (LEC) is performed for a primary microphone channel on an entire frequency band or in a range of frequencies where echo is audible. LEC is performed on one or more secondary microphone channels only on a lower frequency range over which spatial processing is effective. The microphone channels are spatially processed over the lower frequency range after LEC. Non-linear noise suppression post-processing is performed on the entire frequency band. Echo post-processing is performed on the entire frequency band.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.