Method and device for cancelling stereophonic echo with frequency domain filtering
US6738480B1 · kind B1 · utility
25Cited by
1References
24Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | May 10, 2000 |
| Grant date | May 18, 2004 |
| Priority date | — |
| Expiry date | May 10, 2020 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04R3/02
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
The filtering coefficients of a frequency domain stereophonic echo canceller are adapted by a method which takes account of the cross-correlation between the input signals relating to the two channels. In particular, the adaptation process takes account of the coherence function, reducing the problems commonly encountered with stereophonic cancellation schemes when relatively correlated input signals occur.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.