Double-talk detector
US6570986B1 · kind B1 · utility
15Cited by
13References
13Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Aug 30, 1999 |
| Grant date | May 27, 2003 |
| Priority date | — |
| Expiry date | Aug 30, 2019 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04M9/082
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
A communication system includes an echo canceller and double-talk detector. The echo canceller includes an adaptive finite impulse response filter that generates an adaptive filter weight vector. The double talk detector computes a squared norm of the filter weight vector and detects an increase of the squared norm in order to detect double-talk status. Upon detection of double-talk status, operation of the echo canceller is suspended.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.