Subband echo location and double-talk detection in communication systems
US7003101B2 · kind B2 · utility
7Cited by
9References
11Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Aug 23, 2002 |
| Grant date | Feb 21, 2006 |
| Priority date | — |
| Expiry date | Aug 23, 2022 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04B3/23
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
A method of controlling an echo canceller in a communications channel, is disclosed wherein input signals from the communications channel are first subbanded into a subband. Echo locations are then identified within the subband and are used to control the echo canceller. Typically, the echo canceller will be a fullband echo canceller with an adaptive filter, in which case the echo locations are used to control the filter coefficients.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.