Echo processing devices for single-channel or multichannel communication systems
US7403608B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jun 18, 2003 |
| Grant date | Jul 22, 2008 |
| Priority date | — |
| Expiry date | Feb 18, 2024 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04M9/082
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
An echo processing technique for attenuating echo components of a direct signal X1n in a return signal Y2n. A receive gain Grn and a send gain Gen are calculated. The receive gain Grn is applied to the direct signal and an input signal X2n is produced and emitted into an echo generator system. The send gain Gen is applied to an output signal Y1n from the echo generator system and the return signal Y2n is produced. A coupling variable COR is calculated which is characteristic of the acoustic coupling between the direct signal X1n or the input signal X2n and the output signal Y1n. The receive gain Grn and the send gain Gen are calculated on the basis of the coupling variable.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.