Method and apparatus for infinite return loss handler for network echo canceller
US6694019B1 · kind B1 · utility
14Cited by
15References
17Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Aug 26, 1999 |
| Grant date | Feb 17, 2004 |
| Priority date | — |
| Expiry date | Aug 26, 2019 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04B3/234
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
A communication device and method for detecting an infinite return loss (IRL) condition and temporarily halting or bypassing operations of an echo canceller in response to detecting that condition. The echo canceller includes an IRL detection module that analyzes the echo return loss and the echo return loss enhancement measured from the far-end and near-end signals. Based on the analysis, the IRL detection module determines whether to bypass the subtraction of the estimated echo in the outgoing near-end signal or continue normal operations.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.