Apparatus for a digital echo canceller and method therefor
US6804204B2 · kind B2 · utility
2Cited by
5References
8Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Mar 22, 2001 |
| Grant date | Oct 12, 2004 |
| Priority date | — |
| Expiry date | May 27, 2023 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04B3/23
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
An apparatus of a digital echo canceller and method therefor, a designed selector is used values of receiving and input signals to estimate the length of a cable. The response values of an insignificant part of the echo signal can be selected. Multiplication and addition operations are carried out in a response region of a significant part of the echo signal. An estimated echo signal is produced to cancel the echo signal, unnecessary operations and the cost of a hardware can be reduced.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.