Method and apparatus for network echo cancellation using a proportionate normalized least mean squares algorithm
US6526141B2 · kind B2 · utility
6Cited by
1References
23Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Dec 5, 2000 |
| Grant date | Feb 25, 2003 |
| Priority date | — |
| Expiry date | Dec 5, 2020 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03H2021/0063
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
The invention is a method and apparatus for performing adaptive filtering, and particularly echo cancellation, utilizing an efficient and effective adaptive algorithm. The invention is particularly useful in connection with network echo cancellation but is more broadly applicable to any situation where an adaptive estimate of a signal must be generated in real-time.The invention includes an improved proportionate normalized least mean squares algorithm for generating an impulse response estimate that is useful for generating an echo cancellation signal to be subtracted from the echo containing signal.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.