Doubletalk detection by means of spectral content
US5732134A · kind A · utility
29Cited by
8References
11Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Jan 15, 1997 |
| Grant date | Mar 24, 1998 |
| Priority date | — |
| Expiry date | Jan 15, 2017 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04B3/234
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
A method and apparatus are described for detecting doubletalk in an acoustic echo canceller. The present invention examines the spectral characteristic of the near-end audio signal and the spectral characteristics of the far-end audio signal and determines from the comparison if a condition of doubletalk exists. An exemplary implementaion of the present invention is presented in an acoustic echo canceller wherein the adaptation of the adaptive filter taps is inhibited during periods of doubletalk.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.