Timestamp quality assessment for assuring acoustic echo canceller operability
US8369251B2 · kind B2 · utility
1Cited by
48References
20Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jun 20, 2008 |
| Grant date | Feb 5, 2013 |
| Priority date | — |
| Expiry date | Mar 7, 2031 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04M9/082
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
A voice communication end device provides echo reduction when operating in a full duplex mode using acoustic echo cancellation, which includes periodic audio queue adjustments to account for drift. The end device performs a quality assessment by calculating consistency statistics for the queue adjustments to determine whether acoustic echo cancellation would be ineffective, and if so falls back to a half duplex mode using voice switching.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.