Dynamic VoIP codec selection based on link attributes at call setup
US7768998B1 · kind B1 · utility
40Cited by
3References
13Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jun 13, 2005 |
| Grant date | Aug 3, 2010 |
| Priority date | — |
| Expiry date | Oct 13, 2028 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L12/66
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
A VoIP call signaling method including a codec selection mechanism that measures the effective data transmission rate and other network characteristics. In some embodiments, a proxy performs a network test between itself and both end terminals to quantify the quality of the link before notifying both of the endpoints the optimal codec they should use for a peer-to-peer call. In alternative embodiments, the proxy informs the endpoints of the network characteristics and allows the endpoints to negotiate the codec selection. The network test preferably identifies delay, bandwidth, jitter and packet loss rates.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.