Application-level routing protocol for multiparty audio-video conferencing
US8243630B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Oct 19, 2005 |
| Grant date | Aug 14, 2012 |
| Priority date | — |
| Expiry date | Oct 3, 2029 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L12/1854
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
Systems and methods are described for implementing an application-level routing protocol for multiparty audio-video conferencing. In one implementation, application-level per-stream routing techniques separately control audio data and video data between conference members hosted on a network. Different audio application-level multicast (ALM) trees are generated by each member, are dynamically updated according to shortest-path-first selection of data delivery paths, and are used to send audio data to the other members of the videoconference. Likewise, different video ALM trees are generated by each member, are dynamically updated according to broadest-path-first selection of data delivery paths, and are used to send video data to the other members of the videoconference. Separate audio and video ALM trees for each member can utilize IP multicast in segments of the network in which IP multicast is enabled.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.