Dynamically switched and static multiple video streams for a multimedia conference
US8081205B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 5, 2005 |
| Grant date | Dec 20, 2011 |
| Priority date | — |
| Expiry date | Mar 20, 2030 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04M2250/62
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
An end station for a videoconference/multimedia conference is disclosed, where the end station requests, receives and displays multiple video streams. Call control messages request video streams with specified video policies. A static policy specifies a constant source video stream, e.g., a participant. A dynamic policy dynamically maps various source streams to a requested stream and shows, for example, the current speaker, or a round robin of participants. A network access device, e.g., a media switch or a video composition system, mediates between the multi-stream end station and the core conference system. Multi-stream endpoints need not handle the complexity of directly receiving video according to a potentially wide variety of call control protocols, formats, and bit-rates. Multi-stream endpoints decentralize compositing video streams, which increases functional flexibility and reduces the need for centralized equipment.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.