Fast channel change
US7562375B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Oct 10, 2003 |
| Grant date | Jul 14, 2009 |
| Priority date | — |
| Expiry date | Mar 22, 2026 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N21/6581
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
In an exemplary server implementation, a server is configured to retain at least one independent frame for each video channel of multiple video channels that are being distributed using multicast communications and is adapted to respond to channel change requests from clients by transmitting the retained at least one independent frame of a requested video channel to a requesting client using a unicast communication. In an exemplary method implementation, a method for fast channel changing in a multicast video distribution architecture includes: detecting a channel change request that indicates a requested channel, the requested channel corresponding to a multicast group; and transmitting a retained intra frame for the requested channel as a unicast communication.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.