Method and apparatus for automatic switching of multicast/unicast live TV streaming in a TV-over-IP environment
US7472197B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Oct 31, 2005 |
| Grant date | Dec 30, 2008 |
| Priority date | — |
| Expiry date | Aug 1, 2026 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L65/765
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
A system for live TV transmission over IP networks incorporates a content encoder receiving live TV broadcast and converting to RTP packets for multicast streaming. A streaming server receives the multicast RTP packets from the content encoder and converts the multicast stream to a unicast stream. The streaming server is also responsive to RTSP commands for trick mode operation. A settop box is connected through an IP network for receiving multicast RTP packets from the content encoder and generating RTSP commands for trick mode operation, the setup box issuing a leave multicast group signal upon issuing a trick mode command and receiving unicast transmission of RTP packets from the streaming server controllable by the trick mode commands.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.