Switching a client from unicasting to multicasting by simultaneously providing unicast and multicast streams to the client
US8140699B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Feb 23, 2006 |
| Grant date | Mar 20, 2012 |
| Priority date | — |
| Expiry date | Dec 18, 2028 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB32B2451/00
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
Switching a client from unicasting back to multicasting involves simultaneously providing the digital video content to the client via unicasting and multicasting until the client has buffered duplicate frames (i.e., frames that contain the same digital video content). Once the client has buffered duplicate frames, the client can transition from playing out of a buffer that holds frames received via unicasting to playing out of a buffer that holds frames received via multicasting without skipping a frame. Once the transition back to multicasting is complete, unicasting is terminated and any frames remaining in the unicast buffer are flushed.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.