Time synchronization of client devices using two-way time transfer in a live content distribution system
US10972775B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Sep 29, 2017 |
| Grant date | Apr 6, 2021 |
| Priority date | — |
| Expiry date | Sep 29, 2037 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N21/2187
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
There is provided a method in a communication network system of e.g. IP type for live distribution of media content capable of node-to-node time-transfer for synchronizing a respective local clock of an originating server and at least one client device or other server by means of two-way time transfer. The media content is sent as a data stream using unicast or multicast via respective communication links over a network. The method comprises employing a mode in which two-way time transfer is selectively provided, selectively meaning that two-way time transfer is employed such that the amount of per client specific time information being exchanged by the server and client devices is controlled, e.g. by time limiting the two-way time transfer, or during that mode reducing the occurrence of full two-way time transfer based synchronization of the client devices.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.