System and method for synchronizing operations among a plurality of independently clocked digital data processing devices
US8234395B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Apr 1, 2004 |
| Grant date | Jul 31, 2012 |
| Priority date | — |
| Expiry date | Mar 5, 2026 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04R2227/005
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A system maintains synchrony of operations among devices that have independent clocking arrangements. The system includes a task distribution device that distributes tasks to a synchrony group of devices that perform the tasks distributed by the task distribution device in synchrony. The task distribution device distributes each task to the members of the synchrony group over a network. Each task is associated with a time stamp that indicates a time, relative to a clock maintained by the task distribution device, at which the members of the synchrony group are to execute the task. Each member of the synchrony group periodically obtains an indication of the current time indicated by its clock, determines a time differential between the task distribution device's clock and its respective clock and determines a time at which, according to its respective clock, the time stamp indicates that it is to execute the task.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.