System and method for synchronizing multiple media devices
US8726061B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Aug 8, 2011 |
| Grant date | May 13, 2014 |
| Priority date | — |
| Expiry date | Aug 8, 2031 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B27/10
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
Multiple media devices are synchronized in a multi-media system having a computer system, a plurality of media devices, and a display system. Each media device to be synchronized receives a front-end synchronization signal that periodically increments a front-end counter. The front-end counter represents an unadjusted system time (UST). The media device obtains a frame of data to be displayed from a computer system. The media device also receives a back-end synchronization signal that periodically increments a back-end counter each time a frame of data is to he displayed. The back-end counter represents a media stream count (MSC). UST and MSC data are periodically transmitted to the computer system for analysis and use by a synchronization algorithm. Specifically, UST is transmitted to the computer system each time a frame of data is obtained, and a UST/MSC pair is transmitted to the computer system each time a frame of data is displayed. The computer system executes a synchronization algorithm that uses the transmitted UST and UST/MSC pair to maintain the media devices in a synchronized state.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.