Bluetooth media device time synchronization
US10009862B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Sep 6, 2017 |
| Grant date | Jun 26, 2018 |
| Priority date | — |
| Expiry date | Sep 6, 2037 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04R2420/07
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
Synchronized media streaming in a device chain including first, second and third Bluetooth media device having a controller and time synchronization algorithm. The first device formats a first media packet including received media data, second device address, and synchronization information including packet start time including a delay time and cumulative clock drift counted thus far. The second device receives the first packet and formats a second packet including the media data, third device address, updated synchronization information including the second packet's play start time, local clock time, clock drift, and a cumulative clock drift counted thus far. The second device transmits the second packet to the third device. The synchronization algorithms begin synchronized playing of the media data including the first device playing after the delay time, second device playing after the first packet's play start time, and the third device playing after the second packet's play start time.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.