Audio synchronization among playback devices using offset information
US9313591B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Jan 27, 2014 |
| Grant date | Apr 12, 2016 |
| Priority date | — |
| Expiry date | Jun 26, 2034 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04R2227/005
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
Embodiments are provided for audio synchronization of one or more playback devices using offset information. A playback device may join a synchrony group upon a command, where the synchrony group may have a group coordinator that provides timing information for the group. In one case, the playback device may retrieve offset information from memory storage, where the information represents the offset between a clock of the playback device and the clock of the group coordinator. In another case, the playback device may determine that the offset information is not available in storage and as a result, the offset information may be computed. In one instance, the offset information may be computed using other offsets obtained from storage, such as offsets between other devices in the synchrony group. In another instance, the offset information may be computed using SNTP polling.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.