Wireless coordination of audio playback
US10846048B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Feb 3, 2019 |
| Grant date | Nov 24, 2020 |
| Priority date | — |
| Expiry date | Feb 3, 2039 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04R2420/07
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
An electronic device that coordinates a playback operation is described. In particular, an interface circuit in the electronic device may calculate, based on differences between transmit times when packets were transmitted by a second electronic device and receive times of the packets, relative drift as a function of time between a clock in the interface circuit and a second clock in the second electronic device. Then, the interface circuit may adjust, based on the relative drift, a clock circuit that provides the clock to eliminate the relative drift, and may determine a remaining time offset between the clock and the second clock. Next, the interface circuit may modify a future time when the electronic device is to perform the playback operation based on the remaining time offset to determine a corrected future time, and the electronic device may perform the playback operation at the corrected future time.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.