Video stream synchronization
US10958965B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Oct 31, 2014 |
| Grant date | Mar 23, 2021 |
| Priority date | — |
| Expiry date | Oct 6, 2036 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04W72/1263
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A system clock reference is transmitted to user devices (1, 2, 3) over a short range communication channel (40) and used to calculated a clock offset. The clock offset is stored together with a user identifier in a server memory (15), from which the clock offset can be retrieved when receiving the user identifier together with a video stream (21, 22, 23) of video frames (31, 32, 33) tagged with respective timestamps. The timestamps are converted into capture times according to a system clock (17) using the retrieved clock offsets. Video streams (21, 22, 23) from multiple user devices (1, 2, 3) thereby have video frames timestamped using a same clock reference and can be time aligned.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.