| 摘要 |
In a method and a device for synchronizing the display of video data on different display devices, a source device provides the same video data stream to the display devices through a communication network. One of the display devices (first display screen device) is provided with picture acquisition (camera) capabilities. By taking a distant picture of the second device display and comparing it with the local picture being displayed at the same (acquisition) moment or time on the first display, these images may be localized within a sequence. The time drift between the two different displays may be determined, allowing a command to modify a display timer to be provided to the source device or display itself. Precision may be improved by iterating the process with dichotomous delay applied to at least one display. Drift determination using local and distant (other display captured) images may comprise determining distance (in terms of pictures / frames) between points of interest (POI) in respective pictures; POIs may be successive predefined patterns. The first display may be the image content source, providing a form of screen mirroring between portable devices, such as tablets and mobiles, and large screen TVs or projectors. |
