Overlay-based watermarking for video synchronization with contextual data
US9299119B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Feb 24, 2014 |
| Grant date | Mar 29, 2016 |
| Priority date | — |
| Expiry date | Feb 24, 2034 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG09G2340/125
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
Systems and methods for synchronizing a broadcast video with contextual data are disclosed, wherein the broadcast video is enhanced by graphical overlays. Synchronization is achieved by means of digital watermarking of the broadcast video in conjunction with the graphical-overlays. Exemplary embodiments embed a watermark bitstream into the broadcast video based on an overlay-template, characteristic of a corresponding overlay-graphic. The watermarked video is then transmitted over a communication link to a receiving-end including a detector. According to some embodiment, the embedder inserts the watermark bitstream into the overlay-graphics' regions of the video and the detector extracts the watermark bitstream based on information in the overlay-template and based on a restored version of the original overlay-graphics.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.