Extraction of embedded watermarks from a host content using a plurality of tentative watermarks
US8923548B2 · kind B2 · utility
45Cited by
377References
20Claims
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Key dates
| Filing date | Nov 3, 2011 |
| Grant date | Dec 30, 2014 |
| Priority date | — |
| Expiry date | Feb 8, 2033 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06T2201/0065
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
Methods, devices and computer program products facilitate the extraction of embedded watermarks in the presence of content distortions. Distortion of the content is estimated using two or more detected watermarks with an associated probability of false detection that is above a desired level. The estimated content distortion is used to obtain pre-distorted synchronization templates and to reevaluate the detected watermarks. The use of pre-distorted synchronization templates results in obtaining better estimations of content distortion, and improved reliability of watermark detections.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.