Transforming data files into logical storage units for auxiliary data through reversible watermarks
US8059815B2 · kind B2 · utility
81Cited by
19References
28Claims
0Family size
Assignee
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Key dates
| Filing date | May 8, 2003 |
| Grant date | Nov 15, 2011 |
| Priority date | — |
| Expiry date | Jan 27, 2031 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N2201/327
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A reversible watermarking program transforms a host data file into a logical storage unit for auxiliary data files by embedding the auxiliary files in the data stored in the host data file. The reversible watermark modifies host data such as an image, audio, video, or software code, to carry auxiliary data. For perceptual content such as visual or audio media, the reversible watermark can maintain a desired level of perceptual quality, effectively hiding the auxiliary data in the host data. The reversible watermark enables the original host data prior to modifications due to the embedding to be restored.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.