Fingerprinting a data object
US8731235B2 · kind B2 · utility
5Cited by
1References
20Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Dec 29, 2009 |
| Grant date | May 20, 2014 |
| Priority date | — |
| Expiry date | Jun 13, 2030 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N2201/3239
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
Embodiments of the invention provide a method and a system for fingerprinting a data object at a server system and a method and a system for extracting the fingerprint from the data object at a client system. Sections of a data object are watermarked with known watermark data to create a first and a second variant of the data object, whereby the section boundaries are optionally saved as metadata. Using the metadata, the first and second variant are combined by taking sections from the variants to create a fingerprinted data object. From the fingerprinted data object, the watermark data can be extracted again.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.