Modifying material
US7110566B2 · kind B2 · utility
11Cited by
8References
82Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Dec 6, 2001 |
| Grant date | Sep 19, 2006 |
| Priority date | — |
| Expiry date | Sep 7, 2024 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06T2201/0083
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
Material is represented by transform coefficients represented by digital numbers. A method of perceptibly watermarking the material comprises the steps of: changing representations of the said numbers according to an invertible algorithm without changing the number of bits in the said numbers; and encoding the changed n bit numbers to effect compression encoding of the material.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.