Data processing apparatus and method
US7284129B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 12, 2002 |
| Grant date | Oct 16, 2007 |
| Priority date | — |
| Expiry date | Jan 3, 2025 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N2201/327
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A watermarking system includes an encoding data processor operable to generate at least one marked version of an original item of material by introducing one of a predetermined set of code words into a copy of the original material item. The apparatus has a code word generator operable to provide the code word having a plurality of code word coefficients, and an encoding processor operable to combine the code word coefficients with the material. Each of the plurality of code words of the set is uniquely associated with a data word having first and second fields. Each of a set of values of the first field is represented as a first part of the code word having a first plurality of coefficients, and the second field is represented as a second part of the code word having a second plurality of coefficients.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.