Watermarking and fingerprinting digital content using alternative blocks to embed information
US7003131B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jan 31, 2003 |
| Grant date | Feb 21, 2006 |
| Priority date | — |
| Expiry date | Jul 27, 2023 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N2201/324
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A method of embedding information in digital content representing media streams. The method includes (1) selecting a set of locations within that digital content reprensenting the media stream to embed information, (2) selecting a set of possible alterations to make at those locations, and (3) making a subset of the possible alterations. The set of locations and possible alterations is herein sometimes called a “watermark.” The subset of actual alterations that are made is herein sometimes called a “fingerprint.” The method determines a set of locations at which there are alternative versions of digital content representing the same media stream, such as one being the original and one being an alternative version of the same digital content, herein sometimes called the “original movie” and the “alt-movie,” or herein sometimes called the “original block” and the “alt-block” for a particular block in the digital content representing the media stream.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.