Multi-carrier watermarks using carrier signals modulated with auxiliary messages
US6594373B1 · kind B1 · utility
18Cited by
8References
19Claims
0Family size
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Key dates
| Filing date | Jul 19, 2000 |
| Grant date | Jul 15, 2003 |
| Priority date | — |
| Expiry date | Nov 12, 2020 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06T2201/0083
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A watermark embedder encodes auxiliary information, such as a binary message, into a host media signal by modulating message signals with two or more corresponding carrier signals to form a watermark signal and embeds this signal into the host. A compatible watermark decoder uses the carrier signals to demodulate the message signals from the watermarked signal.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.