Digital watermarking
US5915027A · kind A · utility
618Cited by
11References
28Claims
0Family size
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Key dates
| Filing date | Nov 5, 1996 |
| Grant date | Jun 22, 1999 |
| Priority date | — |
| Expiry date | Nov 5, 2016 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N2201/3284
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
Digital watermarking of data, including image, video and audio data, is performed by repeatedly inserting the watermark into subregions or subimages of the data. Similarly, the watermark is repeatedly extracted from the subregions of the data.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.