Mark-based content modulation and detection
US8842725B2 · kind B2 · utility
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75References
15Claims
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Key dates
| Filing date | Dec 28, 2009 |
| Grant date | Sep 23, 2014 |
| Priority date | — |
| Expiry date | Jun 10, 2031 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N21/8358
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A method for modulating mark (20) within content signal (18) that has frames, where each of the frames has content lines and one or more measurable parameters, where each of the content lines has pixels, and where each of the pixels has a value, the method comprising selecting framesets from among the frames of the content signal; modulating at least two of the framesets; and causing mark (20) to be present within content signal (18) by at least modulating at least two of the framesets.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.