System reactions to the detection of embedded watermarks in a digital host content
US8280103B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Nov 19, 2010 |
| Grant date | Oct 2, 2012 |
| Priority date | — |
| Expiry date | Dec 10, 2030 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N2201/323
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
Methods, devices and computer program products for enabling secure and efficient extraction of embedded watermarks from digital host content are provided. Upon the reception of a multi-channel digital host content with embedded watermarks, a subset of the received channels are selected and combined together to form a composite content. The composite content is then examined to recover embedded watermarks. The particular subset of channels can be selected according to a probability value. Further, a set of new channels can be selected and combined after a particular time interval has elapsed. The number of selected channels can also be varied each time a new selection is made.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.