Unique watermarking of content objects according to end user identity
US8806558B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 18, 2013 |
| Grant date | Aug 12, 2014 |
| Priority date | — |
| Expiry date | Dec 18, 2033 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L2209/608
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A machine-implementable method for uniquely watermarking a content object according to end user identity includes transcoding an original content object to a format that is compatible with end user systems, and storing the transcoded content object where it is accessible by one or more points of presence (POPs) of a content delivery network. One of the POPs receives identifying information associated with a specific one of the end user systems. A digital watermark engine adds uncorrected digital watermark information correlating to the end user system, to the content object, to form a uniquely watermarked content object. The uncorrected digital watermark information is correctable by error correction capability of the specific end user system to deliver a version of the content object that is indistinguishable by a human from the original content object. The method further includes transmitting the uniquely watermarked content object to the specific end user system.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.