Watermarking media assets at the network edge
US9058645B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | May 7, 2012 |
| Grant date | Jun 16, 2015 |
| Priority date | — |
| Expiry date | Jul 22, 2032 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N21/8358
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
Watermarking techniques are described which can be performed at network edge locations such as a Content Delivery Network (CDN) point-of-presence (POP). An edge server can identify users by request and apply a watermark based on the user to media content stored locally. Performance is improved by moving the watermarking from a central location closer to the user in terms of network proximity. An edge server can receive instructions on what type of watermark to assign and how to assign it. The edge server can use requester's identity to create and apply watermarks at the time of transferring media content to the requester. Individualized watermarking is applied to the bits transmitted to the device, the watermark indicating the specific user downloading the stream, time of transmission, etc. Watermarking can be applied throughout all of the frames of the media content rather than merely attaching it at a specific place.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.