Controlling access to copies of media content by a client device
US9203816B2 · kind B2 · utility
52Cited by
15References
24Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Sep 4, 2009 |
| Grant date | Dec 1, 2015 |
| Priority date | — |
| Expiry date | Sep 4, 2029 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L2209/60
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A key server for controlling access of a client device to a subset of different quality copies of media content to be delivered over a network to the client device. In one embodiment, a key server receives a request for playback permission of media content by a client device, and applies a set of one or more business rules to determine which copies of the media content, if any, can be played by the client device, and allows access to a subset of the copies that can be played back by the client device and restricts access to the copies that are not part of the subset.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.