Scalable, error resilient DRM for scalable media
US7313814B2 · kind B2 · utility
23Cited by
7References
63Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Apr 1, 2003 |
| Grant date | Dec 25, 2007 |
| Priority date | — |
| Expiry date | Jul 3, 2025 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L2209/603
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
An exemplary digital rights management engine and related methods divides multimedia content into service level layers, encrypts at least some of the layers, and offers access to the encrypted layers by permission. The multimedia content may be layered using multiple different layering approaches simultaneously, and access to the different types of layers may be offered simultaneously. One of the layers may be left unencrypted to allow free browsing of a low quality service level. An exemplary system of key management for digital rights management is also disclosed.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.