Patent · US Active

System and method for using DRM to control conditional access to broadband digital content

US7698568B2 · kind B2 · utility

1Cited by

2References

15Claims

0Family size

Assignee

Nokia · FI

Inventors

Jukka Alve · Helsinki, FI
Ari Ikonen · Raisio, FI
Mauri Kangas · Paimio, FI
Tapani Heikkila · Espoo, FI

Key dates

Filing date	Sep 9, 2004
Grant date	Apr 13, 2010
Priority date	—
Expiry date	Jun 18, 2027

Classification

Technology area (CPC H)Electricity
CPC primaryH04N21/8355
WIPO fieldAudio-visual technology
WIPO sectorElectrical engineering

Abstract

A system and method is disclosed for providing DRM in a broadcast environment. In accordance with the embodiment, a DRM system distributes encrypted service keys over the mobile telephone network to a mobile terminal. The mobile terminal receives the encrypted service key and uses it to decrypt encrypted content keys received from a DVB set top box. The decrypted content keys are sent to the set box over local link where they are used to decrypt encrypted broadcast content. A power management technique for mobile receivers is also disclosed that enables the receiver hardware to power off during a portion of the rendering process.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.