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Patent Searching and Data


Title:
DIGITAL RIGHTS MANAGEMENT FOR CONTENT RENDERING ON PLAYBACK DEVICES
Document Type and Number:
WIPO Patent Application WO2005052901
Kind Code:
A3
Abstract:
In one embodiment, an elapsed playback time associated with a digital playback device is determined and compared to an allotted playback time for the device. In the event the elapsed and allotted playback times satisfy a predetermined relationship with respect to one another, further content playback on the device may be denied or otherwise regulated until content playback rights intrinsic to the device are renewed or "recharged".

Inventors:
HUG JOSHUA D (US)
HEFTA-GAUB BRADLEY D (US)
Application Number:
PCT/US2004/039371
Publication Date:
December 22, 2005
Filing Date:
November 22, 2004
Export Citation:
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Assignee:
REALNETWORKS INC (US)
HUG JOSHUA D (US)
HEFTA-GAUB BRADLEY D (US)
International Classes:
H04N7/173; G09G; (IPC1-7): G06F17/60
Foreign References:
US6560651B22003-05-06
US6597961B12003-07-22
US6842906B12005-01-11
US5655144A1997-08-05
US6151634A2000-11-21
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