The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Aug. 27, 2013
Filed:
Jun. 01, 2010
Steeve Huin, Hoofddorp, NL;
Steeve Huin, Hoofddorp, NL;
Irdeto B.V., , NL;
Abstract
The invention provides a method and a system for allowing access to a digital broadcast stream on a client device in a conditional access system, wherein the start time and end time of events in the broadcast stream are predefined. If entitled, a server system transmits for an even the start time and end time to the client device. As long as the current time, which is also transmitted from the server system to the client device, is within the range from the start time to the end time, the client device is allowed to decrypt the broadcast stream. To allow events to extend in time without requiring the generation of a new end time, the start time and end time on the one hand and the current time on the other hand are defined on different timescales.