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:
Apr. 13, 2004
Filed:
Apr. 05, 2001
Peter George Van de Haar, Eindhoven, NL;
Koninklijke Philips Electronics N.V., Eindhoven, NL;
Abstract
Conditional access system for controlling the access of receivers of end-users to a data content source in an uplink system. Said uplink system comprises a scrambler for scrambling data content supplied from the data content source, an entitlement control message generator for generating entitlement control messages containing a control word and an entitlement identification and a transmitter for transmitting the scrambled data content and the entitlement control messages. A descrambler and an entitlement control message decoder are associated to the receiver. If a match between the entitlement in the entitlement control message and the entitlement of the end-user exists, the entitlement control message decoder supplies a control word to the descrambler for descrambling a part of the received scrambled content for which the receiver is entitled. A separator is coupled to the data content source for separating a part of the data content from said source into at least one object data stream representing a preselected object of the data content part and a remaining data stream representing the data content part without the object data. The at least one object data stream is supplied to the input of the scrambler. A combiner is connected to the output of the descrambler for combining the descrambled object data with the remaining data content. An individual entitlement is allocated to said object.