A method of providing conditional access to a content item, which content item is protected by a particular security mechanism, comprising providing unconditional access to a sample content item (105) protected by the same particular security mechanism. The sample content item (105) could be e.g. a trailer for the content item (104). Preferably the protected content item (104) is formatted using a particular formatting scheme like MPEG-2, and the sample content item (105) is formatted using the same formatting scheme. If acquisition of rights by a client (120) is necessary for playback of the content item (104), this is preferably refused until the sample content item (105) has been accessed by said client (120).
申请公布号
WO03088673(A1)
申请公布日期
2003.10.23
申请号
WO2003IB01313
申请日期
2003.04.01
申请人
KONINKLIJKE PHILIPS ELECTRONICS N.V.;VAN DEN HEUVEL, SEBASTIAAN, A., F., A.;KAMPERMAN, FRANCISCUS, L., A., J.
发明人
VAN DEN HEUVEL, SEBASTIAAN, A., F., A.;KAMPERMAN, FRANCISCUS, L., A., J.