| 摘要 |
The present invention aims at solving the financial revenue loss due to the presence of digital video recorder that allow shipping the commercial breaks. The solution is based on a method to control the access to conditional access audio/video content comprising at least one advertisement section, said content being played on a digital video recorder associated with a security module (SM) and being formed by at least an advertisement section and a main content section, this method comprising the steps of :-defining a control information associated with the audio/video content, said control information being stored in the security module,-updating the control information in the security module with condition information included in an Control Message relating to the advertisement section of the audio/video content,-receiving by the security module of an Control Message relating to the main content section of said audio/video content and containing a condition information in relation with the stored control information,-verifying that the condition information contained in the Control Message relating to the main content section match with the stored control information, and in the positive event, returning to the digital video recorder an authorization signal allowing the access the main content section of the audio/video content. |
