SYSTEM FOR CONTROLLING CONDITIONAL ACCESS SYSTEMS AND METHOD FOR CONTROLLING CONDITIONAL ACCESS SYSTEMS

摘要

In a system for controlling conditional access systems (143, 145, 147, 149) in a digital television decoder comprising a signal processing block with a decoder descrambler and a conditional access block with at least one conditional access system, each conditional access system (143, 145, 147, 149) is provided with a client (142, 144, 146, 148) supporting communication via a client interface (152). Furthermore, the conditional access block (141) is provided with a conditional access client manager (151), which handles communication with conditional access systems (143, 145, 147, 149) via the clients (142, 144, 146, 148) using a client interface (152) and controls descrambling of signal in the decoder by selecting a conditional access system (143, 145, 147, 149) responsible for descrambling a currently received signal and configuring the decoder descrambler (132) depending on the selected conditional access system (143, 145, 147, 149).