Conditional Access （CA） System is the essential basis of a Pay-TV System to charge the subscribers. This paper first introduces the standards and mechanisms for a Set-Top-Box（STB）to receive programs scrambled by d...Conditional Access （CA） System is the essential basis of a Pay-TV System to charge the subscribers. This paper first introduces the standards and mechanisms for a Set-Top-Box（STB）to receive programs scrambled by different CA systems. Then, according to DVB multicrypt solution, a design in detail for such a DVB receiver, I.e. STB is presented. Decoder manufacturers provide STBs with the standard DVB common interface and CA system providers provide detachable CA modules to plug into the STBs through Common Interface. This solution allows broadcasters and customers to change CA system without replacing the STB. Such a design has been implemented in a decoder based on LSI SC2000, and is proved to be an open and secure solution for conditional access.展开更多
文摘Conditional Access （CA） System is the essential basis of a Pay-TV System to charge the subscribers. This paper first introduces the standards and mechanisms for a Set-Top-Box（STB）to receive programs scrambled by different CA systems. Then, according to DVB multicrypt solution, a design in detail for such a DVB receiver, I.e. STB is presented. Decoder manufacturers provide STBs with the standard DVB common interface and CA system providers provide detachable CA modules to plug into the STBs through Common Interface. This solution allows broadcasters and customers to change CA system without replacing the STB. Such a design has been implemented in a decoder based on LSI SC2000, and is proved to be an open and secure solution for conditional access.
