Migration method compatible with multiple conditional access (CA) systems and CA method

Abstract

The invention discloses a migration method compatible with multiple conditional access (CA) systems and a CA method. The migration method comprises the following steps of: installing multiple CA systems in a set top box program, setting a general interface function according to the functions of interfaces to be migrated of all CA systems and providing the general interface function to a set top box application program; judging the type of a CA system to which the current smart card belongs and calling the general interface function to initialize a module which is required to be used by a CA system which corresponds to the current smart card; and setting a general data structure, converting data output by different CA systems into a general data structure and providing the general data structure to the set top box application program. By the migration method, the migration compatibility of a CA system can be enhanced, software development flow of a set top box end is simplified, and cross-platform migration speed is increased.

Description

Compatible with multiple conditional access system porting methods and conditional access methods technical field The invention relates to computer technology, in particular to a method and a conditional access method capable of transplanting compatible multiple conditional access systems, and belongs to the technical field of digital television. Background technique The conditional access (CA) system is used to digitally scramble and encrypt the content of digital TV programs to establish an effective charging system. It is called the technical guarantee system for the healthy development of digital TV. At the front end, the CA system mainly completes the acquisition, generation, encryption, and transmission of user authorization control messages (ECM) and user authorization management messages (EMM); at the receiving end, it receives and processes the ECM and EMM information sent by the front-end CA system, and decodes them. Output the control word (CW), and descramble t...

AI Technical Summary

Problems solved by technology

When transplanting a CA system in a set-top box, it is necessary to perform corresponding transplantation according to the transplantation documents of each CA system. Each CA system corresponds to a set of set-top box application software. Therefore, only one CA system can be implemented in a set-top box.

Moreover, if you want to implement the CA system of another manufacturer in the set-top box of the same platform, or implement the CA system of the same manufacturer in the set-top boxes of different platforms, due to the inconsistency of the underlying functions, it cannot be directly transplanted, and a set of applications needs to be redevelo

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