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数字电视中条件接收系统是实现付费电视的关键所在,其关键性技术是要有加密技术的支持,加密技术在发送端包括控制字的加密和电视信号的加扰2部分,它关系到整个数字电视网络的安全性。针对加密技术在电视网络安全方面的重要性,提出了一种分段交织变换法,对系统中数字电视加扰系统进行设计,利用Modelsim对加扰系统进行仿真,最后下载至Altera公司CycloneII系列的FPGA中进行硬件验证,分析仿真结果验证了所设计的系统在性能上、加扰强度上有所提高。
Digital television conditional access system is the key to pay TV, the key technology is to have the encryption technology support encryption technology at the sending end, including the control of the encryption and television signal scrambling part 2, it relates to the entire figure TV network security. Aiming at the importance of encryption technology in TV network security, a piecewise interleaving transform method is proposed to design the digital TV scramble system in the system. Modelsim is used to simulate the scramble system and finally to Altera CycloneII series FPGA hardware verification, analysis of simulation results verify the design of the system performance, scramble increased strength.