介绍了不需要借助无线POS(point of sells),不需要认证卡,也不需要客户端装置,只要通过普通的手机以及一张空中写号专属卡,即在普通SIM卡通信模块基础上增加空中写号代办模块,就可以实现空中选号、空中写卡的方法。可以解决空中写卡成...介绍了不需要借助无线POS(point of sells),不需要认证卡,也不需要客户端装置,只要通过普通的手机以及一张空中写号专属卡,即在普通SIM卡通信模块基础上增加空中写号代办模块,就可以实现空中选号、空中写卡的方法。可以解决空中写卡成本过高、不便于推广的问题。展开更多
Security video communication is a challenging task,especially for wireless video applications.An efficient security multimedia system on embedded platform is designed.By analyzing the hardware architecture and resourc...Security video communication is a challenging task,especially for wireless video applications.An efficient security multimedia system on embedded platform is designed.By analyzing the hardware architecture and resource,the efficient DSP-based H.264/AVC coding is studied by efficient video coding techniques and system optimizing implementation.To protect the confidentiality and integrity of media information,a novel security mechanism is presented,which includes user identify authentication and a perceptual video encryption algorithm based on exploiting the special feature of entropy coding in H.264.Experimental results show that the proposed hardware framework has high performance and achieves a better balance between security and efficiency.The proposed security mechanism can achieve high security and low complexity cost,and has a little effect on the compression ratio and transmission bandwidth.What’s more,encoding and encryption at the same time,the performance of data process can meet real-time application.展开更多
基金supported by the Project (No.2005CB321902) of Major State Basic Research Development (973)Project (No.yzdj0705) of Information Security Key Laboratory of the General Office of CPC Central Committee of China
文摘Security video communication is a challenging task,especially for wireless video applications.An efficient security multimedia system on embedded platform is designed.By analyzing the hardware architecture and resource,the efficient DSP-based H.264/AVC coding is studied by efficient video coding techniques and system optimizing implementation.To protect the confidentiality and integrity of media information,a novel security mechanism is presented,which includes user identify authentication and a perceptual video encryption algorithm based on exploiting the special feature of entropy coding in H.264.Experimental results show that the proposed hardware framework has high performance and achieves a better balance between security and efficiency.The proposed security mechanism can achieve high security and low complexity cost,and has a little effect on the compression ratio and transmission bandwidth.What’s more,encoding and encryption at the same time,the performance of data process can meet real-time application.
