| With the fast development of telecommunication, mobile TV becomes the hottest topic in telecommunication industry in China. In the past three years, Global mobile network operators put out various kinds of mobile TV services based on their own 2.5G/3G networks. Chinese mobile network operators also dedicated to several applications of mobile TV, the competition of the mobile TV standards is fierce. But the development of mobile TV is still in market-orientation period in China, the national standard needs to unify yet.CMMB (China Mobile Multimedia Broadcasting) is the first independent developing mobile terminal system which orientates the mobile phone,PDA,MP3,MP4,digital camera,notebook PC, etc. The technology summit meeting of CMMB hold in last December showed that the commercial industrial chain of CMMB had taken shape. State Administration of Radio Film and Television has promised that they will provide a quite amount of CMMB terminal for watching freely to some special peoples during the Olympic Games.As the later service of mobile TV, it needs to realize payment system. This essay provides a payment system of CMMB, it uses the SD card interface standard, Linux programming technology at S3C2410 platform, and AES algorithm, to encode the encrypted video & audio data of CMMB. At the same time, as the analysing & encrypting of CMMB signal executes in intelligent card encapsulated in SD, this system has strong compatibility. |
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