Design And Implement Of T-DMB Player Based On SH7363

The conventional static video service is hard to satisfy customer's requirement for media information diversity, as the establishment and improvement of the global mobile digital TV broadcasting network, cell phone TV and DMB(Digital Multimedia Broadcasting) product will be coming soon later.In 2005, the T-DMB(Terrestrial Digital Multimedia Broadcasting) standard which facing to terrestrial users in Korea has been implemented, the T-DMB broadcasting frequency range is divided to L-BAND(1452MHz～1492MHz) and BAND-III(174MHz～245MHz). Now in Beijing,Shanghai and Guangdong provinces the digital channels based on T-DMB standard is starting, and the Shanghai Oriental Pearl television tower has broadcasted different channels based on T-DMB(L-BAND) since 2007, it also prepare actively for 2008 Olympic Games digital encryption channels.In this paper, the T-DMB transport system is researched, and one kind of T-DMB receiving system scheme is also designed, then the Irdeto CAS profile is resolved and the program decoder flow for T-DMB full channels is proposed in it. The designed player supports the channels in the L-BAND and BAND-III frequency range, it can search the programs automatically in T-DMB area, and it's successfully to realize encryption programs playing based on Irdeto CAS in Shanghai. This T-DMB player can reach -95dBm sensitivity in L-BAND ignoring whether the antenna match network is optimum, and the program video is fluent and clear.The system hardware platform can be divided by two parts: RF signal receiving module and base band performance circuit. The RF signal receiving module includes T-DMB antennas front end RF module and CA smart card; the base band circuit includes SH7363 processors power circuits 3.2 inch TFT-LCD with resistance touch panel,Mini-SD card interface,USB2.0 interface,CODEC with stereo headphone and speaker amplifiers memory IC, etc. The device power is from Li Polymer battery and it can be charged by AC adaptor or USB(VBUS) power. The system software implement is also can be divided as TS with MPEG-4 information decoder and base band performance driver development. The base band performance driver development and SH7363 main program transplant are based on Japanese T-Kernel embedded OS, and TS program decoder including encryption channel is the core part for system software performance development.At present, the mobile digital TV standard in China hasn't unified and implement yet, but the T-DMB player in this paper discussed has accomplished channel searching and decoder under the T-DMB standard successfully, and gained the good playing performance, so it may can be referred by DMB player scheme based on Chinese standard later.