The Design Of The High-definition Media Player Based On ARM

The embedded system is a special system which is based on application, the hardware and software which can be cut. The system which is widely used in information appliances, wireless communication equipments, consumer electronics, mobile computing platforms, is the development of popular computer technology.With the improvement of people's quality of living, the high-definition digital television is fast becoming the major TV marketplace competitive. Attendant on the TV market in the process of display equipment also will be put forward higher requirements. The DVD, or EVD players for displaying source has been unable to meet the requirements of display counters.Interface, extensions to high-definition media player system using ARM7 family of embedded processors to 32-bit embedded EM8623 chip hardware platform, embedded real-time operating system uclinux software platform for high-definition broadcasting system.ARM (Advanced RISC Machines) is not only the processor architecture, but also the name of the company, the company's main processor architecture design, and technology licensed to other chip makers. Considering the system utility and development cost, the CPU chip we chose is EM8623 chip by the Sigma Designs designed, and we also have expanded FLASH and SDRAM memory out chip to make the code run and store it. The EM8623 chip has abundant sources in chip and peripheral interface.Although uclinux doesn't support MMU (virtual memory management unit), but retains all the characteristics of the operating system, this hardware platform provide a guarantee running. The real time operating system (RTOS) uclinux reduces the complexity of software designing, increases the real-time ability and flexibility and shortened development cycle.The high-definition media player has the ability of working reliably for long time .The system integrates multiple protocols and adopts the program synthesis of object-oriented and procedure-oriented mode and the hybrid programming of ASM,C,C++.The application of object-oriented mode makes the system more robust and expandable.ARM-based high-definition system is stable and reliable operation at the scene, achieved the expected results and actual requirements. As the external system interface rich (including common HDMI, S-Video, VGA, YPbPr, YCbCr), convenient connections and therefore has a good market value, It can be widely used in TV sales counters, cosmetics counters display, networking and other areas of advertising.