The Design And Realization On Embedded High Definition Movie Player System

High-definition movies can provide people a much clearer image quality and more advanced audio-visual enjoyment, therefore has became the research hotspot in recent years. Particularly with the project of digital movie plays in rural places, the requirements on high-definition movie players are correspondingly increasing. However, the high-definition movie players in the market are always to be of high prices, easy broken and less interface at present. Even worse the movie players don't have enough speed to play the high-definition movies with the more and more video stream.In orded to solve the problems, a high-definition movie player is designed to play 1920×1080 MPEG-4 video basing on embedded platform. Four major parts were included in the thesis.Firstly, the principle of hardware and usage of software development kit (SDK) are introduced which based on EM8623L platform from Sigma Designs company. The embedded software development platform is built basing on the basis.Secondly, the design principles and implementation processes are proposed from the perspective of software design. And then three modules were completed which including normal play module, power failure continued showing module and fault-tolerant processing module etc.Thirdly, the problem of I/O speed in USB interface is proposed and the model of core kernel is introduced. Through deeply analyzing NTFS file system reading process, an optimization for improving the I/O speed in USB interface is given with a fine effect.Lastly, in order to conduct copyright protection better, the protocol of movie specific control is designed and realized according to the request of radio and television digital program center.The experiments are conducted to verify the various functions. Results of the experiments indicate that high-quality movie programs can be enjoyed through the high-definition movie player.