The Design Of The Software For DVB_T Portable Digtal TV Receiver

With the rapid developing of the digital broadcasting technology, digital TV began to appear in the ordinary family. Consumer can enjoy thousands of programs along with all kinds of teletext information in their own home now, and the sound and image quality of the programs are all DVD quality. In the big family of the digital TV field, has achieved more and more recognition on both transfer mode and receiving technology, because of its wireless and mobile receiving future, especial of its substitute for current analog TV broadcasting. The DVB_T portable digital TV receiver is used as the user-end equipment in the digital television broadcasting, which can provide DVB_T digital television program everywhere. The market of the DVB_T portable digital TV receiver will be lively.The DVB_T portable digital TV receiver is designed and developed based on the Cx24156 system control chip of Conexant Systems, Inc., with ARM920T kernel used for the Cx24156 main chip and Nucleus PLUS embedded OS chosen as the operating system.The thesis firstly introduces the present situation and the future of the development of the digital TV industry. Then the architectures of hardware and software are briefly described.And the design of codeloader and application program used in the software systerm are analyzed thoroughly. Then the thesis puts more emphasis the section of author’s main reserch——1、Transplant the driver code of DIBCOM3000 demodulator running at PC into the Conexant embedded playform 2、Modify the OSD application program according to the habit of the user.Excepting this, the thesis discusses the software development environment and the debug steps.The feasibility of methods for designing and implementing the DVB_T portable digital TV receiver described in this paper has been proved by experiments and practice. The DVB_T portable digital TV receiver is developed successfually, and can be turned into practical product.In this project, the author is also in charge of the drawing of the schematic and pcb except for the above_mentioned software work.