The Research And Design Of Multimedia Processor Based On H.264 And Davinci Technology

Recent years, the mine safety situation is very urgent. And, mine safety equipments have some shortcomings. Aiming at the mine emergency rescue, a multimedia information processing system is designed in this thesis.The processor has following functions: video collection, compression, memory, display and transmission; audio bi-directional communication and memory; environment parameter collecting, memory and transmission.The hardware and software of system is designed with the Davinci technology. The Davinci is a new technology for video and audio compression. Aiming audio and video compression, the processor of Davinci technology had been optimized. And the algorithm parts of Davinci software framework are modularized; the independence of the algorithm and application procedures is enhanced. The main performance parameters: video compression format H.264; image compression resolution D1(704×576), adjustable down; frame-rate 25fps, adjustable down.The thesis achieves the design and realization of some related software and hardware modules. The hardware uses Davinci dual-core processor TMS320DM6446 as the main processor,which integrates an ARM core and a C64x+ DSP core into one silicon; TMS320DM6446 improves the system integration and lowers the board level cost. The hardware design involves memory module, video module, audio module, ethernet module, UART module, power module and so on. And, the software is developed under Davinci software framework and uses MontaVista Linux as operating system. After analyzing software modules function, the thesis achieves the design of video capturing and compressing modules, MSP430F1232 module, net connection module.The system is a kind of new safety watch equipment. Besides the mine rescue, this technical result can be applied to other safety watch domains. At present, the hardware circuit board of system has been debugged. And, the main software modules design of system has been completed, succeeded in running in Davinci digital video evaluation module (DVEVM).