The Design And Realization Of Network Multimedia Develop Platform Based On DM642

With the popularization of the broadband network and the introduction of manyhigh-efficient audio and video compression standards such as H.264, the real-timetransmitting of video and audio data over Internet has become an important researchfield of multimedia technology. Media processors are developed from highperformance DSP processors. Compared with general purpose DSPs , mediaprocessors are more powerful and convenient to use in multimedia applications.Network products designed with media processor can be easily adapted to newvideo/audio/data standards.DM642 is a new media processor provided by Texas Instrument Company.Integrated with C64x DSP core, audio and video peripheral interface and networkmodule, it offers ideal solutions for high performance multimedia applications. Whenworking at a clock rate of 600MHz, DM642 can execute 4800 million instructions persecond. This is a leading performance among all the media processors introduced intomarket.DM642 can be used to realize compression or decompression algorithm formany video/audio standards such as H.263, MPEG-2.The task of this paper is to develop a network multimedia develop platform basedon DM642,including hardware platform and software platform. The task of hardwareplatform development includes schematic design, PCB layout design, systemassembling, testing of all function modules. The task of software platformdevelopment includes constructing DSP/BIOS multi-task environment on hardwaresystem, programming DSP/BIOS drivers for all function modules on board, writingand debugging network communication programs. As a multi-functional platform, thisplatform can be use to develop the function of many multimedia applications. By nowthe SDTV source decoder has been realized on it. The function of networksurveillance system has also been partly realized. This paper discusses the design and realization of the DM642 hardwareplatform and the construction of the software platform. A network surveillance systemusing H.264 video standard realized on this DM642 platform is introduced in the end.