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TI DM642 -based embedded network video platform design and implementation

Author: LongZuo
Tutor: LiuZuoï¼›DaiXiaoXia
School: University of Electronic Science and Technology
Course: Electronics and Communication Engineering
Keywords: Video Compression Code DM642 H.264 X264
CLC: TP368.1
Type: Master's thesis
Year: 2011
Downloads: 57
Quote: 2
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Abstract


As the development of society and popularization of broad-band network, the demand on the network video supervisory system which is used in industries, military affairs and daily life has become more and more extensive. Limited by the cost, environment, volume, power dissipation and the like, replacing of pc, utilization of embedded video system which is used in video coding and decoding will become the trend. Limited by net-environment and bandwidth, we need an effective coding algorithm which can not only make the code rate maintain a lower level while providing a high quality image, but also has a good net adaptability.TMS320DM642 is a kind of DSP used in the sphere of multimedia processing proposed by TI. It can operate as 5760MIPS and be abundant of peripheral equipment interface, so it is adaptable for embedded video system. H.264 is a kind of new coding standard of video compressing coding proposed by ITU-T and ISO/IEC. While under the same quality of an image, H.264 can not only save code rate by 50% than H.263 and MPEG-4 but also adopt new technologies according to the characteristic of network transmission, so that it can adapt more and more extensive network application.The task of this paper is to develop a network video embedded platform based on DM642, including hardware platform, software platform, researches on H.264 key technology and its implement on DM642. The task of hardware platform development includes schematic design, PCB layout design,testing of all function modules.The task of software platform development includes constructing DSP/BIOS environment on hardware system, programming drivers for video modules,writing network communication programs. Then the X264 reference software is adopted as H.264 coder.Further discussion is focused on its encodeing paramenters and their optimization to tradeoff between the coding efficiency and the image quality.Finally,base on the feature of DM642,the work of transplanting X264 coder to DSP was done .Then the work of optimizing X264 coder was done on the project layer,C language layer and assemble language layer to meet the needs of real-time coding.

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