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1、太原理工大学硕士研究生学位论文 I基于 DSP 的视频处理开发平台的硬件设计 摘 要 随着人们安防意识的不断提高以及嵌入式技术的迅猛发展，视频监控系统得到了广泛的应用。目前，新一代的嵌入式网络视频监控系统更是集先进的图像压缩处理和网络通信技术于一体。用户通过有线或无线网络，便能在任何地点，任何时间来访问前端的视频监控设备，获取音、视频信息及报警信息，同时可以根据需要来控制前端设备。这种系统以嵌入式技术为基础，具有很高的稳定性和可靠性，目前，在银行监控、平安城市建设、智能家居等各个行业内都有很好的应用前景。 本文结合作者参与的基于 WIMAX 技术的高速无线视频监控系统项目，在分析了开发平台需求
2、的基础上，最终选定 TI 的高性能的多媒体处理器TMS320DM6437 作为视频处理开发平台的核心处理器，围绕 DM6437进行外部接口设计，详细介绍了设计方案。 本文首先简介了课题的研究背景以及项目的来源，阐述了视频监控系统的发展历史，对视频监控系统中应用的相关技术做了一定的说明；在仔细研究了嵌入式技术的基础上，对视频处理开发平台的功能需求和性能需求进行了分析，在总体设计原则下，提出了视频处理开发平台的总体设计方案，对所需的主处理器和传输协议进行了选择。然后，围绕总体设计方案对视频处理开发平台的各个功能模块进行了设计，主要包括：视频采集模块；音频模块；以太网通信模块；UART 通信模块；U
3、SB 接口模块；I2C总线控制模块；外部存储器扩展模块；电源模块及 J-TAG 仿真接口。最后，太原理工大学硕士研究生学位论文 II本文对高速 PCB 中信号的完整性进行了分析，根据高速系统的设计规则，完成了本系统的硬件平台 PCB 布局以及最后的 PCB 板制作。 论文最后是对全文工作的总结以及今后工作的展望；并在附录中提供了本设计的硬件设计电路图。因作者在项目中主要负责硬件的设计开发工作，故本文的主要内容偏重于硬件的设计与开发的介绍。 关键词关键词：DM6437；视频监控；视频处理；硬件平台； 太原理工大学硕士研究生学位论文 IIITHE HARDWARE DESIGN OF VIDEO
4、PROCESS DEVELOP PLATFORM BASED ON DSP ABSTRACT Video surveillance system has been widely used in our life by peoples increasing aware of security as well as the rapid development of embedded technology. At present, the new generation of embedded network video monitoring system integrates advanced im
5、age compression processing and network communication technologies. The users can access the front-end of the video surveillance equipment, get audio, video information and alarm information by a wired or wireless network at any place, any time, and control the front-end equipment as needed at the sa
6、me time. Based on embedded technology, this system has high stability and reliability that it has a high application potential in the bank surveillance, safe urban construction, intelligent home and so on presently. Combined with the high-speed wireless video surveillance system project based on WIM
7、AX technology which the author take part in, the paper analyzes the system requirements, selects TI high-performance multimedi processor TMS320DM6437 as the core processor, be based on web-video codec standard H.264, and describes the design in detail around the DM6437 external interface. Firstly, t
8、his article briefly introduced the research background of the subject as well as the source of the project, describes the history of video 太原理工大学硕士研究生学位论文 IVsurveillance systems, and makes some illustration about related technologies in the application of video surveillance system. After careful con
9、sideration of the embedded related technologies, the paper analyzes the needs of the video server; puts forward the system design plan, design principles and the main selection of the system according to the systems main technical indicators. Then, it designs the various functional modules around th
10、e systems overall program of the system, and it mainly includes: Video capture module; audio module; Ethernet communication module; UART communication module; USB interface module; I2C bus control module; external memory expansion modules; power modules and J-TAG-simulation interface. Finally, the p
11、aper analysis the signal integrity in the high-speed PCB, completes the design of this hardware platform PCB layout and final production of PCB board according to high-speed system design rules. Finally, the paper summaries the work of full text as well as prospects for future work; and provides all
12、 the hardware design circuit of the entire system in the appendix. Because the author is mainly responsible for hardware design in the project, the main contents of this paper emphasis on the hardware design and development. Key words: DM6437; video surveillance; video process; hardware platform; 太原
13、理工大学硕士研究生学位论文 IX图索引 图 1-1 第一代视频监控结构图. 2 Fig.1-1 Structure Graph of the first Video Surveillance System. 2 图 1-2 第二代视频监控结构图. 3 Fig.1-2 Structure Graph of the second Video Surveillance System. 3 图 1-3 第三代视频监控结构图. 4 Fig.1-3 Structure Graph of the third Video Surveillance System. 4 图 2-1 视频处理开发平台总体结构图. 9 Fig.2-1 Overall system architecture diagram. 9 图 2-2 DM6437 内部功能结构图. 12 Fig.2-2 DM6437 Internal functional structure graph. 12 图 3-1 CCD 摄像机.
