毕业设计说明书中文摘要数字信号处理器由于其强大的运算能力和特殊的软硬件结构，在图像处理方面有着广泛而重要的应用。本文在深入研究DSP的技术和理论后，设计了一种基于DSP的视频图像处理系统，该系统的研究主要基于DSP芯片体积小、处理速度快、实时性高、价格低廉等特点。目前的图像处理多以图像卡的形式出现，并借助于微机系统高处理速度和大存储容量来完成对图像的相关处理工作，但带来了体积大、成本高、工作稳定性差等缺点。本文在研究了DSP的特性后，确定了DSP的选型原则，经过分析和比较，选定了DSP的型号，并确定了系统各组成部分的设计方案，对系统各组成模块的功能和特点作了详细的介绍。本文根据视频解码芯片进行图像采集与转换，使用CPLD完成各种包含接口逻辑和时序匹配的视频图像处理系统,构造了系统各部分的电路原理图和印刷电路板（PCB）图，并对硬件电路板进行了全面调试，确保了硬件设计的合理性。并从硬件结构的角度，对系统整体开发框架及流程作了说明。系统采集的图像数据存放在SDRAM存储器中，每帧图像采集完成后通过中断方式通知DSP读取，DSP对一帧图像处理完后,再送往图像显示模块。该系统具有体积小、成本低、工作性能可靠等优点。84972

毕业论文关键词  视频火灾探测  DSP  ARM  TMS320DM642  i。MX27

毕业设计说明书外文摘要

Title    Hardware design of DSP image processing system                         

Abstract Digital Signal Processor (DSP) has been widely and significantly applied in picture processing because of its great operational capability and special software and hardware structures。 This paper designs a video picture processing system based on DSP after deep analysis on its technology and theory。 The system has main features like small volume DSP chips, high processing speed, high real time and at a low cost and others。 Current picture processing mainly appears as image cards。 It processes images by means of high processing speed and big storage capacity in microcomputer system, but resulting in such drawbacks as big volume, high cost and instability。 This paper, after studying the model, carefully analyzing features of DSP to know the rule of model selection, and confirm the models of DSP, makes it clear the design scheme of constituent parts of the system and makes specific introduction to functions and features of constituent modules。 This paper uses CPLD to complete the video processing system including interface logic and time matching with the picture processing and transition on the basis of video decipher chips, designs the PCB of system parts, and debugs the hardware circuit board comprehensively to make sure the rationality of the hardware design。 The paper also make explanations on the frame work and procedures of system development from the aspect of hardware structure。 Picture data captured by system is stored in SDRAM。 Every frame will be read by DSP after the capture is done, and then it will be sent to Image display modules。 The system has merit like small volume, low cost and dependable working performance。

Keywords  Video fire detection  DSP  ARM  TMS320DM642  i。MX27

目   次

1  引言 3

1。1  研究的目的和意义 3

1。2  国内外现状和发展趋势