基于DSP的视频图像采集与传输系统的研究

发布时间：2018-11-27 16:35

【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,在视频图像处理方面有着广泛而重要的应用。视频采集及视频传输系统作为可视电话会议、远程视频监控和工业自动化控制领域的一项核心关键技术,近年来得到了飞速的发展。为了满足油田中石油开采的特殊需求,本文设计了一套基于DSP的多路视频图像采集传输系统,它能够实现对油井内输油管道的状况进行实时的监测,主要研究内容如下：深入研究了视频编解码技术以及视频采集算法,对CMOS和CCD两种图像传感器的技术特点以及性能进行比较,根据现场实际情况选择CCD摄像头进行视频拍摄。论文论述了视频图像采集系统的总体设计及其具体实现,设计了基于TMS320DM642DSP芯片的视频图像采集系统的硬件电路,给出了主要的硬件电路,以模块化的方式分别对视频图像的采集模块、存储模块、网络模块进行系统搭建。重点对视频采集单元的视频输入接口电路和视频输出电路进行了设计,针对TMS320DM642的特点对DSP外围电路的电源模块、系统时钟模块以及外部存储电路进行了优化设计。系统采用了嵌入式实时操作系统DSP/BIOS对系统的各个线程进行调度,基于TI提供的类/微驱动模型,为该视频采集平台设计了视频采集驱动。利用网络开发套件NDK网络组件开发系统的网络通信功能并对网络应用任务进行设计,完成视频传输。本系统实用性与可扩展性兼顾,为石油矿井视频监控应用提供了一种具有良好经济效益的方案。基于DSP的视频采集系统,由于可以灵活的修改其图像处理算法,它的应用主要面向用户的特定需求和对实时性有较高要求的场合。随着技术发展和社会日益增长的需要,图像的实时传输和网络服务结合在一起而构成的完整传输系统将具有不可比拟的优越性。因此,有理由相信在DSP的基础上构建的视频图像采集,处理及传输系统具有广阔的市场前景。
[Abstract]:Digital signal processor (DSP) has a wide range of important applications in video image processing due to its powerful computing power and special hardware and software structure. Video capture and video transmission system, as a key technology in video conferencing, remote video surveillance and industrial automation control, has been developed rapidly in recent years. In order to meet the special demand of oil production in oil field, this paper designs a multi-channel video image acquisition and transmission system based on DSP, which can realize real-time monitoring of oil pipeline condition in oil well. The main research contents are as follows: the video coding and decoding technology and video capture algorithm are deeply studied, and the technical characteristics and performance of CMOS and CCD image sensors are compared. According to the actual situation of the scene, CCD camera is selected for video shooting. This paper discusses the overall design and implementation of video image acquisition system, designs the hardware circuit of video image acquisition system based on TMS320DM642DSP chip, and gives the main hardware circuit. The video image acquisition module, storage module and network module are built by modularization. The video input interface circuit and video output circuit of video acquisition unit are mainly designed. According to the characteristics of TMS320DM642, the power supply module, system clock module and external storage circuit of DSP peripheral circuit are optimized. The system uses embedded real-time operating system (DSP/BIOS) to schedule each thread of the system. Based on the class / microdriver model provided by TI, the video capture driver is designed for the video acquisition platform. The network communication function of the system is developed by using the network development suite (NDK) and the network application task is designed to complete the video transmission. This system has both practicability and expansibility, and provides a good economic benefit scheme for the application of petroleum mine video surveillance. The video capture system based on DSP can flexibly modify its image processing algorithm. Its application is mainly oriented to the specific needs of users and has a high demand for real-time situations. With the development of technology and the increasing demand of society, the complete transmission system which is composed of real-time image transmission and network service will have incomparable advantages. Therefore, it is reasonable to believe that the video image acquisition, processing and transmission system based on DSP has a broad market prospect.
【学位授予单位】：武汉理工大学
【学位级别】：硕士
【学位授予年份】：2012
【分类号】：TP391.41;TP368.12

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