【摘要】：數字信號處理器由于其強大的運算能力和特殊的軟硬件結構,在視頻圖像處理方面有著廣泛而重要的應用。視頻采集及視頻傳輸系統(tǒng)作為可視電話會議、遠程視頻監(jiān)控和工業(yè)自動化控制領域的一項核心關鍵技術,近年來得到了飛速的發(fā)展。為了滿足油田中石油開采的特殊需求,本文設計了一套基于DSP的多路視頻圖像采集傳輸系統(tǒng),它能夠實現對油井內輸油管道的狀況進行實時的監(jiān)測,主要研究內容如下： 深入研究了視頻編解碼技術以及視頻采集算法,對CMOS和CCD兩種圖像傳感器的技術特點以及性能進行比較,根據現場實際情況選擇CCD攝像頭進行視頻拍攝。 論文論述了視頻圖像采集系統(tǒng)的總體設計及其具體實現,設計了基于TMS320DM642DSP芯片的視頻圖像采集系統(tǒng)的硬件電路,給出了主要的硬件電路,以模塊化的方式分別對視頻圖像的采集模塊、存儲模塊、網絡模塊進行系統(tǒng)搭建。重點對視頻采集單元的視頻輸入接口電路和視頻輸出電路進行了設計,針對TMS320DM642的特點對DSP外圍電路的電源模塊、系統(tǒng)時鐘模塊以及外部存儲電路進行了優(yōu)化設計。 系統(tǒng)采用了嵌入式實時操作系統(tǒng)DSP/BIOS對系統(tǒng)的各個線程進行調度,基于TI提供的類/微驅動模型,為該視頻采集平臺設計了視頻采集驅動。利用網絡開發(fā)套件NDK網絡組件開發(fā)系統(tǒng)的網絡通信功能并對網絡應用任務進行設計,完成視頻傳輸。 本系統(tǒng)實用性與可擴展性兼顧,為石油礦井視頻監(jiān)控應用提供了一種具有良好經濟效益的方案�；贒SP的視頻采集系統(tǒng),由于可以靈活的修改其圖像處理算法,它的應用主要面向用戶的特定需求和對實時性有較高要求的場合。隨著技術發(fā)展和社會日益增長的需要,圖像的實時傳輸和網絡服務結合在一起而構成的完整傳輸系統(tǒng)將具有不可比擬的優(yōu)越性。因此,有理由相信在DSP的基礎上構建的視頻圖像采集,處理及傳輸系統(tǒng)具有廣闊的市場前景。
[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.
【學位授予單位】：武漢理工大學
【學位級別】：碩士
【學位授予年份】：2012
【分類號】：TP391.41;TP368.12

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本文編號：2361449