【摘要】：數(shù)字信號處理器由于其強(qiáng)大的運(yùn)算能力和特殊的軟硬件結(jié)構(gòu),在視頻圖像處理方面有著廣泛而重要的應(yīng)用。視頻采集及視頻傳輸系統(tǒng)作為可視電話會(huì)議、遠(yuǎn)程視頻監(jiān)控和工業(yè)自動(dòng)化控制領(lǐng)域的一項(xiàng)核心關(guān)鍵技術(shù),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(shè)計(jì)了一套基于DSP的多路視頻圖像采集傳輸系統(tǒng),它能夠?qū)崿F(xiàn)對油井內(nèi)輸油管道的狀況進(jìn)行實(shí)時(shí)的監(jiān)測,主要研究內(nèi)容如下： 深入研究了視頻編解碼技術(shù)以及視頻采集算法,對CMOS和CCD兩種圖像傳感器的技術(shù)特點(diǎn)以及性能進(jìn)行比較,根據(jù)現(xiàn)場實(shí)際情況選擇CCD攝像頭進(jìn)行視頻拍攝。 論文論述了視頻圖像采集系統(tǒng)的總體設(shè)計(jì)及其具體實(shí)現(xiàn),設(shè)計(jì)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(chǔ)模塊、網(wǎng)絡(luò)模塊進(jìn)行系統(tǒng)搭建。重點(diǎn)對視頻采集單元的視頻輸入接口電路和視頻輸出電路進(jìn)行了設(shè)計(jì),針對TMS320DM642的特點(diǎn)對DSP外圍電路的電源模塊、系統(tǒng)時(shí)鐘模塊以及外部存儲(chǔ)電路進(jìn)行了優(yōu)化設(shè)計(jì)。 系統(tǒng)采用了嵌入式實(shí)時(shí)操作系統(tǒng)DSP/BIOS對系統(tǒng)的各個(gè)線程進(jìn)行調(diào)度,基于TI提供的類/微驅(qū)動(dòng)模型,為該視頻采集平臺設(shè)計(jì)了視頻采集驅(qū)動(dòng)。利用網(wǎng)絡(luò)開發(fā)套件NDK網(wǎng)絡(luò)組件開發(fā)系統(tǒng)的網(wǎng)絡(luò)通信功能并對網(wǎng)絡(luò)應(yīng)用任務(wù)進(jìn)行設(shè)計(jì),完成視頻傳輸。 本系統(tǒng)實(shí)用性與可擴(kuò)展性兼顧,為石油礦井視頻監(jiān)控應(yīng)用提供了一種具有良好經(jīng)濟(jì)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(yīng)用主要面向用戶的特定需求和對實(shí)時(shí)性有較高要求的場合。隨著技術(shù)發(fā)展和社會(huì)日益增長的需要,圖像的實(shí)時(shí)傳輸和網(wǎng)絡(luò)服務(wù)結(jié)合在一起而構(gòu)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(chǔ)上構(gòu)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(xué)位授予單位】：武漢理工大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2012
【分類號】：TP391.41;TP368.12

【參考文獻(xiàn)】

相關(guān)期刊論文 前3條

1 龔乃建;尹崗;;DM642的I~2C總線配置與應(yīng)用[J];單片機(jī)與嵌入式系統(tǒng)應(yīng)用;2008年07期

2 張海龍;去耦電容在高速PCB中的應(yīng)用[J];電子質(zhì)量;2004年09期

3 劉正青;高速PCB設(shè)計(jì)中的串?dāng)_分析與控制研究[J];湖南工程學(xué)院學(xué)報(bào)(自然科學(xué)版);2004年04期

相關(guān)碩士學(xué)位論文 前3條

1 宋泉;基于DM642的網(wǎng)絡(luò)數(shù)字監(jiān)控平臺設(shè)計(jì)與實(shí)現(xiàn)[D];電子科技大學(xué);2007年

2 朱彥伊;基于DM642的多傳感器智能視頻監(jiān)控系統(tǒng)[D];電子科技大學(xué);2008年

3 許雅田;機(jī)器人視覺伺服半實(shí)物仿真研究[D];河北大學(xué);2010年

，

本文編號：2361449