【摘要】：視頻監(jiān)控是當(dāng)今保障社會長治久安必不可少的科技手段,其發(fā)展歷史達(dá)三十年之久。在這三十年的發(fā)展歷程中,主要以模擬信息處理技術(shù)為基礎(chǔ)的傳統(tǒng)視頻監(jiān)控系統(tǒng)逐漸暴露出了諸多不足之處,如清晰度不夠、難以實(shí)現(xiàn)網(wǎng)絡(luò)化,不易集中管理等等。隨著近幾年電子集成技術(shù)以及計(jì)算機(jī)網(wǎng)絡(luò)化的迅猛發(fā)展,傳統(tǒng)視頻監(jiān)控行業(yè)受到的關(guān)注度越來越高,并逐步被數(shù)字化的視頻監(jiān)控所取代。 針對以上背景,本文設(shè)計(jì)和實(shí)現(xiàn)了一款嵌入式網(wǎng)絡(luò)攝像機(jī),主要工作分為硬件和軟件兩大部分。在硬件部分,本文根據(jù)對網(wǎng)絡(luò)攝像機(jī)的需求分析,對各模塊系統(tǒng)進(jìn)行設(shè)計(jì)、選取和連接,構(gòu)建出硬件平臺；在軟件部分,先通過對嵌入式Linux操作系統(tǒng)的移植來搭建軟件開發(fā)環(huán)境,然后著重討論了基于V4L2標(biāo)準(zhǔn)的視頻驅(qū)動程序的設(shè)計(jì)和編寫,最后簡要地設(shè)計(jì)出流媒體服務(wù)器和Web服務(wù)器用以對整個系統(tǒng)進(jìn)行測試,并作出測試評價。 本項(xiàng)目采用飛思卡爾公司推出的i.MX27處理器為核心芯片,設(shè)計(jì)和實(shí)現(xiàn)了嵌入式音視頻數(shù)據(jù)的采集與傳輸系統(tǒng),即網(wǎng)絡(luò)攝像機(jī)的硬件平臺。該設(shè)計(jì)極大程度地發(fā)揮了i.MX27芯片在多媒體數(shù)據(jù)處理方面的長處,大幅度地減少多媒體數(shù)據(jù)的處理量,也緩解了多媒體網(wǎng)絡(luò)的數(shù)據(jù)傳輸壓力。 為了更好地實(shí)現(xiàn)音視頻數(shù)據(jù)采集和傳輸,本項(xiàng)目采用了嵌入式Linux操作系統(tǒng)作為網(wǎng)絡(luò)攝像機(jī)的軟件開發(fā)平臺。然后著重討論了基于通用的V4L2(Video for Linux2)標(biāo)準(zhǔn)接口的視頻采集模塊的驅(qū)動程序的設(shè)計(jì)和實(shí)現(xiàn)。V4L2標(biāo)準(zhǔn)不僅提高了視頻采集程序的開發(fā)效率,同時也給其他開發(fā)人員對系統(tǒng)的升級和維護(hù)提供了很大的便利。 最后,本項(xiàng)目簡要地設(shè)計(jì)了流媒體服務(wù)器和Web服務(wù)器,為用戶提供網(wǎng)頁瀏覽的方式,同時對系統(tǒng)進(jìn)行測試,并給出測試評價。 本文設(shè)計(jì)并實(shí)現(xiàn)了基于ARM系統(tǒng)的網(wǎng)絡(luò)攝像機(jī)系統(tǒng),經(jīng)測試驗(yàn)證了系統(tǒng)的可行性,而且產(chǎn)品投入市場后獲得了用戶的一致好評。
[Abstract]:Video surveillance is an indispensable scientific and technological means to ensure the long-term stability of the society. It has a history of 30 years. In the past 30 years, the traditional video surveillance system, which is mainly based on the analog information processing technology, has gradually exposed many shortcomings, such as the lack of clarity, the difficulty of networking, the difficulty of centralized management, and so on. With the rapid development of electronic integration technology and computer network in recent years, the traditional video surveillance industry has received more and more attention, and gradually replaced by digital video surveillance. In view of the above background, this paper designs and implements an embedded network camera, which is divided into two parts: hardware and software. In the hardware part, according to the demand analysis of the network camera, this paper designs, selects and connects each module system, constructs the hardware platform; In the software part, the software development environment is built by transplanting the embedded Linux operating system, and then the design and writing of the video driver based on the V4L2 standard are discussed. Finally, the streaming media server and Web server are designed to test the whole system and evaluate the system. This project adopts the i.MX27 processor developed by Freescale as the core chip, and designs and implements the embedded audio and video data acquisition and transmission system, that is, the hardware platform of the network camera. This design greatly exerts the advantages of i.MX27 chip in multimedia data processing, greatly reduces the amount of multimedia data processing, and also alleviates the pressure of data transmission in multimedia networks. In order to achieve better audio and video data acquisition and transmission, the embedded Linux operating system is used as the software development platform of the network camera. Then, the design and implementation of the video capture module driver based on the general V4L2 (Video for Linux2 standard interface are discussed. The V4L2 standard not only improves the efficiency of the video capture program, but also improves the development efficiency of the video capture module. At the same time, it also provides great convenience for other developers to upgrade and maintain the system. Finally, the streaming media server and Web server are designed briefly, which can provide users with the way to browse the web pages. At the same time, the system is tested and evaluated. A network camera system based on ARM system is designed and implemented in this paper. The feasibility of the system is verified by test, and the product is well received by users after it is put into the market.
【學(xué)位授予單位】：北京交通大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2014
【分類號】：TN948.41

【參考文獻(xiàn)】

相關(guān)期刊論文 前5條

1 劉永峰;鄒逢興;;嵌入式系統(tǒng)的網(wǎng)絡(luò)接口模塊設(shè)計(jì)[J];兵工自動化;2006年02期

2 梁修如,嚴(yán)國萍;嵌入式視頻監(jiān)控服務(wù)器系統(tǒng)典型方案及其性能分析[J];電視技術(shù);2005年10期

3 張海峰;嵌入式Linux內(nèi)核及其驅(qū)動開發(fā)[J];紅外;2003年10期

4 劉少耿;張剛;程永強(qiáng);;基于RTSP/RTP嵌入式流媒體服務(wù)器的實(shí)現(xiàn)[J];太原理工大學(xué)學(xué)報;2008年S2期

5 史衛(wèi)華;劉步中;;基于X264的嵌入式視頻監(jiān)控系統(tǒng)設(shè)計(jì)[J];微計(jì)算機(jī)信息;2010年29期

，

本文編號：2301065