本文關(guān)鍵詞：基于嵌入式系統(tǒng)的視頻采集與無線傳輸系統(tǒng)的設(shè)計(jì)與實(shí)現(xiàn)　出處：《寧夏大學(xué)》2014年碩士論文　論文類型：學(xué)位論文

  更多相關(guān)文章： 嵌入式系統(tǒng) Linux 無線局域網(wǎng) 視頻服務(wù)器

【摘要】：隨著社會的不斷發(fā)展進(jìn)步,人們對視頻監(jiān)控的需求越來越多,視頻監(jiān)控已經(jīng)滲透到日常生活、工業(yè)生產(chǎn)的各個(gè)方面。因?yàn)橐曨l監(jiān)控可以清晰地提供給使用者客觀的視覺材料,從而受到人們的廣泛關(guān)注。 本文回顧了視頻監(jiān)控系統(tǒng)的發(fā)展歷程,介紹了國內(nèi)外視頻監(jiān)控技術(shù)的研究現(xiàn)狀及未來的發(fā)展方向。根據(jù)本課題的研究目標(biāo),對系統(tǒng)功能進(jìn)行需求分析,提出了幾套基于嵌入式處理器的視頻監(jiān)控方案,對這幾套方案的特點(diǎn)及優(yōu)缺點(diǎn)進(jìn)行綜合分析和比較,最終確定了一套最優(yōu)方案：基于ARM11微處理器的B/S模式的視頻采集與無線傳輸方案。本方案采用高性能、低功耗的ARM11微處理器作為處理核心,配以功能強(qiáng)大的嵌入式Linux操作系統(tǒng),使用支持Linux-UVC協(xié)議標(biāo)準(zhǔn)的USB攝像頭作為圖像采集設(shè)備,配置并移植開源軟件mjpg-streamer視頻服務(wù)器,實(shí)現(xiàn)圖像的獲取、處理,并將處理后的圖像傳輸成MJPEG格式的流媒體,通過無線網(wǎng)絡(luò)發(fā)送到用戶平臺計(jì)算機(jī)。在用戶平臺,使用者通過網(wǎng)絡(luò)瀏覽器便可以觀看到視頻畫面。 本文對該系統(tǒng)的具體軟硬件進(jìn)行分析和優(yōu)缺點(diǎn)比較,確定了硬件平臺和軟件平臺的構(gòu)成。之后介紹了系統(tǒng)的整體設(shè)計(jì),闡述了系統(tǒng)的硬件設(shè)計(jì)和軟件設(shè)計(jì)。詳述了交叉開發(fā)環(huán)境和嵌入式開發(fā)平臺的搭建過程。然后介紹mjpg-streamer視頻服務(wù)器及其工作流程,詳細(xì)分析了基于V4L2應(yīng)用程序接口的視頻圖像采集技術(shù)、基于JPEG算法的圖像壓縮技術(shù)、基于TCP/IP協(xié)議族和套接字編程的網(wǎng)絡(luò)通信技術(shù)。最后,配置并移植mjpg-streamer視頻服務(wù)器到嵌入式開發(fā)平臺,最終建立一個(gè)視頻采集與無線傳輸實(shí)驗(yàn)平臺。通過實(shí)驗(yàn)測試得到結(jié)論：本系統(tǒng)能夠?qū)崿F(xiàn)視頻采集與無線傳輸功能,使用者在Windows XP平臺和Linux平臺都可以通過網(wǎng)絡(luò)瀏覽器觀看到視頻畫面,實(shí)現(xiàn)了視頻采集與無線傳輸系統(tǒng)的預(yù)期效果。
[Abstract]:With the continuous development and progress of society, people need more and more video surveillance, video surveillance has infiltrated into daily life. All aspects of industrial production. Because video surveillance can clearly provide users with objective visual materials, it has attracted wide attention. This paper reviews the development of video surveillance system, introduces the research status and future development direction of video surveillance technology at home and abroad. According to the research objectives of this topic, the requirements of the system functions are analyzed. Several video surveillance schemes based on embedded processor are put forward, and the characteristics, advantages and disadvantages of these schemes are analyzed and compared synthetically. Finally, a set of optimal scheme: video capture and wireless transmission scheme based on B / S mode based on ARM11 microprocessor is determined. This scheme adopts high performance. Low-power ARM11 microprocessor as the processing core, with a powerful embedded Linux operating system. Using the USB camera which supports the Linux-UVC protocol standard as the image acquisition device, the open source software mjpg-streamer video server is configured and transplanted to achieve image acquisition. The processed image is transmitted to the streaming media in MJPEG format and sent to the computer of the user platform through the wireless network. Users can view video images through a web browser. In this paper, the hardware and software of the system are analyzed and the advantages and disadvantages are compared, the hardware platform and the software platform are determined. After that, the overall design of the system is introduced. The hardware design and software design of the system are described. The process of building cross-development environment and embedded development platform is described in detail. Then the mjpg-streamer video server and its workflow are introduced. The video image acquisition technology based on V4L2 application program interface and the image compression technology based on JPEG algorithm are analyzed in detail. Network communication technology based on TCP/IP protocol family and socket programming. Finally, configure and transplant mjpg-streamer video server to embedded development platform. Finally, a video acquisition and wireless transmission experimental platform is established. The experimental results show that the system can achieve video capture and wireless transmission. The users can view the video picture through the web browser on the Windows XP platform and the Linux platform, and realize the expected effect of the video capture and wireless transmission system.
【學(xué)位授予單位】：寧夏大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2014
【分類號】：TN948.6

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