本文選題：視頻監(jiān)控 + 流媒體��； 參考：《電子科技大學(xué)》2014年碩士論文

【摘要】：隨著社會(huì)的日益開放與經(jīng)濟(jì)的飛速發(fā)展,人們對(duì)于公共財(cái)產(chǎn)和個(gè)人隱私的保護(hù)越來越重視,安防產(chǎn)業(yè)由此蓬勃發(fā)展。與此同時(shí),隨著互聯(lián)網(wǎng)時(shí)代的到來,網(wǎng)絡(luò)已經(jīng)滲透到人們生活的點(diǎn)點(diǎn)滴滴,人們對(duì)資源的共享和信息的有效傳遞要求也越來越高。流媒體技術(shù)應(yīng)運(yùn)而生。在視頻監(jiān)控系統(tǒng)中,如何提高其靈活性、實(shí)時(shí)性、便捷性,如何為人們提供更加清晰流暢、穩(wěn)定高效的視頻服務(wù)成為目前的研究熱點(diǎn)與重點(diǎn),具有很大的商機(jī)與市場(chǎng)前景。本文以“基于智能視音頻的LED大屏控制與遠(yuǎn)程監(jiān)視”項(xiàng)目為依托,在Linux平臺(tái)下完成了網(wǎng)絡(luò)視頻監(jiān)控系統(tǒng)服務(wù)器的軟件開發(fā)。服務(wù)器在系統(tǒng)中起著關(guān)鍵的作用,主要負(fù)責(zé)視音頻的同步、轉(zhuǎn)發(fā)和存儲(chǔ),同時(shí)響應(yīng)并處理各種客戶端的請(qǐng)求。首先,分析了視頻監(jiān)控系統(tǒng)的應(yīng)用現(xiàn)狀與發(fā)展趨勢(shì),并對(duì)服務(wù)器涉及的關(guān)鍵技術(shù)進(jìn)行了研究。主要研究了流媒體技術(shù)與實(shí)時(shí)傳輸協(xié)議的相關(guān)理論,并介紹了H.264視頻編碼和AAC音頻編碼技術(shù),同時(shí)對(duì)視音頻同步技術(shù)進(jìn)行了分析對(duì)比。其次,對(duì)網(wǎng)絡(luò)視頻監(jiān)控系統(tǒng)整體方案進(jìn)行了設(shè)計(jì),包括需求分析、系統(tǒng)整體架構(gòu)和服務(wù)器的架構(gòu)設(shè)計(jì)。再次,對(duì)網(wǎng)絡(luò)視頻監(jiān)控系統(tǒng)服務(wù)器進(jìn)行了詳細(xì)設(shè)計(jì)與實(shí)現(xiàn)。服務(wù)器主要分為視頻直播模塊、視頻點(diǎn)播模塊和云臺(tái)遠(yuǎn)程控制模塊。在視頻直播模塊中,設(shè)計(jì)了NTP同步時(shí)鐘,研究了利用ORTP庫進(jìn)行視音頻的實(shí)時(shí)傳輸,然后對(duì)視音頻實(shí)時(shí)流的同步做了詳細(xì)設(shè)計(jì)與實(shí)現(xiàn)。在視頻點(diǎn)播模塊中,對(duì)視音頻的存儲(chǔ)打包做了詳細(xì)設(shè)計(jì),并搭建了HTTP Live Streaming點(diǎn)播系統(tǒng),然后設(shè)計(jì)了基于XML的節(jié)目列表和數(shù)據(jù)庫的實(shí)現(xiàn)。在云臺(tái)遠(yuǎn)程控制模塊中,主要是服務(wù)器與云臺(tái)的控制設(shè)計(jì)和客戶端與服務(wù)器的交互設(shè)計(jì)。最后,對(duì)整個(gè)網(wǎng)絡(luò)視頻監(jiān)控系統(tǒng)服務(wù)器和客戶端進(jìn)行了功能測(cè)試和性能測(cè)試。實(shí)驗(yàn)結(jié)果表明,客戶端能夠流暢地進(jìn)行視頻的直播與點(diǎn)播,畫質(zhì)優(yōu)良且延遲較低,并能精確控制云臺(tái)轉(zhuǎn)動(dòng)及放縮,系統(tǒng)整體運(yùn)行良好。
[Abstract]:With the opening of society and the rapid development of economy, people pay more and more attention to the protection of public property and personal privacy. At the same time, with the arrival of the Internet era, the network has penetrated into the life of people bit by bit, people share resources and the effective transmission of information is increasingly demanding. Streaming media technology emerged as the times require. In the video surveillance system, how to improve its flexibility, real-time, convenience, how to provide more clear, smooth, stable and efficient video services has become the focus and focus of the current research, with great business opportunities and market prospects. Based on the project of "LED large screen Control and remote Monitoring based on Intelligent Video and Audio", the software development of network video surveillance system server is completed on Linux platform. The server plays a key role in the system, mainly responsible for the synchronization, forwarding and storage of video and audio, while responding to and processing various client requests. Firstly, the application status and development trend of video surveillance system are analyzed, and the key technologies involved in the server are studied. This paper mainly studies the theory of streaming media technology and real-time transmission protocol, introduces H.264 video coding and AAC audio coding technology, and analyzes and compares video and audio synchronization technology. Secondly, the overall scheme of network video surveillance system is designed, including requirement analysis, system architecture and server architecture design. Thirdly, the server of network video surveillance system is designed and implemented in detail. The server is mainly divided into live video module, video on demand module and remote control module. In the video broadcast module, the NTP synchronization clock is designed, and the real-time transmission of video and audio using ORTP library is studied. Then, the synchronization of video and audio real-time stream is designed and implemented in detail. In the VOD module, the storage and packaging of video and audio are designed in detail, and the HTTP Live streaming VOD system is built, and then the XML-based program list and database implementation are designed. In the remote control module of cloud head, it is mainly the control design of server and cloud head and the interaction design of client and server. Finally, the whole network video surveillance system server and client are tested for function and performance. The experimental results show that the client can carry out live and on-demand video smoothly, with good picture quality and low delay, and can accurately control the rotation and scaling of the cloud head, and the whole system runs well.
【學(xué)位授予單位】：電子科技大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2014
【分類號(hào)】：TP316.81;TN948.6

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本文編號(hào)：2055431