本文選題：流媒體　切入點(diǎn)：網(wǎng)絡(luò)實(shí)時傳輸協(xié)議　出處：《浙江工業(yè)大學(xué)》2014年碩士論文　論文類型：學(xué)位論文

【摘要】：隨著多媒體業(yè)務(wù)的快速構(gòu)建,特別是網(wǎng)絡(luò)電視、網(wǎng)上教學(xué)、視頻會議、在線直播等以音視頻為主的視頻監(jiān)控已經(jīng)在互聯(lián)網(wǎng)上得到了極大的推廣,它們在人們的學(xué)習(xí)、工作以及生活方面都打上了深刻的烙印。多媒體業(yè)務(wù)未來的發(fā)展不但依靠網(wǎng)絡(luò)技術(shù)的提升,還需要網(wǎng)絡(luò)測量在質(zhì)量評估方面發(fā)揮更大的作用。本課題旨在開發(fā)出一款用于實(shí)現(xiàn)對移動視頻監(jiān)控系統(tǒng)進(jìn)行測試和分析的客戶端軟件,測試對象為在IP網(wǎng)絡(luò)中實(shí)時傳輸?shù)囊纛l和視頻。采用被動流量測試方法,在共享網(wǎng)絡(luò)下捕獲各種網(wǎng)絡(luò)數(shù)據(jù)包,著重解析ARP、IP、ICMP、TCP、UDP、RTP網(wǎng)絡(luò)層協(xié)議的具體信息,根據(jù)RTP報頭的關(guān)鍵字段計算出發(fā)送包數(shù)、接收包數(shù)、丟包率、時延抖動等QoS參數(shù),從而為流媒體數(shù)據(jù)的質(zhì)量評估提供了客觀依據(jù)。本文首先介紹了實(shí)時傳輸協(xié)議的報頭結(jié)構(gòu)、工作原理和打包策略,以及WinPcap技術(shù)的主要功能、組成框架和安裝過程。然后對客戶端軟件的設(shè)計和實(shí)現(xiàn)進(jìn)行了闡述,設(shè)計過程中介紹了軟件的性能測試指標(biāo)、整體框架、MFC界面的設(shè)計,還對捕獲模塊和分析模塊這兩大核心內(nèi)容展開了詳細(xì)的設(shè)計分析。最后利用客戶端測試軟件進(jìn)行功能的測試以及音視頻數(shù)據(jù)的分析。在移動設(shè)備有線音視頻采集和3G無線音視頻采集的兩種實(shí)驗環(huán)境下進(jìn)行數(shù)據(jù)比較,分析了丟包率、時延抖動和傳輸速率等參數(shù),使用MATLAB繪制成圖表來全面客觀地闡述參數(shù)對音視頻服務(wù)質(zhì)量的影響。
[Abstract]:With the rapid construction of multimedia business, especially the network television, online teaching, video conference, live broadcast and other audio-video surveillance has been greatly promoted on the Internet, they are learning in people. Work and life are deeply branded. The future development of multimedia business depends not only on the improvement of network technology, The purpose of this paper is to develop a client software for testing and analyzing mobile video surveillance system. The test object is audio and video transmitted in real time over IP network. The passive traffic testing method is used to capture all kinds of network data packets under the shared network, and the detailed information of ARPIP IP / IP / TCP / UDP / RTP network layer protocol is analyzed emphatically. According to the key fields of the RTP header, the QoS parameters such as the number of packets sent, the number of packets received, the rate of packet loss and the delay jitter are calculated, which provides an objective basis for the quality evaluation of streaming media data. Firstly, this paper introduces the header structure of the real-time transmission protocol. The working principle and packaging strategy, as well as the main functions of WinPcap technology, the composing frame and the installation process are described. Then, the design and implementation of the client software are described, and the performance test indexes of the software are introduced in the design process. The design of MFC interface, In addition, the capture module and the analysis module are designed and analyzed in detail. Finally, using the client test software to test the function and analyze the audio and video data. Compared with the two experimental environments of 3G wireless audio and video acquisition, The parameters such as packet loss rate, delay jitter and transmission rate are analyzed, and the effect of parameters on the quality of service of audio and video is described objectively and comprehensively by using MATLAB to chart.
【學(xué)位授予單位】：浙江工業(yè)大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2014
【分類號】：TN919.8

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本文編號：1578767