【正文】 本科畢業(yè)論文 動(dòng)態(tài)語(yǔ)音視頻傳輸技術(shù)的研究及實(shí)現(xiàn) 學(xué)生姓名： 指導(dǎo)教師： 所在院系： 計(jì)算機(jī)科學(xué)與技術(shù) 所學(xué)專業(yè)年級(jí)： 計(jì)算機(jī)科學(xué)與技術(shù) 2021 級(jí) 中國(guó)長(zhǎng)春 2021 年 5 月 1 目 錄 前言 .................................................................................................................................... 1 1 導(dǎo)論 ............................................................................................................................. 2 動(dòng)態(tài)音視頻傳輸技術(shù)現(xiàn)狀 ................................................................................... 2 多媒體和網(wǎng)絡(luò)多媒體 ............................................................................... 2 動(dòng)態(tài)音視頻現(xiàn)狀 ...................................................................................... 2 論文主要內(nèi)容和意義 .......................................................................................... 3 開(kāi)發(fā)環(huán)境 ........................................................................................................... 3 2 NetMeeting SDK基礎(chǔ)知識(shí) ............................................................................................ 4 NetMeeting SDK簡(jiǎn)介 ......................................................................................... 4 NetMeeting SDK組件關(guān)系 ....................................................................... 4 NetMeeting SDK對(duì)象模型 ....................................................................... 4 ................................................................................................................ 5 .............................................................................................. 5 .................................................................................... 5 3 視頻語(yǔ)音聊天系統(tǒng)設(shè)計(jì) ................................................................................................. 7 軟件的體系結(jié)構(gòu) ................................................................................................. 7 音視頻信號(hào)的采集、壓縮和傳輸 ........................................................................ 7 4 視頻語(yǔ)音聊天系統(tǒng) 的實(shí)現(xiàn) ............................................................................................. 8 代碼簡(jiǎn)介 ........................................................................................................... 8 實(shí)時(shí)通信客戶端接口 .......................................................................................... 8 通信類型選擇 .................................................................................................... 8 初始化一個(gè)會(huì)話 ................................................................................................. 9 處理實(shí)時(shí)通信事件 ............................................................................................11 創(chuàng)建一個(gè)通信會(huì)話 ........................................................................................... 13 處理實(shí)時(shí)流會(huì)話事件 ........................................................................................ 14 媒體事件 ............................................................................................... 14 強(qiáng)度事件 ............................................................................................... 15 會(huì)話狀態(tài)改變事件 ................................................................................. 16 客戶事件 ............................................................................................... 19 加入會(huì)話列表事件 ........................................................................................... 20 結(jié)束會(huì)話 ......................................................................................................... 20 5 程序界面 .................................................................................................................... 21 主界面 ............................................................................................................. 21 視頻音頻強(qiáng)度調(diào)節(jié) ........................................................................................... 21 聊天窗口界面 .................................................................................................. 22 6 結(jié) 語(yǔ) ......................................................................................................................... 24 致 謝 .............................................................................................................................. 25 參考文獻(xiàn) ........................................................................................................................... 26 2 動(dòng)態(tài)語(yǔ)音視頻傳輸技術(shù)的研究及實(shí)現(xiàn) 摘 要 本文以動(dòng)態(tài)語(yǔ)音視頻傳輸技術(shù)為研究對(duì)象，結(jié)合網(wǎng)絡(luò) IP的知識(shí)，綜合運(yùn)用軟件工程、面向?qū)ο蟪绦蛟O(shè)計(jì)等方法，在對(duì)我國(guó)現(xiàn)有的通信設(shè)施深入分析的基礎(chǔ)上，吸收了國(guó)際組織和發(fā)達(dá)國(guó)家對(duì)于動(dòng)態(tài)語(yǔ)音視頻傳輸技術(shù)的研究成果，設(shè)計(jì)了一個(gè)基于 IP的視頻語(yǔ)音聊天系統(tǒng)，利用視頻技術(shù) 和 IP數(shù)據(jù)通信技術(shù)通過(guò) IP網(wǎng)絡(luò)在兩地之間建立可視通信。通信雙方利用 PC終端、攝像頭和話筒就能實(shí)時(shí)地看到對(duì)方及對(duì)方所在的環(huán)境，也能聽(tīng)到對(duì)方的聲音。在效果上可以代替面對(duì)面交談。 本文簡(jiǎn)要介紹了語(yǔ)音視頻會(huì)議系統(tǒng)的軟件體系結(jié)構(gòu)及 NetMeeting SDK的編程接口，詳細(xì)介紹了利用 NetMeeting SDK提供的 COM組件構(gòu)建桌面視頻會(huì)議系統(tǒng)的過(guò)程。系統(tǒng)采用 VC++6． 0和 COM技術(shù)開(kāi)發(fā)，大大縮短了系統(tǒng)的開(kāi)發(fā)時(shí)間，同時(shí)也提高了應(yīng)用系統(tǒng)的兼容性和強(qiáng)壯性。 關(guān)鍵詞： 語(yǔ)音視頻聊天系統(tǒng) ； NetMeeting SDK； COM組件 3 Abstract In this paper, a dynamic voice and video transmission technology for the study, IP work with the knowledge, the integrated use of software engineering, objectoriented programming methods, in our existing munications facilities on the basis of indepth analysis, the absorption of the international anizations and developed The dynamic countries of voice, video transmission technology research, design an IPbased voice and video chat system, using video technology and IP data munications technology merits and demerits of IP work to be established between the two visual munications. Both sides use PC munication termi