視頻會(huì)議的外文翻譯

視頻會(huì)議的外文翻譯VisualC++程序設(shè)計(jì)21世紀(jì)將是信息化社會(huì)，以信息技術(shù)為主要標(biāo)志的高新技術(shù)產(chǎn)業(yè)在整個(gè)經(jīng)濟(jì)中的比重不斷增長，隨著計(jì)算機(jī)技術(shù)的飛速發(fā)展，社會(huì)對(duì)人才的計(jì)算機(jī)應(yīng)用與開發(fā)水平的要求也日益增高，為適應(yīng)形式，其中VC++技術(shù)及其產(chǎn)品是當(dāng)今世界計(jì)算機(jī)發(fā)展的一塊巨大領(lǐng)域。Windowsxp是目前主流圖形化操作系統(tǒng)，運(yùn)行各種各樣的window操作系統(tǒng)的個(gè)人計(jì)算機(jī)已在全球的家庭和辦公壞境中廣泛使用，而越來越多的個(gè)人計(jì)算機(jī)具有internet功能和多媒體功能又推動(dòng)了對(duì)各種各樣功能強(qiáng)，速度快的應(yīng)用軟件的進(jìn)一步需求。目前有一種對(duì)microsoft所取得的成功進(jìn)行誹謗的氣氛，然而，microsoft的成功加上它對(duì)標(biāo)準(zhǔn)化的承諾，使得有承諾的windows編程人員利用他們掌握的技術(shù)在全球范圍內(nèi)得到越來越大的回報(bào)，由于西方社會(huì)的承認(rèn)和計(jì)算機(jī)已越來越深入到每個(gè)人的生活中，因而對(duì)他們的技術(shù)需求與日俱增，從而使得他們的回報(bào)、經(jīng)濟(jì)收入和其他各方面相應(yīng)地取得了滿意的結(jié)果。 VisualC++編程語言是由Microsoft公司推出的目前極為廣泛的可視化開發(fā)工具，利用VisualC++可以開發(fā)基于Widnows平臺(tái)的32位應(yīng)用程序，依靠強(qiáng)大的編譯器以及*絡(luò)與數(shù)據(jù)庫的開發(fā)能力，用VisualC++可以開發(fā)出功能強(qiáng)大的應(yīng)用程序。VC++是操作系統(tǒng)中快速應(yīng)用開發(fā)環(huán)境的最新版本。它也是當(dāng)前Windows平臺(tái)上第一個(gè)全面支持最新WEB服務(wù)的快速開發(fā)工具。無論是企業(yè)級(jí)用戶，還是個(gè)人開發(fā)者，都能夠利用VC++輕松、快捷地開發(fā)優(yōu)秀的基于通信的程序，開發(fā)高效靈活的文件操作程序，開發(fā)靈活高效的數(shù)據(jù)庫操作程序，等等。VC++是惟一支持所有新出現(xiàn)的工業(yè)標(biāo)準(zhǔn)的RAD壞境，包括XML（擴(kuò)展標(biāo)記語言）（可擴(kuò)展樣式語言），SOAP（簡單對(duì)象存取協(xié)議）和WSDL（Web服務(wù)器描述語言）等。VC++是可視化的快速應(yīng)用程序開發(fā)語言，它提供了可視化的集成開發(fā)壞境，這一壞境為應(yīng)用程序設(shè)計(jì)人員提供了一系列靈活先進(jìn)的工具，可以廣泛地用于種類應(yīng)用程序設(shè)計(jì)。在VC++的集成開發(fā)壞境中，用戶可以設(shè)計(jì)程序代碼、運(yùn)行程序、進(jìn)行程序錯(cuò)誤的調(diào)試等，可視化的開發(fā)方法降低了應(yīng)用程序開發(fā)的難度OVC++的基礎(chǔ)編程語言是具有面向?qū)ο筇匦缘腃++語言。C++具有代碼穩(wěn)定、可讀性好、編譯速度快、效率高等優(yōu)點(diǎn)，并將面向?qū)ο蟮母拍畹玫匠浞值陌l(fā)揮，使這種語言有了全新的發(fā)展空間。使用VC++，我們幾乎可以做任何事情，還可以撰寫各種類型的應(yīng)用程序，動(dòng)態(tài)鏈接庫（DLL）、CON、或CORBA對(duì)象，CGI程序，MicrosoftBackOffice應(yīng)用程序。程序的規(guī)模小到簡單的個(gè)人數(shù)據(jù)庫應(yīng)用，大到復(fù)雜的企業(yè)的多層次分布式系統(tǒng)，都可以使用VC++進(jìn)行開發(fā)，其友好的集成開發(fā)界面，可視化的雙向開發(fā)模式，良好的數(shù)據(jù)庫應(yīng)用支持高校的程序開發(fā)和程序運(yùn)行，備受廣大程序開發(fā)人員的好評(píng)。尤其是VC++對(duì)數(shù)據(jù)庫應(yīng)用的強(qiáng)大支持，大大提高了數(shù)據(jù)庫應(yīng)用軟件開發(fā)的效率，縮短了開發(fā)周期，深受廣大數(shù)據(jù)庫應(yīng)用程序設(shè)計(jì)人員的喜愛。VC++為數(shù)據(jù)庫應(yīng)用開發(fā)人員提供了豐富的數(shù)據(jù)庫開發(fā)組件，使數(shù)據(jù)庫應(yīng)用開發(fā)功能更強(qiáng)大，控制更靈活，編譯后的程序運(yùn)行速度更快。在VisualC++中包含了大量新功能：一些新的控件（例如，你可能在MicrosoftOutlook電子郵件應(yīng)用程序中日期選擇器控件）目前已能應(yīng)用到你自己的應(yīng)用程序中。各種圖像現(xiàn)在已能與組合框中的項(xiàng)相關(guān)聯(lián)，而且可以利用擴(kuò)充的組合框控件將圖像顯示在組合選擇框中和下列列表中。在 Office97和InternetExplorer4中已使用的一般的工具條和尺寸可調(diào)節(jié)的工具條都以集成在其類庫中，以供你用于你自己的應(yīng)用程序中。你可以在你自己的應(yīng)用程序中使用InternetExplorer，查看Web頁和HTML的內(nèi)容。面向?qū)ο篌w系結(jié)構(gòu)技術(shù)有助于創(chuàng)建行業(yè)性軟件開發(fā)機(jī)構(gòu)。例如交通規(guī)劃盡管具有差別，但各城市所需要的軟件基本上是相同的，這就為軟件開發(fā)機(jī)構(gòu)提供了一種制作面向交通規(guī)劃的軟件框架（注意這里講的是軟件框架而不是通用性軟件）的機(jī)會(huì)。這種框架一旦開發(fā)成功，就可以多次反復(fù)利用。思維方式?jīng)Q定解決問題的方式，傳統(tǒng)軟件開發(fā)采用自頂向下的思想知道程序設(shè)計(jì)，即將目標(biāo)分為若干子目標(biāo)，字母表再進(jìn)一步劃分下去，知道目標(biāo)能被編程實(shí)現(xiàn)為止。面向?qū)ο蠹夹g(shù)是包含數(shù)據(jù)和對(duì)數(shù)據(jù)操作的代碼實(shí)體，或者說實(shí)在傳統(tǒng)的數(shù)據(jù)結(jié)構(gòu)中加入一些被稱為成員函數(shù)的過程，因而賦予對(duì)象以動(dòng)作。而在程序設(shè)計(jì)中，對(duì)象具有與現(xiàn)實(shí)世界的某種對(duì)應(yīng)關(guān)系，我們正式利用這種關(guān)系對(duì)問題進(jìn)行分解。BMP是bitmap的縮寫，即為位圖圖片。位圖圖片是一種稱作“像素”的單位存儲(chǔ)圖像信息的。這些“像素”其實(shí)就是一些整體排列的色彩(或黑白)點(diǎn)，如果這些點(diǎn)被慢慢放大，你就會(huì)看到一個(gè)個(gè)的“像素中填充著自己的顏色，這些“像素“整齊地排列起來，就成為了一副BMP圖片，并以.bmp(.rle,.dib等)為擴(kuò)展名。BMP(Bitmap-File)圖形文件是Windows采用的圖形文件格式，在Windows壞境下運(yùn)行的所有圖像處理軟件都支持BMP圖像文件格式°BMP：Windows位圖可以用熱河顏色深度(從黑白到24為顏色)存儲(chǔ)單個(gè)光柵圖像。Windows位圖文件格式與其他MicrosoftWindows程序兼容。它不支持文件壓縮，也不適用于WEB頁。從總體上看，Windows位圖文件格式的缺點(diǎn)超過了它的優(yōu)點(diǎn)。為了保證圖片圖像的質(zhì)量，請(qǐng)使用PNG文件、JPEG文件或者TIFF文件OBMP文件適用于Windows中的強(qiáng)紙。優(yōu)點(diǎn)：BMP支持1位到24位顏色色深度。BMP格式與現(xiàn)有Windows程序(尤其是較舊的程序)廣泛兼容。缺點(diǎn)：BMP不支持壓縮，這會(huì)造成文件非常大。BMP文件不受WEB瀏覽器支持。計(jì)算機(jī)技術(shù)迅速發(fā)展的時(shí)代，圖像文件作為傳遞信息的重要方法之一有著重要作用。每種圖像格式都有自己的特點(diǎn)與應(yīng)用領(lǐng)域，各種圖像文件通過格式轉(zhuǎn)換軟件實(shí)現(xiàn)相互的轉(zhuǎn)換，用戶根據(jù)自身的需求選擇合適的格式以達(dá)到最佳的使用效果隨著計(jì)算機(jī)軟件、硬件技術(shù)的如新月異的發(fā)展和普及，人類已經(jīng)進(jìn)入一個(gè)高速發(fā)展的信息化時(shí)代，人類大概有80%的信息來自圖像，科學(xué)研究，技術(shù)應(yīng)用中圖像處理技術(shù)越來越成為不可缺少的手段。圖像處理所涉及的領(lǐng)域有軍事應(yīng)用、醫(yī)學(xué)診斷、工業(yè)監(jiān)控、物體的自動(dòng)分檢識(shí)別系統(tǒng)等等，這些系統(tǒng)無不需要計(jì)算機(jī)提供實(shí)時(shí)動(dòng)態(tài)、效果逼真的圖像。前言會(huì)議，是人類社會(huì)經(jīng)濟(jì)生活中不可或缺的一部分，有關(guān)的研究表明，通信的有效性約55%依賴于面對(duì)面(face-to-face)的視覺效果，38%依賴于說話語音，視聽是人們獲取信息的最重要形式，而面對(duì)面的討論(face-to-face)是人類表達(dá)思想最豐富的一種方式。自工業(yè)革命后，科技的發(fā)達(dá)使得通信技術(shù)有了突破性的進(jìn)展，電話和電報(bào)的發(fā)明，使遠(yuǎn)地的人們可以立即傳送聲音和文檔。然而，除了言語的溝通外，人類更注重的是表情和肢體的表達(dá)，僅僅是聲音的傳送已經(jīng)無法滿足現(xiàn)代人交流的需求，即時(shí)并且互動(dòng)的影像更能真實(shí)自然的傳送信息。（1）視頻會(huì)議系統(tǒng)正是在這種迫切需要的推動(dòng)下產(chǎn)生的新一代通信產(chǎn)品。視頻會(huì)議（VideoConference）系統(tǒng)是一種能把聲音、圖像、文本等多種信息從一個(gè)地方傳送到另一個(gè)地方的通信系統(tǒng)。有效發(fā)送基于視頻的信息，可以在遠(yuǎn)程部門和部門間開展合作，同時(shí)還可以實(shí)現(xiàn)諸如視頻會(huì)議和視頻點(diǎn)播等視頻應(yīng)用技術(shù)。視頻會(huì)議系統(tǒng)是計(jì)算機(jī)技術(shù)與通信技術(shù)相結(jié)合的產(chǎn)物，它作為多媒體通信技術(shù)的一個(gè)重要組成部分，正隨著波及全球的信息高速公路的興起而迅速發(fā)展起來。視頻會(huì)議從出現(xiàn)至今已有三十多年，從最開始的減少旅行費(fèi)用，提高工作效率，到911時(shí)的加速國內(nèi)外協(xié)作，保障人身安全等，再到SARS時(shí)保障社會(huì)的穩(wěn)定和各項(xiàng)工作最低限度的運(yùn)轉(zhuǎn)，視頻會(huì)議的優(yōu)越性正在越來越被廣泛的顯示出來。（2）鑒于視頻會(huì)議系統(tǒng)在軍事、經(jīng)濟(jì)、文化等領(lǐng)域給人類帶來的巨大作用和經(jīng)濟(jì)效益，各國競(jìng)相研究和開發(fā)視頻會(huì)議系統(tǒng)，特別是在超大規(guī)模集成電路、壓縮算法及視覺生理研究方面取得了突破性進(jìn)展和關(guān)于視頻會(huì)議的一系列國際標(biāo)準(zhǔn)相繼出臺(tái)，以及各種圖像實(shí)時(shí)處理芯片紛紛推出后，視頻會(huì)議系統(tǒng)的實(shí)用化才得到長足的發(fā)展。目前國內(nèi)外的主要應(yīng)用有：商務(wù)交流商業(yè)會(huì)議企業(yè)客戶服務(wù)和產(chǎn)品開發(fā)遠(yuǎn)程教學(xué)和技術(shù)培訓(xùn)市場(chǎng)調(diào)查和情報(bào)收集遠(yuǎn)程醫(yī)療和會(huì)診科研合作和工程設(shè)計(jì)跨國企業(yè)應(yīng)用招募員工從目前的發(fā)展來看，有關(guān)視頻會(huì)議技術(shù)的研究很多，有關(guān)的產(chǎn)品也非常豐富，盡管視頻會(huì)議系統(tǒng)有十分誘人的廣闊前景，但在這個(gè)領(lǐng)域中還有相當(dāng)多的技術(shù)問題亟待解決，其中在現(xiàn)階段影響視頻會(huì)議系統(tǒng)實(shí)用性、通用性及友好性的相關(guān)技術(shù)和有關(guān)問題有：軟件技術(shù)、數(shù)據(jù)庫技術(shù)、*絡(luò)技術(shù)、共享技術(shù)、資源控制技術(shù)、保密技術(shù)和會(huì)議模型技術(shù)。（3）本項(xiàng)課題主要研究的是用軟件的方式，配合一些必要的外設(shè)，實(shí)現(xiàn)一個(gè)小型視頻會(huì)議系統(tǒng)。視頻會(huì)議系統(tǒng)主要有三個(gè)部分組成，即通信*絡(luò)、會(huì)議終端和多點(diǎn)控制單元。視頻會(huì)議系統(tǒng)實(shí)質(zhì)上是計(jì)算機(jī)技術(shù)和通信技術(shù)相結(jié)合的產(chǎn)物，所以通信*絡(luò)是視頻會(huì)議系統(tǒng)的基礎(chǔ)組成部分之一，會(huì)議終端是將視頻、音頻、數(shù)據(jù)、信令等等各種數(shù)字信號(hào)分別進(jìn)行處理后組合成的復(fù)合數(shù)字碼流，再將碼流轉(zhuǎn)變?yōu)榕c用戶-*絡(luò)兼容的接口，符合傳輸*絡(luò)所規(guī)定的信道幀結(jié)構(gòu)的信號(hào)格式送上信道進(jìn)行傳輸。多點(diǎn)控制單元是視頻會(huì)議系統(tǒng)用于多點(diǎn)視聽信息的傳輸與切換部分，它是根據(jù)一定的準(zhǔn)則處理視聽信號(hào)，并根據(jù)要求分配各個(gè)要連接的信道，但它并不是視頻會(huì)議所必須的。（1）通信*絡(luò)是一系列的設(shè)備、機(jī)構(gòu)和進(jìn)程，通過它們，附著在*絡(luò)上的終端用戶設(shè)備能夠進(jìn)行有意義的信息交換。它涉及到*絡(luò)傳輸協(xié)議、*絡(luò)編程接口等內(nèi)容。（4）視頻會(huì)議系統(tǒng)的終端設(shè)備承擔(dān)了多種媒體信息的輸入、輸出和處理，以及用戶和*絡(luò)之間的連接、交互和控制等多項(xiàng)任務(wù)。它屬于用戶數(shù)字通信設(shè)備，在系統(tǒng)中處在用戶的視聽、數(shù)據(jù)輸入/輸出設(shè)備和*絡(luò)之間。（1）視頻會(huì)議中有時(shí)需要進(jìn)行多點(diǎn)間的信息傳輸和交換，這時(shí)可以借助于多點(diǎn)控制單元（MCU）來實(shí)現(xiàn)。多點(diǎn)控制單元實(shí)際上就是一臺(tái)多媒體信息交換機(jī)，實(shí)現(xiàn)多點(diǎn)呼叫和連接，實(shí)現(xiàn)視頻廣播、視頻選擇、音頻混合、數(shù)據(jù)廣播等功能，完成各終端信號(hào)的匯接與切換。MCU將各個(gè)終端送來的信號(hào)進(jìn)行分離，抽取出音頻、視頻、數(shù)據(jù)和信令，分別送到相應(yīng)的處理單元，進(jìn)行音頻混合或切換，視頻切換、數(shù)據(jù)廣播、路由選擇、會(huì)議控制、定時(shí)和呼叫處理等，處理后的信號(hào)由復(fù)用器按照格式組幀，然后經(jīng)*絡(luò)接口送到指定端口。（5）FundamentalsofProgrammingVisualC++The21stcenturyaretheinformationsocieties,unceasinglygrowtaketheinformationtechnologyasthemainsymbolhigh-techindustryintheentireeconomicalproportion,alongwiththeputertechnologyrapiddevelopment,thesocietyalsodaybydayenhancetotalentedperson\'sputerapplicationandthedevelopmentlevelrequest,aretheadaptionsituations,VC++technologyanditstheproductareahugedomainwhichnowtheworldputer2000isthepresentmainstreamgraphoperatingsystem,movesthevariousWindowsoperatingsystempersonalputeralreadyintheglobalfamilyandtheworkenvironmentthewidespreaduse,butmoreandmoremanypersonalputerhadtheInternetfunctionandthemultimediafunctionimpeltobestrongtovariousfunction,speedquickapplicationsoftwarefurtherpresenthasonekindthesuccewhichobtainstoMicrosofttocarryontheslandertheatmosphere,however,theMicrosoftsucceaddsonittothestandardizedpledge,thetechnologywhichenablestohavetheWindowsprogrammerswhichpledgeusesthemtograspintheglobalscopetoobtainthemoreandmorebigrepayment,becausethewesternsociety\'sacknowledgementandtheputermoreandmorepenetratedintoineachperson'\slife,thusgrowsdaybydaytotheirtechnicaldemand,thuscausedthemtherepayment,theineandothervariousaspectscorrespondinglyhasobtainedthesatisfactoryresult.VisualtheC++programminglanguageisatpresentextremelywidespreadvisibledevelopmentkitwhichpromotesbyMicrosoftCorporation,maydevelopusingVisualC++basedontheWidnowsplatform32applicationsprocedure,dependsupontheformidablepileraswellasthenetworkandthedatabasedevelopmentability,maydevelopthefunctionformidableapplicationprocedurewithVisualC++.VC++isintheoperatingsystemtherapidapplicationdevelopmentenvironmentnewestalsoisinthecurrentWindowsplatformthefirstprehensivesupportnewestWebservicefastdevelopmentofistheenterpriseleveluser,orindividualdevelopment,allcanberelaxedusingVC++,quicklydevelopoutstandinglybasedonthecorrespondenceprocedure,thedevelopmenthighlyeffectivenimbledocumentoperationsequence,thedevelopmentnimblehighlyeffectivedatabaseoperationsequence,andso++istheindustrystandardRADenvironmentwhichtheonlysupportallnewlyappears,(expansionmarklanguage)(mayexpandstylelanguage)includingXML,SOAP(simpleobjectdepositandwithdrawalagreement)andWSDL(Webserverdescriptionlanguage)andsoon.VC++isthevisiblefastapplicationproceduredevelopmentlanguage,ithasprovidedthevisibleintegrateddevelopmentenvironment,thisenvironmenthasprovidedaseriesofnimbleandtheadvancedtoolfortheapplicationprogrammingpersonnel,maywidelyuseinthetypeapplicationtheVC++integrateddevelopmentenvironment,theusermaydesigntheprocedurecode,theoperatingprocedure,carriesontheprogramerrorthedebuggingandsoon,thevisiblemethodofexploitationreducedtheapplicationproceduredevelopmentVC++foundationprogramminglanguagehastheobject-orientedcharacteristicC++++hasthecodestably,thereadabilitygood,thetranslationspeedisquick,theefficiencyhighermerit,andtheobject-orientedconceptwillobtainthefulldisplay,enablethislanguagetohavethebrand-newdevelopmentspaceUsesVC++,wenearlymayhandleanymatter,butalsomayposeplantseachkindoftypetheapplicationprocedure,dynamiclinkstorehouse(DLL),CON,orCORBAobject,CGIprocedure,MicrosoftBackOfficeapplicationprocedurescaletothesimpleindividualdatabaseapplication,isslightlybigtotheplexenterprise\'smulti-leveldistributionalsystem,allmayuseVC++tocarryonthedevelopment,itsfriendlyintegrateddevelopmentcontactsurface,thevisiblebidirectionaldevelopmentpattern,thegooddatabaseapplicationsupporthighlyeffectiveproceduredevelopmentandtheproceduremovement,preparesthegeneralproceduresdevelopmentpersonnel\'shigh++tothedatabaseapplicationformidablesupport,greatlyenhancedtheefficiencyinparticularwhichthedatabaseapplicationsoftwaredevelops,reducedthedevelopmentcycle,deeplygeneraldatabasesapplicationprogrammingpersonnel\'s++wasthedatabasehasprovidedtherichdatabasedevelopmentmoduleusingthedevelopmentpersonnel,causedthedatabaseapplicationdevelopmentfunctionformidable,controlmorenimble,afterthetranslationprocedurerunningratewasquicker.InhascontainedthemaivenewfunctionsinVisualC++:Somenewcontrols(forexample,youpoiblyemailapplicationproceduredateselectorcontrolinMicrosoftinOutlook)atpresenttobeabletoapplyinyouapplicationkindofimagecouldnowbeconnectedwiththebinationframeinitem,moreovermayusethebinationframewhichexpandstocontrolandfollowingtabulatesthepictorialdisplayinthebinationchoicetoolstrip97andInternetExplorerin4whichhasusedthemontoolstripandthesizemayadjustwhichinOfficealltointegrateinitskindofstorehouse,byusesinyouapplicationprocedureformayuseInternetExplorerinyouapplicationprocedure,examinestheWebpageandtheHTMLcontent.Theobject-orientedsystemstructuretechnologyishelpfultothefoundationprefeionalsoftwaredevelopmentexample,transportationplanalthoughhasthedifference,butvariouscitiesneedsoftwarebasicallyissame,thisprovidedonekindofmanufactureforthesoftwaredevelopmentorganization(topayattentiontoherelecturefacethetransportationplansoftwareframeissoftwareframebutwasnotversatilesoftware)ankindofframeoncedevelopssuccefully,mayrepeatedlyusemanytimes.Thethinkingmodedecidedsolvesthequestionway,thetraditionalsoftwaredevelopmentusesthefromthetopthoughtinstructionprogramming,soonthegoaldividesintocertainsubtargets,thesubtargetfurtherdividesagain,canprogramuntilthegoaltheobject-orientedtechnologybringstheenormouschangeforthesoftwaredesigndomain,itcarriesontheproceduredevelopmentusingthesoftwareobject,theso-calledobjectiscontainsthedataandthelogarithmaccordingtotheoperationcodeentity,orsaidisjoinssomeinthetraditionalconstructionofdatatobecalledthememberfunctiontheproce,thusentrustswiththeobjectbytheintheprogramming,theobjecthaswiththerealworldsomekindofcorrespondingrelations,wearepreciselyusethiskindofrelationstocarryonthedepositiontothequestion.BMPisthebitmapabbreviation,namelyforpositionchartpositionchartpictureiscalledas\”thepictureelement\”withonekindtheunitstoragepicture\”thepictureelement\”actuallyissomeneatarrangementscolored(orblackandwhite)thespot,iftheseisslowlyenlarged,youcanseecenteraddstooneeachone\”thepictureelement\”isimitatingowncolor,these\”thepictureelement\”neatlyarranges,hasbeeaBMPpicture,andtakebmp(rle,dibandsoon)asthe(Bitmap-File)thegraphicfileisthegraphicfileformwhichWindowsuses,movesallimageryproceingsoftwareundertheWindowsenvironmentalltosupporttheBMPimagedocument:TheWindowspositionchartmay(asblackandwhiteuseanycolordepthfromas24colors)tosavethesinglediffractiongratingWindowspositionchartdocumentformatandotherMicrosofttheWindowsprocedureissupportingdocumentationpreion,alsoillusesintheWebpage.Lookedfromtheoverallthat,theWindowspositionchartdocumentformatshortinghassurpaeditsordertoguaranteethepicturepicturethequality,pleaseusethePNGdocument,theJPEGdocumentortheTIFFBMPdocumentissuitableinWindowsthe:BMPsupports1to24colorsBMPformandtheexistingWindowsprocedure(anolderprocedure)widespreadisinparticular:BMPdoesnotsupportthepreion,thiscancreatethedocumenttobeextremelydocumentnotWebbrowserputertechnologyrapiddevelopmenttime,thepicturedocumenthasthevitalroleoneofastransmiioninformationimportantkindofpictureformallhasowncharacteristicandtheapplicationdomain,eachkindofpicturedocumentthroughtheformatconversionsoftwarerealizationmutualtransformation,theuseractsaccordingtoowndemandchoiceappropriateformtoachievethebestuseeffect.Thedevelopmentandthepopularizationwhichalongwithputersoftware,thehardwaretechnologychangeswitheachnewday,thehumanityalreadyenteredahighspeeddevelopmenttheinformationtime,thehumanityprobablyhas80%informationtoefromthepicture,inthescientificresearch,thetechnicalapplicationthepictureproceingtechnologymoreandmoretobeetheeentialproceinginvolvesthedomainhasthemilitaryapplication,medicinediagnosis,industrymonitoring,theobjectautomaticminuteexaminesrecognitionsystemandsoon,thesesystemsneedtheputertoprovidethereal-timetendencyall,theeffectlifelikepicture.1IntroductionMeetingofhumansocietyanintegralpartofeconomiclife,thestudyshowsthatapproximately55%oftheeffectiveneofmunicationdependsontheface(face-to-face)ofthevisualeffects,38%relyontalkingvoice,audio-visualpeopleThemostimportantformofaccetoinformation,andfacetofacediscuions(face-to-face)isthemostabundanthumanexpreionofideastheindustrialrevolution,thetechnologicaladvancementmadeabreakthroughprogreinmunicationtechnology,telephoneandtelegraphinventionofthedistantsoundofpeopleanddocumentscanbesent,inadditiontoverbalmunication,thehumanbeingspaymoreattentiontofacialexpreionsandbodyexpreion,onlyvoicetransmiionhasbeenunabletomeettheneedsofmodernmunication,real-timevideoandinteractivedeliveryofinformationmorerealandnatural.(1)videoconferencingsystemisinthisgeneration,drivenbyanurgentneedforanewgenerationofmunicationsConferencing(VideoConference)systemisacansounds,images,textandotherinformationsentfromoneplacetoanothermunicationtransmiionofvideo-basedinformationonaremotesectorandintersectoralcooperation,andalsocanbeachieved,suchasvideoconferencingandvideoapplicationssuchasvideoondemandconferencesystemistheputertechnologyandmunicationtechnologyproductofthebination,multimediamunicationtechnologyasanimportantpartofbeingaffectedwiththeriseoftheglobalinformationsuperhighwayandhasdevelopedrapidly.Videoconferencinghasbeenthirtyyearsfromtheemergence,fromthebeginningtoreducetravelcosts,improveefficiency,to911domesticandinternationalcollaborationtoacceleratethetimetoprotectthepersonalsafety,tosafeguardsocialstabilityduringSARSandtheminimumworkoperation,theadvantagesofvideoconferencingisincreasinglywidelydisplayed.(2)Inviewofthevideoconferencesysteminthemilitary,economicandculturalfields,theenormousroleofthehumanandeconomic,nationalresearchanddevelopmentofpetingvideoconferencingsystems,especiallyinverylargescaleintegratedcircuits,preionalgorithmsandvisualphysiologyresearchbreakthroughhasbeenmadeandonaseriesofinternationalstandardsforvideoconferencingwereintroduced,andavarietyofimageproceingchipshavetheintroductionofreal-timevideoconferencingsystemshaveealongwaybeforethepracticalmainapplicationathomeandabroadare:BusinemunicationBusineConferenceEnterprisecustomerserviceandproductdevelopmentDistancelearningandtechnicaltrainingMarketresearchandintelligencegatheringTelemedicineandconsultationCooperationinscientificresearchandengineeringdesignMultinationalapplicationStaffrecruitmentFromthecurrentperspectiveofthedevelopment,researchonalotofvideoconferencingtechnology,theproductsareveryrich,althoughveryattractivevideoconferencingsystemhasbroadprospects,butinthisareathereareconsiderabletechnicaliuestoberesolved,videoconferencingsystemsatthisstageofpracticality,versatilityandfriendlineoftherelevanttechnologiesandrelatediues:softwaretechnology,databasetechnology,networktechnology,sharingoftechnology,resourcecontrol,securitytechnologyandtechnologyconferencemodel.(3)Themainresearchtopicsisthewayofsoftware,withthenecearyperipheralstoachieveasmallvideoconferencingsystem.2,thebasicprinciplesofvideoconferencingsystemsVideoConferencing(VideoConference)systemisthebasicdefinition:twoormoreindividualsorgroupsofdifferentgeographiclocation,throughthetransmiionlineandmultimediaequipment,thesound,image,video,interactivevideoandfiletransferdata,toinstantandinteractivemunicationinordertopletethepurposeoftheconferencereadfromabove,videoconferencingisatypicalmultimediamunications,thenextdiagramisadiagramofatypicalvideoconferencingsystem:FigureAtypicalschematicofavideoconferencingsystemFromtheabovediagramwecanbasicallytell,thevideoconferencingsystemhasthreemainponents,namely,municationnetworks,conferencingterminalsandmultipointcontrolconferencingsystemsandputertechnologyiseentiallytheproductofbiningmunicationtechnology,sothemunicationnetworkisbasedvideoconferencingsystemponentoftheterminalseionisvideo,