ip组播视频会议系统及关键技术分析-analysis of ip multicast video conference system and key technologies.docx

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ip组播视频会议系统及关键技术分析-analysis of ip multicast video conference system and key technologies.docx

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ip组播视频会议系统及关键技术分析-analysis of ip multicast video conference system and key technologies

AbstractWiththerapiddevelopmentofmultimediatechnologyandmodernnetworkcommunicationtechnology,theintercommunicationsbetweenenterprisesarebecomingmoreandmorefrequent.SoNetworkBasedVideoConferencingsystemhasbecomeahotspotinbothinandoutsideresearchfield.Onthebaseofit,wewentonourresearch.ThemotivationforthebeginningoftheresearchistheVideoConferencingSystemfundedbyLixingPowerCompany.Firstly,wegaveabriefintroductionofthestandardofinternationalvideoconferencingsystem,andanalyzethetraditionalstructureofvideoconferencingsystem.Also,wehavepointedouttheshortagesofthem.Onfollowing,wediscussthenewgenerationofvideoconferencingsystemwhichbasesonsoftwareswitchtechniqueindetail.Thencombinewiththedifficultieswemetintheproject,weputoureffortontheresearchofmaintechnologiesusedinthesystem.Thesearethemainaspects:intheaudioprocessingtechnology’saspect,wefocusoureffortontheaudiomixingtechnique.Bythoroughlyresearchingontheexistmaterials,weputforwardanewmethodofaudiomixing-weighedbyvoiceandcompetitionsystem;inthevideoprocessingtechnology’saspect,basedonthelargeframeofvideo,andtheunreliableserviceofUDP,weintroduceantechnologyofpackagingandunpacking;Becausemultimediadatarequireshighbandwidth,whichiseasytocausecongestion,withthehelpofTFRCsystem,weuseaIP-multicastcontrolsystembaseonautomationnetwork.Onthebasementofthosetheories,wedetailedthesystemwedesignedforLixingPowerCompany,includingthemodulesoftheclientandserver.Thesystemgotgoodeffectinpractice,andcouldbewidelyusedinmostcompany.Keywords:IP-multicast,multimediacommunication,audiovideotechnology;LixinPowerCompany’svideoconferencingsystem目录摘要............................................................................................................................IAbstract.........................................................................................................................II1绪论1.1课题的背景........................................................................................................(1)1.2国内外研究动向..........................