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1、淺談無(wú)線視頻監(jiān)控傳輸技術(shù)發(fā)展TalkaboutwirelessvideomonitoringtransmissiontechnologydevelopmentItcomesfromtheChinesesecuritynetworkVideoimagetransmissionwirelessbrokethetraditionalcoaxialcableandopticalfiberimagemonitoringunderthecontroloftheunfavorablesituationofhardwareconnection,moreflexibilityandconvenience,th
2、evideosurveillancesystembasedonwirelessnetworkarisesatthehistoricmoment?Wirelessvideotransmissiontechnologyhasbeenthedevelopmentofthewirelessmobilenetworkarchitectureandprotocolhadaprofoundimpact,butduetothelimitedbandwidthofwirelesschannelresources,interferencefactors,dataandvideosignal,highreal-t
3、imedemand?WirelessvideomonitoringtransfertechnologyThepurposeoftransmissionresearchonreliablechannelistomakefulluseofthechanneTsbandwidthresources?Inthecaseofunreliablechannel,thefocusofresearchontransmissionistomakefulluseofthebandwidthresourcestoachievereliabletransmission,whichisthefaulttolerant
4、transmissiontechnique?Thevideotransmissionmechanismonthewirelesschannelisdiscussedhere,anditsmainresearchpointsarefaulttoleranttransmissioncontro1.Thefaulttoleranttransmissioncontroltechnologycanbedividedintothreecategoriesbasedonthedifferentcontrolmethods:thepre-errorcontrol,thefeedbackbasedARQand
5、thesourcechannelcocoding.ForwardErrorControl(FEC)includeschannelcorrectioncodingtechniques,interwovenpackagingtechniques,andoptimizedpackageschedulingmechanisms?BasedonthefeedbackmechanismofARQtechniquesincludeusingmultipleReferenceframesofReferenceframeSelection(ReferencePictureSelection,RPS)mecha
6、nism,theHybridARQ(Hybrid,HARQ)mechanism,andbasedontheARQfeedbackerrortrackingtechnology.DuetothefaulttoleranttransmissioncontroltechnologybasedontheARQwithexcellentperformance,sointheemphasisonthetransmissionoftheARQrelatedcontroltechnology,anddiscusstheexistingvideotransmittingmechanismoffaulttole
7、rance?Theerrorcontrolmethodisusedtoovercomechannelerrors?Inchannelerrorprobabilityiswithseverecases(e.g.,existingmobi1echannel),inordertoobtainacertaintransmissionquality,forwarderrorcorrectioncodingmustbeb
