视频监控系统外文翻译.docx

视频监控系统外文翻译.docx

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视频监控系统外文翻译

外文文献

Videosurveillancesystemissafeguardsystemisanimportantpartofapreventiveabilitystrongcomprehensivesystem.Videomonitoringwithitsconvenient,intuitiveandinformationcontentrichandwidelyusedinmanyoccasions.Inrecentyears,withthedevelopmentofmodernscienceandtechnology,inparticularnetworkbandwidth,computerprocessingpowerandstoragecapacityrapidlyincreaseandvariouspracticalvideoinformationprocessingtechnology,videosurveillancetechnologyalsoappearedaconsiderabledevelopment,videomonitoringenteredthedigitalnetworkage,increasinglyattentionbypeopleandattention.Thedevelopmentofvideosurveillancesystemismainlyearlyanalogclosed-circuittelevisionmonitoringsystemcombinedtovideomonitoringsystemmodelofdigitalvideomonitorandnowtheevolutionprocess,andthesystemofdigitalvideomonitorsystemnowaccordingtothetechnicaldevelopmentanddividedintothreestages:

digitalmonitormultimediastage,digitalmonitorDVRstageanddigitalmonitornetworkstage.

1,videomonitoringsystemsimulationssimulatevideomonitoringsystemisdividedintomicroprocessor-basedvideoswitchcontrolplusPCmultimediamanagementandpc-basedrealizetheswitchcontrolofmatrixhostandsystemmultimediamanagementtwotypes.Analogclosed-circuittelevisionmonitoringsystemisactuallythecombinationofmanysimulationmonitoringequipment,systemmainlyconsistsof"front-enddevice"and"terminalcontroldevice"and"signaltransmissionmedium"threeparts,including:

front-endequipmentismainlyacamera,haeundae,decoder,controlequipmentismainlyaswitchingmatrix,imagesegmentationdevice,monitorandcontrolthekeyboard,video,etc.Transmissionmediumincludingcable,control,etc.Asmicroprocessors,thefunction,performanceofmicrocomputersandheighten,multimediatechnologyapplication,thesysteminfunctionality,performance,reliability,structurepattern,etc,greatchangeshavehappenedtothevideomonitoringsystem,moreconvenient,thecompositionoftheinterfacewithothertechnicalsystemtendstoregulate,man-machineinterfacemorefriendly.Butbecausevideomonitorandcontrolsystemintheflowofinformationformdoesnotchange,thevideosignalisstillsimulationsystem,thenetworkstructureismainlyaChanGongNeng,one-way,lumpedwayofinformationcollectionnetwork,sosystemalthoughhasdevelopedtoahighlevel,hasnotmuchpotentialcandig,itslimitationsstillexist,tomeetthehigherrequest,digitalistheonlyway.Simulationmonitoringsystemofmainfaultsare:

a,usuallyonlysuitableforsmallrangeofregionalmonitorvideosignaltransmission,simulationtools,andismainlycoaxialcabletotransmitanalogvideosignalcoaxialcable,thedistanceisnotmorethanthedistancetwisted-pairdumpmoreshort,thisdeterminestheanalogmonitoronlysuitableforsinglebuilding,smallneighborhoodandothersmallrangeofplaces.B,thesystemofexpansionabilitydifferenceforhasalreadybuiltgoodsystem,ifwanttoaddnewmonitorypoint,oftenisonechangemakesallchange,newequipmentisalsohardtoaddtotheoriginalsystemin.C,unabletoformeffectivealarmlinkage,becauseeachpartbetweenindependentoperation,thecontrolprotocolisdifficulttoeachother,linkageinthelimitedscopeonly.

2videomonitoringsystem,digitalmultimediatechnology,videowithcompressiontechnology,networkcommunicationtechnologyofdigitalvideosurveillancesystemdevelopment,therapidrise,onthemarkettodaytherearetwotypesofdigitalvideomonitorsystemtype,oneisthedigitalvideoequipmentvideomonitoringsystemforthecore,anotherkindisembeddedvideoWebservervideomonitoringsystemforthecore.

Digitalvideocompressiontechnologymatures,thecomputerbasedonPCuniversalization,createconditionsmultimediamonitor.Thisnewvideomonitoringsystemofrapidrise,partiallyreplacedwithvideomatriximagesegmentationdevice,videoasthecore,complementarywithothertransmittersimulationvideomonitormode,itsadvantagemainlydisplaysin:

a,PCmultimediamonitorvideomatrix,thehostintegratedimagesegmentationdevice,manyfunctionsofvideorecorders,simplifiesthestructureofthesystem.B,becauseusethecomputernetworktechnology,digitalmultimediaremotenetworkmonitorfromdistancelimit.C,duetothelargecapacitydiskarrayinventorydeviceorCDstorage,cansaveyoualotoftapemedium,anditishelpfultothemultimediainformationsystem.

ButasthePCvideosurveillancevideosystemdevelopment,inactualengineeringinuseprocess,alsoexposedsomeshortage,mainlysystemworkinstability.ThevideosurveillancevideobasedonPCfor:

thestructureofsystemcompatible/industrialPC+videocapturecard+ordinary/morereliableoperationplatform+applicationsoftware.Fromthesystemcompositionstructuretoanalysis:

a,PCfor24houruninterruptedjob,itsperformanceisnotverystable,g-kongPCrelativecompatiblePC'sstabilityhaveaclassenhancement,suitableforcomplexworkingenvironment.B,operatingsystem:

withWindows98foroperationplatformsystem,theindustryinsidersknow,therearecertainWin98stabilityproblem,ifatthesametimetheapplicationsoftwareisnotverystandardized,it'llbeeasierinuseprocessappearsworkinstability,freezesandotherissues,andPCvideosurveillancevideosystemrealizationoftheirsoftwareinWindows95/98/NT,Unix,Linuxoperatingsystem,suchasgeneralwhilesystemfiles,applicationsoftwareandimagefilesarestoredinthedisk,videoprocessingmusthigh-densityinputoflargequantitiesofdata,andtoworkharddrive,theaveragefortheharddisklogic（suchasWindows,alreadycan'tadapttoFAT32）sosusceptible,causinginstabilitycrashedphenomenon.C,applicationsoftware:

thesimpleapplicationsoftwaresystemisnotcanbeusedforsecurityvideomonitoringsystem,fieldsofapplicationsoftwareabilityshouldsupportmultitaskingconcurrentprocessing,suchasmonitoring,video,playback,backup,alarm,control,remoteconnection,etc.TheabilitytodealwithmoreworkD,videocapturecard:

videosurveillancevideosystemforroadinputsystemareusuallyvideocapturecard,canusemultipleCARDSway,alsocanusesinglecardmode.Saycommonly,asinglecardwaybetterintegrationhighstabilitywillmorethanalltheway,manyusingcardhasacardwayveryeasytoformhardwareconflicts,itsstabilitywillhaveamajorinfluence.Embeddedsystemisusedasthecenter,softwareandhardwarecanbecut,toadaptapplicationsystemfunction,reliabilityandcost,volumeetccomprehensivedemandingspecialcomputersystemformonitoringsystem,i.e.thespecialcomputersystemtailored.

Embeddedsystemmainlyconsistsofembeddedprocessor,relevantsupporthardware,embeddedoperatingsystemandapplicationsoftwaresystemetc,itisthecollectionsoftwareandhardwareintheintegrationofcanworkindependently"devices".Embeddedoperatingsystemisakindofreal-time,supportsembeddedsystemapplicationoperatingsystemsoftware,itisembeddedsystemextremelyimportantconstituent,usuallyincludesandhardwarerelatedsoftwaredrivers,systemkernelbottom,devicedriverinterface,communicationprotocol,graphicinterface,standardizationbrowsers,embeddedreal-timeoperatingsystemintherelatedhardwareandefficiencyofdependence,softwareapplicationandspecificitysolidstatehasmoreprominentcharacteristics.Theadvantagesanddisadvantagesofembeddedsystem,thesystemforaspecialsystem,sothesystemissmall,instructiondownsizingandprocessingspeed.B,systemdatainROM/FLASHwithfastspeed,call,notbealtered,goodstability.C,systemtreatmentofgoodreal-timeperformance,stableperformance.D,documentmanagementsystemismoresuitableforlargeamountsofvideodata.E,innetworkfunction,audioandvideosyncissuesmayalsodifficultsatisfactory.

EmbeddedvideoWebservermode,abuilt-invideoserverembeddedWebserver,theembeddedreal-timemultitaskingoperatingsystem.Thevideosignaldigitalcamerasentbyhighcompressionchipafterthroughinternalbustocompress,built-inWebserver,InternetuserscanusedirectlyontheWebserverbrowsersoncameraimages,subscriberscanalsocontrolthecameralens,haeundae,theactionsoroperateonsystemconfiguration.

BecausethevideocompressionandWebfunctioncentralismtoasmallsizewithintheequipmentcanbedirectlyconnectedlans,achievenamelythatlook,omitedinsertedrangeofcomplexcable,convenientinstallation（onlysetanIPaddress）,theuserdoesnotneedtoinstallanyhardwaredevice,withthebrowsercanonlywatch.EmbeddedvideoWebservermonitoringsystemandothersurveillancesystemhasthefollowingcharacteristics:

acomparisonofembeddedvideoareaisvast,havebeensupervisedWebservermonitoringsystemofWebserverdirectlyconnectednetwork,nocablelengthandattenuation,andthelimitoftheconceptofnetworkisnodistance,completelyabandonedregionalconcept,expandhavebeensupervisedareas.B,thesystemhasalmostunlimitedseamlessexpansionabilityallequipmentismark,withIPaddressincreasedequipmentjustmeansthatIPaddresstheexpansion.C,canformaverycomplicatedmonitoringnetworkbasedonembeddedWebserveristhecoreofthemonitoringsysteminnetworkmode,withtraditionalanalogmonitorandbasedonPCplatformsscreeningmethodhasgreatlydifferent,becauseWebserveroutputhascompletedanalogtodigitalconversionandcompression,adoptuniformagreementonthenetworktransmission,supportacrosstherouteracrossthegateway,remotevideotransmission.D,stableandreliableperformance,w