videorekordér

Princip

Videorekordér je základním nástrojem pro produkci televizních programů. Proces vývoje videorekordéru se také převedl z analogového signálu na formu digitálního signálu. Vzhledem k tomu, že zpracování videosignálu má 4:2:2,4:1:1,4:2:0-formáty CT, jsou ve formátech CT tra-div. a MPEG-2.Poměr komprese datového toku je různý a rychlost nahrávání je asi 200 Mbps, 100 Mbps, 50 Mbps a 25 Mbps. Šířka pásky je 3/4, 1/2,1/4 palce, MP a ME a brzy. Formáty digitálních videorekordérů jsou různé.

Digitální formát DV

ThehomeDVformatisinthedevelopmentstageofhomedigitalvideorecorders.Inordertoavoidtherepetitionoftheanalogvideorecorderformatdispute,itwasjointlyformulatedbysomewell-knownelectricalcompaniesintheworldAstandard.55majorcompanieshaveannouncedtheirsupportforthisformat,makingitaninternationalstandard.ForPALsystemsignals,ituses4:2:0samplingformat,8-bitquantizationandDCTintra-framecompression.Thecompressionratiois5:1,therecordingcoderateis25MB/S,andthesignal-to-noiseratiocanreach54dB.Foraudio,32KHZsampling,16-bitquantizeddual-channelstereomodecanbeused,and32KHZsampling,12-bitquantizedfour-channelmodecanalsobeused.TheimagequalityofthehomeDVformatisquitehigh,farexceedingthecommonS-VHSandHi8,becausethebandwidthoftheluminancesignalbandreaches6MHZ,andthebandwidthofthecolordifferencesignalreaches1.4MHZand3MHZrespectively.ThehomeDVformatalsousesa1/4-inchmetalparticletapewithatrackwidthof10microns.

Digitální formát DVCAM

DVCAM je také úspěšná profesionální videokamera s digitálními komponentami na základě domácího formátu DV. Stejně jako DVCRRO25 si klade za cíl vysokou kvalitu obrazu, malou velikost, lehkost a nízkou cenu. Používá formát vzorkování 4:2:0, 8bitovou kvantizaci a DCT v rámci komprese mezi snímky, komprese MB, poměr komprese 5 je 5, komprese, poměr 5 cor iseratio je větší než 54 dB a má 2 kanály 48 KHZ, 16bitové kvantování. Digitální zvuk. Používá1 /4palcová páska z kovových částic o šířce stopy 15 mikronů. Je obousměrně kompatibilní s formátem DV pro domácnost, to znamená, že pásky formátu DV lze přehrávat na videorekordérech DVCAM a pásky DV nahrané na videorekordérech DVCAM lze také přehrát na standardních videorekordérech ve formátu DV.

Digitalbetacamformát

Poměr signálu k šumu digitální betakamery může dosáhnout 62 dB, přijímá formát vzorkování 4:2:2, 10bitové kvantované zpracování digitálních komponent a používá elektroniku na bázi DCT Plochá adaptivní v rámci komprese v rámci snímku, s kompresním poměrem 2:1, s použitím 1/2-kanálových, 8-násobných, 4-kanálových, 2-palcových Digitální audio. Dokáže zkopírovat 30 generací kvality obrazu bez ztráty kvality a je kompatibilní s přehráváním komponent Betacam-SPanalog na videokazetách.

Formát DigitalBetacamSX

ThedigitalintegratedcamcordersanddigitalvideotaperecordersofthisformatseriesuseadvancedMPEG-24:2:2P@MLcompressionalgorithm,Compressionratio10:1,canrecord8bit4:2:2digitalcomponentvideosignals,andcanrecordandreproduce4channelsof16bituncompresseddigitalaudiosignals,using1/2inchmetalparticletape,andcompatiblewithreproducinganalogsignalsBetacamandBetacamSPformatbelts(providedbyDNW-A65PandDNW-A75P),whichmakesthetransitionofBetacamSXtoafullydigitalenvironmentmoreeconomicalandreasonable.

Digitální formáty DVCPRO25 a DVCPRO50

Formát DVCPRO

Při zpracování obrazu se používá velký počet standardních formátů 4:1:1,to znamená,jasvzorkovacífrekvencefy=13,5MHz,barevnýrozdílefPB,R=3,375MHz.Ve skutečnosti je videosignálvstupu DVCPRO ve formátu 4:2:2,po vypnutí 4:1 se znovu přehraje:1. interpolováno do formátu 4:2 :2formátový signál.Výstup.Z pohledu datového toku je čistý datový tokformátu4:2:2[(720+2×360)×576×8]×25≈165,9 Mb/s, převedeno na 4:1:1, je[(720+2×180)×57×6 ]×25≈124,4 Mb/s, komprimováno na 25 Mb/s pro záznam, požadovaný kompresní poměr je 124,4 Mb/s/25 Mb/s≈ 5:1. Pomocí 1/4palcové pásky MP lze zaznamenat také 4 kanály 16bitových digitálních zvukových signálů.

Formát DVCPRO50 je standardní vstup a výstup 4:2:2 a vnitřní zpracování je také ve formátu 4:2:2, datová rychlost videa je 50 Mb/s, kompresní poměr=165,9 Mb/s/50 Mb/s≈ 3,3:1. MP zajišťuje vysoce kvalitní snímky, a to až 4-kamery mohou nahrávat přenosy a digitální vysílání. přehrávat programové pásky nahrané ve formátu DVCPRO ve formátu DVCPRO.

Formát DigitalDigital-S(D9).

Thisformatvideorecorderuses4:2:2format8bitquantizationprocessing,andusesDCT-basedintra-framecodingand50Mbpsvideobitrate,The3:1compressionratiomeetstheinternationalprofessionalstandardofCCIR601analogsignaldigitization,ensuringthehighdefinitionandcoloreffectoftheimageaftermulti-generationcopying.Use1/2inchhighdensitymetalcoatedtape.

Function

Thevideorecorderisarecordingandplaybackdeviceinaclosed-circuittelevisionsurveillancesystem.Itrequiresaverylongrecordingtime.Mostvideorecordersdedicatedtosurveillancesystemscanrecord24H~960Hvideo.Inaddition,thevideorecordermustalsohavearemotecontrolfunction,sothatthevideorecordercanbeeasilyoperatedremotely,orthevideorecordercanbeautomaticallyoperatedwithacontrolsignalinaclosed-circuittelevisionsystem.

ThededicatedvideorecorderintheCCTVsurveillancesystemisanintermittentvideorecorder.Ithasavarietyoftimeintervalrecordingmodes.Itcanrecordupto960Hona1/2-inchVHS/E180cassette.Video.Thevideorecorderisequippedwithacharactersignalgenerator,whichcanprintmonth/day/year/week/hour/minute/second/recordingmodeontheimagesignal,andalsoshowthenumberandalarmmodeofthecameraandalarmontheimage.Usingtheautomaticrecordingperiodsettingfunction,youcanprogramtherecordingmodeforeachdayoftheweek.Afterreceivingthealarmsignal,thevideorecorderwillautomaticallyenterthecontinuousrecordingstate,andresumenormalintermittentrecordingmodeifthereisnoalarm.Inaddition,thevideorecorderhasalockprotectionkeytoinvalidateabnormalcommandsandoperations,preventingnon-professionalsanddestructiveoperationsfrominfringingontheclosed-circuittelevisionmonitoringsystem.

Classification

DVRsaremainlydividedintotwocategories,oneisPC-basedharddiskvideorecordersbasedoncomputerarchitecture(alsoknownasindustrialcontrolharddiskvideorecorders),andtheotherisbasedonembeddedIntermsofmarketapplications,thetwotypesofharddiskvideorecorderswithembeddedprocessorshavetheirownmerits.TheearlyharddiskvideorecorderswereallPC-typeharddiskvideorecordersbasedoncomputerarchitecture.Later,themarketshareofembeddedharddiskvideorecordersgraduallyincreased,andthetwowereinthemarket.Theshareisbasicallythesame.

ThedomesticharddiskvideorecorderproductsaremainlymadeinChina.PC-typeharddiskvideorecordershavematuretechnology,buttherearenobrandedproducts.Mostofthemareassembledbyusersorengineersthemselves,andtheentrythresholdofembeddedharddiskvideorecordersHigher,mainlybasedonbrands.PC-typeharddiskvideorecorderscanbesubdividedintotwotypesbasedoncapturecards(alsocalledsoftcompressioncards)andcompressioncards(alsocalledhardcompressioncards).Inviewoftechnicalfactors,embeddedharddiskvideorecordersarestilldominatedbyproductswithlessthan16channelsofvideoinput,andembeddedproductswithmorethan16channelsarestillrare.

Typ PC

Průmyslový počítačPCDVR

IndustrialcomputerPCDVRadoptsindustrialcontrolchassis,whichcanresisttheharshandinterferenceofindustrialenvironment.UsingCPUindustrialintegratedcardandindustrialbackplane,itcansupportmorevideoandaudiochannelsandmoreIDEharddisks.Ofcourse,itspriceistwoorthreetimesthatofageneralcommercialPC.Itisoftenusedinvariousimportantoccasionsandsituationsthatrequirealargenumberofchannels.

CommercialmachinePCDVR

CommercialmachinePCDVRgenerallyalsousesindustrialcontrolchassistoimprovethestabilityandreliabilityofthesystem,andthenumberofvideoandaudiochannelsislessSomealsouseordinarycommercialPCcases.ItusesageneralPCmotherboardandvariousboardstomeettherequirementsofthesystem.Itischeapandadaptabletotheenvironment.Itisoftenusedinvariousgeneraloccasions,andthenumberofimagechannelsisgenerallylessthan24.

ServerPCDVR

ServerPCDVRusestheserverchassisandmotherboard,etc.,anditssystemstabilityandreliabilityarealsogreaterthantheprevioustwoimprove.ItoftenhasUPSuninterruptedpowersupplyandmassivediskstoragearray,andsupportshot-swappableharddiskfunction.Itcanruncontinuouslyfor24hours×7daysforalongtime.Itisoftenusedinspecialapplicationdepartmentswithalargenumberofmonitoringchannelsandveryhighmonitoringrequirements.

Embedded

Embeddedsystemsgenerallyrefertonon-PCsystems,devicesorequipmentthathavecomputerfunctionsbutarenotcalledcomputers.Itisamicro-specialcomputersystemwithstrictrequirementsonfunctions,reliability,cost,volume,powerconsumption,etc.,withapplicationasthecenter,softwareandhardwarecanbecut.Simplyput,theembeddedsystemintegratestheapplicationsoftwareandhardwareofthesystem,whichissimilartotheworkingmodeoftheBIOSinthePC.Ithasthecharacteristicsofsmallsoftwarecode,highautomation,andfastresponsespeed.Itisespeciallysuitableforreal-timeandmulti-taskingrequirements.application.

EmbeddedDVRisanembeddedsystembasedonanembeddedprocessorandanembeddedreal-timeoperatingsystem.Itusesadedicatedchiptocompressanddecompressimagesforplayback.Theembeddedoperatingsystemismainlyusedtocontroltheentiremachine.Andmanagement.ThistypeofproductdoesnothaveasmanymodulesandredundantsoftwarefunctionsasPCDVR.Thesoftwareandhardwarestabilityareplannedduringthedesignandmanufacture.Therefore,thequalityofsuchproductsisstable,andtherewillbenocrashes.Thestoragespeed,resolutionandpicturequalityofthevideoandaudiocompressionstreamhavebeengreatlyimproved.Intermsoffunction,itisnolessthanPCDVR.

TherealizationofthevariousfunctionsofPCDVRrelyonvariousboardstocomplete,suchasvideoandaudiocompressioncard,networkcard,soundcard,graphicscard,etc.Thiskindofplug-insystemisusedinsystemassembly,maintenance,andtransportation.Itispronetounreliabilityproblemsinthemediumandcannotbeusedintheindustrialcontrolfield.Itisonlysuitableforcommercialofficeenvironmentsthatdonotrequirehighreliability.TheembeddedDVRsystemisbuiltonanintegratedhardwarestructure.Theentirevideoandaudiocompression,display,networkandotherfunctionscanallberealizedbyasingleboard,whichgreatlyimprovesthereliabilityandstabilityoftheentiresystemhardware.

Features

DisadvantagesPoorstabilityDVRsoftwareisnotcompatiblewithPChardware,WINDOWSoperatingsystem,andtheWINDOWSoperatingsystemitselfisimperfect,whichcaneasilycausesystemcrashes.TheoperationandmaintenanceofPCDVRproductsrequiresacertaintechnicalfoundation,andtheoperatingsystemsometimes"washesout"somesystemconfigurationsandsoftware,whichmakesmaintenancedifficult.

PCDVR'sdatastorageandoperatingsystemareintheharddisk,nomatterhowencrypted,youcanenterthesystemfromthebottomofthePCtodeleteandmodifytherecordedimagefiles.IfthezerotrackofthePCharddiskfails,theentireharddiskandeventheentiresystemwillbeparalyzed,sothereliabilityofthedatawilldecrease.

Ochrana operačního systému WINDOWS proti vniknutí je velmi špatná. Jakmile dojde k poškození operačního systému (jako je vniknutí virem atd.), bude vážně zasažen celý PCDVR nebo dokonce dojde k havárii systému.

PCDVRboardsaremass-producedproducts,andthequalitycanbeguaranteed,butitisdifficulttoachievestandardizedmassproductionwhenassembledintoDVRproducts,sothequalityofthewholemachineisalsodifficulttoensure.

ThedevelopmentofallkindsofPCaccessoriesisveryfast,andtheoriginalproductswillbeeliminatedin1to2years.ForDVRproductsthatcanonlybeusedforalongtimetoreflectthecost-effectiveadvantage,themaintenancecostofPCDVRishigher.Atthesametime,thePCboardsarenotdesignedandproducedbythemanufacturersthatproduceDVRproducts,andthereliabilityofthelong-termmaintenanceoftheirproductsislow.

Výhody

Velký úložný prostor (snadné rozšíření úložného pevného disku), vhodné pro dlouhodobé nahrávání.

Rozhraní Goodman-stroj a správa souborů atd., každý, kdo použil počítač prostřednictvím myši a klávesnice, může dobře fungovat;

Upgrady softwaru a hardwaru jsou relativně snadné, aktualizace produktu je rychlá.

Maintenancecostisrelativelylow.Generalfaultscanberepairedbyreplacingparts,andthewholemachinewillnotbescrapped.

TherearealsosomemisunderstandingsaboutembeddedDVRintheindustry.Thecompany’sembeddedDVRsolutionsarebasedontheTriMedia1300andpSOSoperatingsystemsprovidedbyPhilips.Therefore,theindustrymistakenlybelievesthattheembeddedprocessorisTriMedia1300,andtheembeddedoperatingsystemispSOS.Therefore,somearticleshavepositionedthestandardfordetectingembeddedDVRs.WhetherTriMediaandpSOSareused.Infact,therearemanyembeddedprocessors,suchas:Motorola's68K,ColdFire,860,8260,variousARMprocessorswithARMasthecore,IBM'sPowerPCseries,TI'sDSPprocessors,commonMCS51single-chipmicrocomputers,etc.areallembeddedProcessor;Therearealsomanyembeddedoperatingsystems,suchas:VxWorksandpSOSfromWindRiver,NucleusfromATI,WinCEfromMicrosoft,andopensourceembeddedLinux.

ThecurrentstatusofembeddedDVRisthatthereareveryfewcompanieswithindependentdevelopmentcapabilities,andtheirtechnicalandfinancialthresholdsarerelativelyhigh.Generallysmallcompanieshavenolow-levelembeddeddevelopmentcapabilities,andusuallyonlyusesomelow-endforeigncompanies.Duetothelimitationsoftheoriginalsolution,thesolutionsoftheoriginalsolutionarenotflexibleenoughtomeetthediverseneedsofcustomers.Somehavenonetworkfunctions,andsomehavenetworkfunctionsbutarenotstrong.

Thehardwareandsoftwaredesignofembeddedsystemsisusuallymoredifficult,butitprovidesuserswiththefollowingbenefits:

Easytouse,noPCoperatingskillsrequired;embeddedDVRoperationsaregeneralOperatethroughthepanelbuttonsorremotecontrol,aslongasyoucanusehomeappliancessuchasDVD/VCD,youwillusetheembeddedDVR,andyoudon'tneedtolearnhowtomovethemouse,double-clickthemouseandothercomplicatedcomputeroperations.

Thesystemhashighstability,andthesoftwareismorefault-tolerant,withoutspecialmanagement.EmbeddedDVRadoptsembeddedreal-timemulti-taskingoperatingsystem,videomonitoring,compression,storage,networktransmissionandotherfunctionsareconcentratedinasmalldevice.Thereal-timeperformance,stabilityandreliabilityofthesystemaregreatlyimproved,sonospecialmanagementisrequired.,Suitableforunattendedenvironment;

ThesoftwareissolidifiedinFLASH/EPROM,whichcannotbemodifiedandhashighreliability.PCDVRsoftwareisgenerallyinstalledontheharddisk,andtheabnormalshutdownofthesystemmaycausethesystemfilestobedamagedorthesystemharddisktobedamaged,whichwillleadtothecrashoftheentiresystemandpoorreliability.ThesoftwareembeddedintheDVRissolidifiedinFLASH/EPROM,thereisnopossibilityofsystemfilesbeingdamagedorharddiskdamage,andthereliabilityisveryhigh.

Usingembeddedreal-timeoperatingsystem,thesystemturnsonandoffquickly.ThedesktopoperatingsystemsWindows,Linux,etc.usedbyPCDVRsrequirealongswitch-offtimeduetotherelativelylargeoperatingsystemkernel.TheembeddedDVRadoptsanembeddedreal-timeoperatingsystemwhosekernelcanbecut,anditskernelcanbeassmallastensofkilobytes.Theloadingoftheentiresystemkernelandtheinitializationofthedevicecanbecompletedinjustafewseconds,andthereisnoneedtoprotectthesystemfiles.Theshutdowncanbecompletedwithin1to2seconds.

Thecostofsoftwareandhardwareislow.EmbeddedDVRadoptsanintegratedhardwarestructure,noneedtobuygraphicscard,memoryandotherequipmentlikePCDVR,andthehardwarecostislowerthanPCDVR.Thesoftwareusesadedicatedembeddedoperatingsystem,andtheuserdoesnotneedtopaythispartofthecost(theequipmentsupplierwillincludethispartofthecostinthedevelopmentcost),andifthePCDVRadoptsthegenuineWindowssystem,thispartofthecostwillbemorethan2,000yuan,ifitisusedForpiratedoperatingsystems,usersmayalsofacelegalactionsbyMicrosoftforinfringementofintellectualpropertyrights.

Themechanicalsizeissmall,andthestructureissimpleandcompact.TheembeddedDVRhardwareadoptsanintegrateddesign,whichisdifferentfromthePCDVRplug-incardstructure;thewholesystemhasasimplestructure,smallsizeandlightweight,anditalsoimprovesthestabilityandreliabilityofthesystem.

Hlavní produkty

Digitální pevný disk

TheharddiskvideorecorderisreferredtoasDVR(DigitalVideoRecorder).,Adoptingharddiskvideorecording,soitisoftencalledharddiskvideorecorder,alsoknownasDVR.Itisacomputersystemforimagestorageandprocessing,whichhasthefunctionsoflong-termrecording,recording,remotemonitoringandcontrolofimages/voice.Asthewaveofdigitaladvancementcontinuestopenetratetheheartsofthepeople,DVRhasbecomethenewdarlingofdigitalsecurityinthenewcentury.DVRapplicationshavedevelopedfromtheinitialfinancialfieldtotransportation,publicsecurity,environment,intelligentbuildings,squares,computerrooms,examinationrooms,etc.Places,aslongasyouwanttouseimagesandsoundformonitoring,youwillthinkofDVRsystems.DVRhasbecomeahotproductinthefieldofvideosurveillance,andithasbecomeabrightspotincurrentsecurityproducts.

InthesecurityindustryIntraditionalvideosurveillanceprojects,tape-typelong-delayvideorecordersarecommonlyused.Thistypeofvideorecorderusestapeasacarrierforstoringvideodata.Videodataisstoredinananalogmanner.Aftermultiplecopiesofthevideosignal,thesignalattenuationisseriousandthevideotapeisoccupied.Alargeamountofstoragespaceistroublesomeformaintenanceanddataretrieval.Withthedevelopmentofcomputertechnology,thetechnicalupdatesofhardwareandsoftwarehaveprovidednewideasforthestorageofvideodata.

Theprocessingpowerofvideodataisnotenough,sothereisnolarge-scaleapplication.Withthedevelopmentoftechnology,ontheonehand,theprocessingpowerofcomputersisgreatlyenhanced,andICtechnologyisalsoadvancingbyleapsandbounds.Possibly.

Developmentstatus

AfterforeignanalogsurveillanceproductsgrabbedtheChinesemainlandmarketinthe1980s,for20years,foreignbrandsandproductshavealmostdominatedtheworld,despitetheparticipationofsomenationalenterprisesThecompetitioninthisindustryhasneverhadtheopportunitytoformthemainstreamofnationalbrands.Withtherapiddevelopmentofdigitaltechnology,thesecurityfieldhasundergoneacomprehensivedigitaltransformation.Since2000,thedigitalsecuritymarkethasdevelopedrapidly,andanumberofdomesticbrandshavebeenborn.Emergingdigitalsurveillanceproductmanufacturers,amongwhichDVRmanufacturersrepresentedbydigitalsecurityproductshaverisenrapidly.Injustafewyears,theyhaveapplieddigitalsurveillancetechnologytoallwalksoflife,contributingtothestabilityandstabilityofthesociety.Thepositivecontributionhasalsocausedfundamentalchangesintheoriginalsurveillancemarket.Analogsurveillanceproductshavegraduallywithdrawnfromthemarket.DVRhasbeenwidelyusedasamajorcomponentofdigitalsecurityengineering,andnationalbrandproductshavegraduallyoccupiedamajormarketshare..

Fromtheperspectiveoftheindustryasawhole,whatthemarketneedsisanintegrateddigitalmultimediamonitoringsystem.Accordingtotheuser’ssecurityrequirements,combinedwithitsowncivildefense,asecurityprotectionsystemthatmeetsactualneedsisformedtoachieveaudiovisualMonitoring,controlandrecordstorage.Intheprocessofmarketpromotion,DVRproductshavebeenpre-designatedbysomemanufacturersastheuniversaldigitalsurveillancecore.However,thecoreproblemofDVRisonlytosolvethedigitalcompressionandstorageofvideo,andthecontentof"control"isrelativelylacking.Inpracticalmonitoringsystems,DVRplaysamoreimportantroleinreplacingtraditionalanalogvideorecorders,andDVRtechnologyisattheinitialstageofthedevelopmentofdigitalmonitoringsystems.

SincethedevelopmentofDVR,thetechnicalimprovementsandsolutionsproposedbyvariousmanufacturersinresponsetothepracticalneedsofthesecurityindustryandspecialapplicationsindifferentplacescanbedescribedasahundredflowersblooming,fromM-JPEG,MPEG-2topopularMPEG-4,H.264compressiontechnology,fromsoftcompressiontohardcompression,thecontinuousincreaseinthenumberofvideochannels(4,9,16,32,etc.),thenetworkfunctionsofthesystem,etc.,aredazzling.Withvariousapplicationenvironments,DVRproductshavedevelopeddifferentseriesofproducts.Therearevariousbrandsandmodelsonthemarketwithdifferentfunctionalcharacteristics.Ingeneral,accordingtothesystemstructure,itcanbedividedintotwocategories:PC-basedDVRwithPCarchitectureandembeddedDVRwithoutPCarchitecture.PC-styleDVR

TheDVRofthisarchitectureusestraditionalPCasthebasichardware,Win98,Win2000,WinXP(andasmallamountofLinux)asthebasicoperatingplatformsoftware,andisequippedwithimagecaptureorimagecapturecard,Compilethesoftwaretobecomeacompletesystem.ThePCisauniversalplatform,andthePChardwareisupdatedquickly.Therefore,theperformanceofthePC-styleDVRiseasiertoimprove,andthesoftwarerevisionandupgradearealsomoreconvenient.

AttheendofJuly2016,theworld’slastvideorecordermanufacturer,FunaiElectronicsCo.ofJapan,announcedthatitwouldstopproducingvideorecordersduetolowsales.

Instructionsforuse

Becausethevideorecorderisaprecisionelectronicdevicewiththeessenceofelectricity,magnetismandmachinery,itcanbekeptingoodworkingconditiononlyifitisusedcorrectlyandreasonably,anditcanbeusedforextendedperiodsoftime.Life,reducetheoccurrenceoffailures.Whenusingavideorecorder,youshouldgenerallypayattentiontothefollowingpoints:

1.Familiarizewiththeinstructionmanual.Donotusethenewlypurchasedvideorecorderorthefirst-timevideorecorderinanemergency,becausetherearemanytypesofvideorecorders,andtheoperationandusemethodsofvariousmachinesTherearealwayssomedifferences.Therefore,youshouldfirstreadtheinstructionmanualcarefully,clarifythefunctionsandconnectionmethodsoftheswitches,buttons,inputandoutputjacks,andoperatestrictlyinaccordancewiththemethodsspecifiedintheinstructionmanualtoensurethenormaluseofthemachine.Otherwise,notonlymaythemachinenotworkproperly,butalsothedangerofdamage.

2,checkthepowersupplyvoltage,checkwhetherthepowersupplyvoltageofthevideorecorderisalignedwith220V.Whenadjustingthevoltageselector,youmustturnoffthepowerofthevideorecorderandunplugthepowercordfromthepowersocket.Somevideorecordersuseswitchingstabilizedpowersupply,andthevoltagecanbeappliedbetween110-240V,sothereisnoneedtoadjust.

3.Agooduseenvironmentandenvironmentalconditionsdirectlyaffecttheservicelifeofthevideorecorder.Thevideorecordershouldbestoredandoperatedinadry,ventilated,dust-freeenvironment,awayfromvibrationsourcesandstrongmagneticfields.Thevideorecordershouldbeplacedinastableplacetoavoidstrongvibrationandimpact;itshouldalsobeplacedinaventilatedplacetoavoidhightemperatures,notinahumidanddustyplace;itshouldbeplacedasclosetothemonitoraspossibletoshortenthetransmissioncableLength,reducesignallossandexternalinterference.Donotplacethevideorecordernearastrongmagneticfield,becauseworkingunderastrongmagneticfieldwillaffecttheuseeffect,anddonotplaceitneardiluteorvolatilechemicalssuchaspetroleumspirits,alcohol,etc.

Často kladenéOtázky

Otázka 1: Když se spustí hostitel, nastane fenomén alarmu reproduktoru podvozku. Jak to posoudit a řešit?

ItwillbeissuedwhenthehostisstartednormallyAshort"di",ifthelong"di"beepscyclically,thenthememoryshouldnotbedetected.Mostofthememoryisnotinstalledorthememoryisdamagedandthememoryneedstobereplaced;ifitisonelongortwoshortbeeps,Itshouldbethatthegraphicscardisnotpluggedinwellorthegraphicscardisbrokenandthegraphicscardneedstobereplaced;whenthesystemisrunningnormally,ahigh-frequencyalarmsounds,thenitshouldbethattheCPUisoverheated,theCPUfanisnotgoodforheatdissipation,andtheCPUfanneedstobereplaced.ThehostworkingenvironmenttemperatureistoohighforventilationIftheconditionsarenotgood,itisalsopossiblethattheCPUalarmtemperaturesettinginthemotherboardBIOSistoolowandneedstobeadjustedintime.

Question2:Whenthehoststartstoentertheoperatingsystem,themonitorbecomes16colorsandtheresolutionbecomes640*480(theoriginalgraphicscardandvideocapturecardhavebeeninstalledwithdrivers)

Thisisbecauseavideocapturecardisdamaged.Thevideocapturecardandthegraphicscardconflict,youneedtoreplacethecorrespondingvideocapturecardandre-drivethegraphicsdriver.

Otázka 3:Nelze použít klávesnici a myš, jak ji posoudit a vypořádat se s ní?

Ifthekeyboardandmousecannotbeusedatthesametime,itislikelythatthekeyboardlock(KB-LK)isturnedon,checkthekeyboardlock(KB-LK)Isthelighton?Ifit’son,itmeansthekeyboardislocked,justturnitoff;ifonlyoneofthekeyboardandmousecannotbeused,youneedtocheckwhetherthecontactisgood,ifitstillcan’tbeused,thereisThekeyboardandmousemaybedamagedorthereisaproblemwiththemotherboardinterface.Replaceitwithagoodkeyboardandmousetofindtheproblem.

Question4:Whenenteringthesystem,thesystemsuddenlybecomesveryslow,andthesoftwareisrunningWhenIturnonmycomputer,itwillbeveryslow.Howtojudgeanddealwithit?

Ifyoucanenterthesystemnormally,butitisveryslow,firstrestorethesystem(selectmicrosoftwhenthesystemstarts)Windowsandenter,thenenterd:,thenpressenter,thenentercdsetup,pressenter,andthenenterhftoenterthesystemtorecover).Iftherecoveryisstillveryslow,itshouldbeahardwareproblem.Verygood.Itmaybethattheharddiskisbroken.Youneedtofindthedamagedharddiskandreplaceitintime.Itmayalsobethattheharddiskisaddedandthepowersupplyisnotenough.Youcanreplacethepowersupplywiththecorrespondingpoweraccordingtothesituation.

Otázka 5: Hostitele nelze zapnout, jak to vyřešit?

Firstly,ifthemonitorisnotdamaged,judgewhetherthepowersupplyisnormal,thatis,whetherthepowerlightison,ifitisnormal,thenobservewhetherthehostisemittingIfthereisalongbeep,onelongbeep,ortwoshortbeeps,itmeansthatthememoryorgraphicscardisnotworkingproperly.PleaserefertoQuestion1tosolveit;ifthereisnobeep,thenitshouldbethepowersupply,motherboardorCPU.Ifthereisaproblemintheprobabilityofaproblem,thereplacementmethodshouldbeadopted(thatis,thesuspectedproblemcomponentisreplacedwiththeconfirmednormalcomponent,andtheproblemcomponentischeckedonebyone)tofindtheproblemcomponentandreplaceit.TheoperatingfrequencyoftheCPUisnotthedefaultoperatingfrequencyofthecurrentCPU.YouneedtoentertheBIOStoadjusttheCPUfrequencytothecurrentoperatingfrequency.

Question6:OnlytheXunhuilogoappearsonthescreenwhenthesoftwareisstarted,andtherearesixlettersxunhuibelowandnoimagesignal

ThisisthetypeofvideocapturecardselectedwhenthesoftwareisstartedIncorrect,aslongasthecarddriverisadjusted,thecardcanbedisplayednormally(double-clicktoopentheXHDVR-2004.INIfileintheWINNTdirectoryoftheCdrive,andchangethe1inAutoSelect=1to0toreselectthecardwhenthesoftwareisstarted.);Orthevideocapturecarddriverisnotinstalledcorrectly,youneedtoinstallthecorrespondingdriverandthenrestartthehost.

Question7:Whenthesoftwareisstartedorused,achannelwithanimageappearscompletelyblack,anditiscompletelyblackwhenthevideosignalisnotconnected(therearenofivewordswithoutvideosignal)HengyicardsaremoreThisproblemoccurs;orthecolorimagesignalisblackandwhitewhenthechannelmonitoringparametersarenotadjusted.

Thisisbecausethevideocapturecardisdamaged,andtheproblemcanbesolvedbyreplacingthecorrespondingvideocapturecard.

Otázka 8: Pokud se při vstupu do softwaru setkáte s blikající obrazovkou,

Itmaybethatyoudidnotexitthesoftwarenormallyandrestartthehost;ifthephenomenonstilloccursafterrestarting,thenitshouldbecausedbythegraphicscard.Theproblemshouldbereplacedbythegraphicscardintime.

Otázka 9: Při nastavování rozvrhu se vyskytuje několik malých problémů, kterým je třeba věnovat pozornost.

Whensettingmultipletimerecordingsindifferentrecordingmethods,itshouldbenotedthatthesoftwareisrecordingina24-hourmanner,sothestarttimemustbelessthantheendtimewhensettingtheschedule.Ifthesettingof24pointsisexceeded,itneedstobesetintwoperiods(forexample,18.00.00to23.59.59,then0.00.00to7.59.59).Mobilealarmrecordingandalarmrecordingneedtobearmed(includingmanualarmingandarmingaccordingtoschedule),andcontinuousrecordingisnotrequired.

Question10:Whentherecordingmodeisset.Butafteraperiodoftimecannotberecordednormally,howtoeliminateanddealwithit?

Ifallchannelscannotrecord(inthechannelrecordingcontrol,allchannelsarenotintheyellowlightstate.)oritisdisplayedastherecordingstate,buttherecordingfilecannotbegeneratedintheharddisk,thenitshouldbeharddiskgroupingIfsomethinggoeswrong,youneedtoregrouptheharddisksandrestartthesoftware.Iftheproblemisstillnotsolved,allchannelsarestillblue,andthevideofilescannotbedeletedwhenenteringtheoperatingsystem.ThenthepermissionsoftheharddisksshouldbechangedandyouneedtochangeAdjustthepermissionsoftheharddiskback.

Ifitisanalarmrecording,suddenlyoneormorechannelscannotrecordalarms.First,checkwhethertherecordingmodeissetcorrectly.Ifthesettingiscorrect,checkwhetherthedetectionareaof​​thechannelhasbeenchangedbysomeone.Ifitischanged,thedetectionareaof​​thechannelneedstobemodifiedagain,andthenrestartthesoftware.

Otázka 11: Při používání zařízení PTZ jej nelze normálně ovládat, jak jej posuzovat a řešit.

Firstofall,checkifthePTZprotocol,addresscodeandbaudratearethesameastheinstructions.Iftheyareallset,butthePTZcan’tstoprotatingduringcontrol(thenormaloneistoclick,Itrotatesabit.)Thenthereshouldbeaproblemwiththedevice,andthePTZdeviceneedstobereplacedintime.WhenmultiplePTZsareused,theycannotbecontrollednormally.Thenseeifthemodule(232to485)canbedriven.

Otázka 12:Při použití síťového terminálu jej nelze monitorovat.Jak s tím naložit?

Firstofall,wemustunderstandthatthereareseveralconditionsthatneedtobemettousethenetworksidemonitoring,whetherthenetworksidesettingsaresetup,andwhetherthenetworkissmooth?Forexample,arethe21portsrequiredbytheInternetaccesssoftwareoftheroutermappedtothehost?IsthereafixedIPordomainname?Ifitisalocalareanetworkmonitoring,aslongasitissetupandthenetworkisunblocked(ifthenetworkisnotunblocked,checktheline)andthemaincontrolterminalisopen,youcanmonitor.IfitisWANmonitoring,inadditiontothenetworksideneedstobesetup,seeifthehostcanaccesstheInternet?Ifyoucan'tgetit.CheckwhetherthegatewayandDNSsettingsarecorrect(wherethegatewayandDNSshouldbetheIPoftherouter)?Thenseeiftheroutercanmaptheporttothemonitoringhost?AfixedIPordomainnameisessential.Aslongasseveralconditionsaremet,thereisnoproblemwithmonitoring.

Otázka 13:Stroj se automaticky spustí

Thisphenomenoniscausedbytheuserperformingsomeabnormaloperations,andthecumulativeeffectcausestheWindowssystemtocrash,andthemonitoringhosthasacrashprotectionfunction,namelyRestarttheWindowssystem;inaddition,themachineisplacedinpoorventilationconditions,whichdamagesthechassisorCPUfan,resultingininsufficientheatdissipation,causingthemonitoringhosttocrash.Solutionsuggestions:uninstallthesoftware,andthenreinstallthemonitoringsoftware;improvetheventilationconditions,andreplacethedamagedfan.

Otázka 14: Software nelze provozovat

Whenloggingin,Ididnotenterthecorrespondingusernameandpassword;orIpressedthelogoutbutton.Pleaseclickthere-loginbutton,enterthecorrespondingusernameandpasswordtologin.

Otázka 15:Obrázek kanálu je po spuštění velký obrázek.

Thismeansthatthesystemcannotdetecttheexistenceofanaudioandvideocompressioncard.Itmaybethatthereisnoaudioandvideoinstalledonyourmachine.Compressioncardorincorrectdriverinstallation,inaddition,someindustrialcomputermotherboardsandcompressioncardcompatibilityisnotgood,thisphenomenonmayalsooccur.Solutionsuggestion:Pleaseruleoutthesepossibilities.

Question16:Thenumberofchannelsisnormal,butthescreenofeachchanneldisplaysmagenta

Upravte prosím barvu atributu zobrazení na ploše na 32bitovou barvu.

Otázka 17: Okamžitě spustí úložiště softwaru

Theprobabilityofthiserrorisextremelylow,anditwillnotappearonaproperlymanagedhost.Ingeneral,thereasonsforthisfailureareasfollows:1)Theuser'shostisoftensuddenlypoweredoff;2)Thesoftwarehasbeenrunonamachinewithextremelyunstablehardwareconfigurationformanytimes.Solutionsuggestion:Checkthehostconfigurationandrestartthesoftware.

Otázka 18: Nahrávání vytváří velké soubory

Thissystemfaithfullyrecordsthevideoandaudiosignalsgeneratedbytheboard,andusesexcellentcompressionalgorithmstoensurethatnokeyimageislost.Ensurethereal-timeperformanceofthevideofileplayback.Theusercancalculatetheframenumberofthequestionablevideofilethroughthespecialplayerofthissystem.Generally,thedefaultfilesizeofthesystemisbasicallynormalwithin120M/hour.Ifthelistedconditionsarenotwithinthese,itcanberegardedasabnormal,andyoucanstartfromthefollowingaspects:1.Observethecorrespondingchannelpreviewimage,thepictureshouldbesoft,clear,noflare,andnotdazzling.Ifthereareabnormaldazzlinghighlightsorevenlydistributedsnowflakeflaresontheimage;thisindicatesthattheoriginalvideosignalhastoomuchnoise,pleaseconsideradjustingorreplacingthecamera;2.Thevideoqualityissettoohighandthemovementistooviolent.Thevideoqualitycanbeloweredappropriately.

Otázka 19:Během přehrávání videosouboru jsou odstraněny mozaiky

Whetherthehostisseverelylackinginresourcesduetootherreasons.Forexample:thehostiscurrentlyperformingamulti-channelplaybackoperationthatexceedsthesystemcapacity.Oncethehost'sresourcesareexhaustedandthevideodatacannotbedecodednormally,mosaicsmayoccur.

Otázka 20:Náhled na straně sítě má smysl pro animaci

Thenetworkcommunicationbandwidthisnotenough.Atthistime,thevideoqualityofthehostsidecanbeappropriatelylowered.

Průvodce výběrem

Videorekordéry

Videorekordéry jsou rozděleny podle nahrávacího času, který lze rozdělit na 24 h, 48 h, 72 h, 96 h, 120 h, 240 h, 480 h, 720 h, 960 různých typů.

Digitální harddiskvideorekordér

Metody komprese signálu digitálního pevného disku videorekordéru zahrnují MPEG-1, MPEG-2, MPEG-4, JPEG a M-JPEG.

(1)Záznamová rychlost metody komprese signálu MPEG-1 a MPEG-2 je větší než rovna 25 snímkům za sekundu (záznam v reálném čase).

(2)Záznamová rychlost metody komprese signálu JPEG a M-JPEG je asi 10 snímků za sekundu (nezáznam v reálném čase).

Klíčové body pro výběr videorekordéru

(1)Je k dispozici pro přerušované nahrávání a přehrávání v reálném čase standardní rychlostí a vícenásobnými volbami.

(2)Ithasthefunctionofstartingandstoppingrecordingaccordingtothespecifiedtime,andisequippedwithadateandtimeandcamerapositioncodegeneratortorecordthedate,timeandpositioncode,andcanbedisplayedonthemonitor.

(3)Podle požadavků záznamu v reálném čase nebo jiných požadavků na záznam v reálném čase vyberte metodu komprese signálu digitálního pevného disku videorekordéru a kapacitu pevného disku.

(4)Thedigitalharddiskvideorecordercanselecttechnicalindicatorssuchasscreendivisionprocessing,cameracontrol,andalarmlinkageaccordingtotheneedsofsystemfunctions.