雨课堂学堂在线学堂云《Network Video Surveillance Technology》单元测试考核答案

注：不含主观题第1题多选题(2分)Themainapplicationofnetworkvideosurveillancetechnologyissecurityprevention,whichincludesthemainsecurityelements()AGoalstoprotect/PersoninchargeofsafetBThephysicalpreventionmeasuresofthetargetencirclingCTheextensionmechanismofhumanvisualperception(equipment)DPoliciesandregulations正确答案：ABC第2题单选题(1分)Thespecialfunctionof"piercingeye"inthemythstoryistheremotevideotransmissionfunctioninthenetworkvideosurveillancetechnology.()ArightBrightCfalse3Thespecialfeaturesofthemythicalstory,"thousand-mileeye"and"windaccompanyingear",correspondtotheremotetransmissionofvideoandaudiothatcanberealizedinthewidelyusednetworkvideosurveillancetechnology.(A)Dfalse1.2test第1题多选题(2分)Thecompositionofanalogvideosurveillancesystemsincludes()AVideosignalacquisitionpartBSignaltransmissionpartCSwitchingcontrolpartDDisplayandrecordingsection正确答案：ABCD第2题多选题(2分)Intheswitchingcontrolpartoftheanalogvideomonitoringsystem,itsmainfunctionistoswitchthevideoimageandcontrolthefront-endequipment,mainlyincluding()AMatrixcontrollerBControlkeyboardCControlcodegeneratorDMonitor正确答案：ABC第3题多选题(2分)Thedisplayandrecordingportionoftheanalogvideosurveillancesystemismainlyusedtodisplayandrecordthevideosignaltransmittedbythefront-endcamera,andthedisplayandrecordingequipmentmainlyincludes()AMonitorBMulti-screendividerCMulti-screenprocessorDVideoCassetteRecorder正确答案：ABCD第4题多选题(2分)TheDigitalVideoRecorderismainlycomposedof()AVideocapturecardBCodingcompressionprogramCStoragedeviceDNetworkinterfaceandsoftwaresystem正确答案：ABCD第5题多选题(2分)Theadvantageofthedigitalvideosurveillancephase()ALongrecordingtimeBSupportmultiplesimultaneousrecordingCImagequalitydoesnotdeteriorateovertimeDComplexsystemstructure正确答案：ABC第6题单选题(1分)Innetworkvideosurveillancetechnology,TheabbreviationCCTVisaclosed-circuittelevisionmonitoringsysteminthestageofanalogvideosurveillance.()ARightBFalse第7题单选题(1分)Themainfunctionofthevideosignalacquisitionpartoftheanalogvideosurveillancesystemistocompressandencodetheinformation.()ARightBFalse第8题单选题(1分)Thesignaltransmissionportionoftheanalogvideosurveillancesystemisresponsiblefortheupstreamtransmissionofthevideosignalandthedownstreamtransmissionofthecontrolsignal.()ARightBFalse第9题单选题(1分)Theequipmentthatsimulatesthesignaltransmissionpartofthevideosurveillancesystemincludessignaltransceivers,signalamplifiers,codingcompressionchips,fiberopticcables,andsoon.()ARightBFalse第10题单选题(1分)Digitalvideosurveillancebeganinthe1990swithacoredevice:DigitalVideoRecorder(DigitalVideoRecorder,DVR).()ARightBFalse第11题单选题(1分)TheproductformoftheDVRincludesPCandembedded,wherePCsoftwareisbuiltontheWindows(orLinux)operatingsystem,sothestructureissingleandtheperformanceisstable.()ARightBFalse1.3test第1题单选题(1分)Thefunctionofvideoencodingcompressionalgorithmistoreducetheamountofvideodataunderthepremiseofensuringvisualeffectasfaraspossible,whichisthepremiseofthedigitalizationandnetworkingofvideosurveillancesystem.()ArightBfalse第2题单选题(1分)Thecoreofvideoencodingcompressionisthealgorithm,buttheimplementationofthealgorithmisbasedonthecomputingprocessingchip.Thealgorithmisconstantlyimprovingtoreducetheflowofcodeandimprovetheimagequality,atthecostofimprovingthecomplexityofthealgorithm,butdoesnotrequireimprovetheprocessingpowerofthechip.()ArightBfalse1.4test第1题多选题(2分)Basedontheadventofhigh-definitionnetworkcameras,therearemanyadvantagesovertraditionalanalogcamerasandordinarynetworkcameras,including()AHighdefinition,megapixellevelsensor,andcouldgetmorevideoinformation;BProgressivescanningtechnologycanmakethepictureclearer,naturalandsmoothwithoutdistortion;CDigitalheadcontrolfunction,nomechanicalparts,morestableanddurable;DItcanreplacemanyordinarycamerasforsurveillance,savingcable,installationandmaintenancecosts.正确答案：ABCD第2题单选题(1分)Thecurrentstatusofnetworkvideomonitoringsystemisthatthecodingequipment,platformsoftware,storageandcontrolequipmentofdifferentmanufacturerscannotbeinterconnected,andthesystemneedssecondarydevelopmentandalargenumberoflaterintegration.Therefore,itisurgenttobuildanopenvideomanagementplatformtorealizezerodevelopmentinterconnection.()ArightBfalsetest第1题单选题(1分)Thespecialfeaturesofthemythicalstory,“thousand-mileeye”and“wind-accompanyingear”,correspondtotheremotetransmissionofvideoandaudiothatcanberealizedinthewidelyusednetworkvideosurveillancetechnology.()ArightBfalse第2题单选题(1分)Thespecialfunctionof“piercingeye”inthemythstoryistheremotevideotransmissionfunctioninthenetworkvideosurveillancetechnology.()ArightBfalse第3题单选题(1分)Innetworkvideosurveillancetechnology,TheabbreviationCCTVisaclosed-circuittelevisionmonitoringsysteminthestageofanalogvideosurveillance.()ArightBfalse第4题单选题(1分)Themainfunctionofthevideosignalacquisitionpartoftheanalogvideosurveillancesystemistocompressandencodetheinformation.()ArightBfalse第5题单选题(1分)Thesignaltransmissionportionoftheanalogvideosurveillancesystemisresponsiblefortheupstreamtransmissionofthevideosignalandthedownstreamtransmissionofthecontrolsignal.()ArightBfalse第6题单选题(1分)Theequipmentthatsimulatesthesignaltransmissionpartofthevideosurveillancesystemincludessignaltransceivers,signalamplifiers,codingcompressionchips,fiberopticcables,andsoon.()ArightBfalse第7题单选题(1分)Digitalvideosurveillancebeganinthe1990swithacoredevice:DigitalVideoRecorder(DigitalVideoRecorder,DVR).()ArightBfalse第8题单选题(1分)TheproductformoftheDVRincludesPCandembedded,wherePCsoftwareisbuiltontheWindows(orLinux)operatingsystem,sothestructureissingleandtheperformanceisstable.()ArightBfalse第9题单选题(1分)Thefunctionofvideoencodingcompressionalgorithmistoreducetheamountofvideodataunderthepremiseofensuringvisualeffectasfaraspossible,whichisthepremiseofthedigitalizationandnetworkingofvideosurveillancesystem.()ArightBfalse第10题单选题(1分)Thecoreofvideoencodingcompressionisthealgorithm,buttheimplementationofthealgorithmisbasedonthecomputingprocessingchip.Thealgorithmisconstantlyimprovingtoreducetheflowofcodeandimprovetheimagequality,atthecostofimprovingthecomplexityofthealgorithm,butdoesnotrequireimprovetheprocessingpowerofthechip.()ArightBfalse2.1test第1题多选题(2分)Typicalanalogvideosurveillancesystemstructureincludes()AFrontend:signalacquisitionpartBMiddle:SignaltransmissionpartCBackend:matrixswitchingandcontrolpartDDisplayandvideoparts正确答案：ABCD2.2test第1题单选题(1分)Theangleofviewofthewide-anglelensisabove()A20°B30°C40°D50°第2题单选题(1分)ThemainparametersofthecameraCCDsizereferstothediagonalsizeofthephotosensitivesurfaceoftheCCDimagesensor,theCCDareaisdifferent,thesizeofthephotosensitivepointisalsodifferent.Thephotosensitivepointisresponsibleforphotoelectricconversion.Thelargerthearea,theweakerthesensitivitytolightandthelessrichtheimagehierarchydescribed.()ArightBfalse第3题单选题(1分)Resolutionreferstotheimagequalityindexusedintheprocessofvideorecording,transmissionanddisplay,ortheinherentscreenstructureofthedisplaydevicetoexpressthefinenessoftheimage,thatis,thescanningformatordisplaydeviceofthesingleimagesignalPixelspecifications.()ArightBfalse第4题单选题(1分)0.25Lx/F1.4/50IRE/AGCONmeansthatthelowilluminanceof0.25LxismeasuredwithF1.4luminousfluxlensandvideosignalmeasurementvoltageunder50IRE(350mV)andAGCisON.()ArightBfalse第5题多选题(2分)ThecamerahasavideoamplifierthatamplifiesthesignalfromtheCCDtoa"usablelevel".Automaticgaincontrol()istocontrolthisvideoamplifiertoweakenthesignalunderlowlightandworkunderstronglight,sothatthecameracanworkinalargerilluminationrange.()ArightBfalse正确答案：AB第6题单选题(1分)ThefocallengthofthelensdeterminesthesizeoftheimageformedbythesubjectontheCCD.Theshorterthefocallength,thesmallertheshootingrange,andthelongerthefocallength,thegreatertheangleofviewofthelens.()ArightBfalse第7题单选题(1分)Theselectedlensshouldbeconsistentwiththesizeofthetargetsurfaceofthecamera,andtheCCDofthelarge-sizetargetsurfacecanuseasmall-sizelens,andviceversa.()ArightBfalse第8题单选题(1分)TheC-typelensisequippedwithaC-typecamera,theCS-typelensisequippedwithaCS-typecamera,andtheCS-typelenswitha5mmadapterisequippedwithaC-typecamera.()ArightBfalse2.3test第1题单选题(1分)Thefunctionofthevideodistributorisonechannelofvideoinputandmultiplechannelsofvideooutput,withthefunctionsofimpedancematchingandsignalamplification.()ArightBfalse第2题单选题(1分)Thepowersupplyofthenetworkvideosurveillancesystemgenerallyrequiresthatthepowercordandsignalcordbeasshortaspossible.()ArightBfalse2.4test第1题单选题(1分)Thematrixswitchercanrealizetheselectionandoutputoftheimageofanycameraonanydesignatedmonitor.Throughthekeyboard,youcancontrolthefront-endcamera,lensandauxiliaryequipment.()ARightBFalse2.5test第1题单选题(1分)Themulti-screensplitterstillplaysbackthesplitscreenafterplayback,andthesingle-screenplaybackisasclearastheoriginalimage.()ARightBFalsetest第1题单选题(1分)ThemainparametersofthecameraCCDsizereferstothediagonalsizeofthephotosensitivesurfaceoftheCCDimagesensor,theCCDareaisdifferent,thesizeofthephotosensitivepointisalsodifferent.Thephotosensitivepointisresponsibleforphotoelectricconversion.Thelargerthearea,theweakerthesensitivitytolightandthelessrichtheimagehierarchydescribed.()ArightBfalse第2题单选题(1分)Resolutionreferstotheimagequalityindexusedintheprocessofvideorecording,transmissionanddisplay,ortheinherentscreenstructureofthedisplaydevicetoexpressthefinenessoftheimage,thatis,thescanningformatordisplaydeviceofthesingleimagesignalPixelspecifications.()ArightBfalse第3题单选题(1分)0.25Lx/F1.4/50IRE/AGCONmeansthatthelowilluminanceof0.25LxismeasuredwithF1.4luminousfluxlensandvideosignalmeasurementvoltageunder50IRE(350mV)andAGCisON.()ArightBfalse第4题多选题(2分)ThecamerahasavideoamplifierthatamplifiesthesignalfromtheCCDtoa"usablelevel".Automaticgaincontrol()istocontrolthisvideoamplifiertoweakenthesignalunderlowlightandworkunderstronglight,sothatthecameracanworkinalargerilluminationrange.()ArightBfalse正确答案：AB第5题单选题(1分)ThefocallengthofthelensdeterminesthesizeoftheimageformedbythesubjectontheCCD.Theshorterthefocallength,thesmallertheshootingrange,andthelongerthefocallength,thegreatertheangleofviewofthelens.()ArightBfalse第6题单选题(1分)Theselectedlensshouldbeconsistentwiththesizeofthetargetsurfaceofthecamera,andtheCCDofthelarge-sizetargetsurfacecanuseasmall-sizelens,andviceversa.()ArightBfalse第7题单选题(1分)TheC-typelensisequippedwithaC-typecamera,theCS-typelensisequippedwithaCS-typecamera,andtheCS-typelenswitha5mmadapterisequippedwithaC-typecamera.()ArightBfalse第8题单选题(1分)Thefunctionofthevideodistributorisonechannelofvideoinputandmultiplechannelsofvideooutput,withthefunctionsofimpedancematchingandsignalamplification.()ArightBfalse第9题单选题(1分)Thematrixswitchercanrealizetheselectionandoutputoftheimageofanycameraonanydesignatedmonitor.Throughthekeyboard,youcancontrolthefront-endcamera,lensandauxiliaryequipment.()ArightBfalse第10题单选题(1分)Themulti-screensplitterstillplaysbackthesplitscreenafterplayback,andthesingle-screenplaybackisasclearastheoriginalimage.()ArightBfalse3.1test第1题单选题(1分)Inamultimediasystem,itmustinvolveusingdifferentcolormodelstorepresentthecolorsofanimage.Forexample,theYUVcolormodelisusedforcomputerdisplay,theRGBcolormodelisusedinthecolorTVdigitizationsystem,theCMYKcolormodelisusedforcolorprinting,andsoon.()ArightBfalse第2题单选题(1分)TheRGBcolormodel,thatis,thethreeprimarycolors,8-bitcodingoftheRGBthreeprimarycolorseachconstitutesabout167,000colors,whichiswhatweoftensayistruecolor.()ArightBfalse第3题单选题(1分)TheYUVcolorspaceiscomposedofaluminancesignalYandtwocolordifferencesignalsandchrominancesignalsUandV.TheseparationofY,UandVistorealizethecolorsignalreceivedbyblackandwhiteTV.()ArightBfalse第4题单选题(1分)TheHSLcolormodelreferstothehue,saturation,andbrightnesscolormodels,whereHrepresentsthewavelengthofthecolor,calledHue,whichreferstothepurityofthecolor,orthedepthofthecolor.()ArightBfalse第5题单选题(1分)Thedisplayresolutionofanimageisameasureofthedensityofpixelsthatmakeupanimage.()ArightBfalse第6题单选题(1分)Pixeldepthreferstothenumberofbitsusedbyeachpixelanddeterminesthenumberofcolorsthateachpixelmayhave.()ArightBfalse3.2test第1题单选题(1分)Thepremiseofdatacompressionisthatthereismoreorlessredundantinformationinthedata,andformultimediainformationsuchasvideoandaudio,humanscanusetheirownperceivedredundancy()characteristicstoachieveahighercompressionratio.()ArightBfalse第2题单选题(1分)Humanvisionissensitivetocolorchangesandweaktobrightnessresolution,sovideocodingalgorithmsneedtomakefulluseofthe"weakness"ofthehumaneyefor"deceptive"design.()ArightBfalse第3题单选题(1分)Theprincipleofcodingistoconvertthecodesthatareusedmanytimesintocodeswithalonglength,whilethosewithfewusagescanuseshortercodes,andkeepthecodesonlysolvable.()ArightBfalse第4题单选题(1分)Theprincipleofrun-lengthcodingistoreplaceacontinuousstringwiththesamevaluewithitsstringlengthandarepresentativevalue.Thiscontinuousstringiscalledarun-length.Forexample,aaaaaaaaabbbbbbbbbbccddddeeee,afterencodingis9a10b2c4d4e.()ArightBfalse第5题单选题(1分)TheideaofLZWencodingistobuildastringtableoftheencounteredstrings,eachstringinthetablecorrespondstoanindex,andtheindexofthestringinthestringtableisusedtoreplacetheoriginalstringwhenencoding.()ArightBfalse第6题单选题(1分)Theessenceofdiscretecosinetransformistoconvertasetoffrequencydataintolightintensitydata.()ArightBfalse第7题单选题(1分)TheDCcoefficient()afterthediscretecosinetransformisalsocalledthehigh-frequencycomponentandrepresentssomedetailsoftheimage,notthemostimportantinformation.()ArightBfalse第8题单选题(1分)InJPEGencoding,theDCcoefficientencodingreflectsthemaininformation(averagebrightness)ofthe8*8datablock,andgenerallyhasalargecorrelationwiththeadjacentblock,sotheDCcoefficientisdifferentiallyencoded,andthentheactualvalueandpredictionofthecurrentblockarecalculated.ThedifferenceofthevaluesisfinallyHuffmanencoded.()ArightBfalse第9题单选题(1分)InJPEGencoding,beforetheDCTchangeoftheimage,thecolormodeconversionoftheimageisrequired.JPEGisrequiredtobeperformedintheRGBcolormode.()ArightBfalse3.3test第1题单选题(1分)Spatialredundancyindynamicvideocompressionreferstothelargecorrelationbetweentwoadjacentimagesintheimagesequence.()ArightBfalse第2题多选题(2分)Generally,thevideocodingalgorithmdividestheinputCIFvideointoaseriesof"block"basedhierarchies,including:()APictureBGOBCMBDBlock正确答案：ABD第3题单选题(1分)ThedemandofimageuniversalformatistomakeallkindsofcurrentTVsystems(PAL,NTSC,SECAMimages)canbeeasilyconvertedintoTVphoneimages.()ArightBfalse第4题单选题(1分)CIFformatisbasedonYCrCbcolormode.Thereare352horizontalpixelsand288verticalpixelsincomponentY,CrandCb.()ArightBfalse第5题单选题(1分)Blockisthebasicunitofmotioncompensation.()ArightBfalse第6题单选题(1分)BlockisthebasicunitofDCT.()ArightBfalse第7题单选题(1分)ThestandardresolutionofstandarddigitalpalTVis:()A720×576B720×625C1024×768D1920×1080第8题单选题(1分)Theadvantageofinterlacedscanningisthattheimagedropisnotmuchandthechannelefficiencyisdoubled.()ArightBfalse第9题单选题(1分)Framerateisthenumberofframestransmittedanddisplayedinonesecond.Itcanalsobeunderstoodasthedataflowsizeofvideodatainunittime.()ArightBfalse第10题多选题(2分)Theoutputofthetimedomainmodelistheresidualimageobtainedbysubtractingthecurrentframefromthepredictedframeandthemotionmodelparameters(suchasmotionvector):()AResidualimageBMotionmodelparametersCMotionvectorDDCTquantizationcoefficient正确答案：ABC第11题单选题(1分)Themainfunctionofdynamicvideocompressiontimedomainmodelistoeliminatetheredundancybetweenconsecutivevideoframes.()ArightBfalse第12题单选题(1分)Difference(residualimage)referstothedifferencebetweenthecorrespondingpixelsofthetwoframes.()ArightBfalse3.4test第1题多选题(2分)TheMPEGstandardisaseriesofstandardsformovingimagecompression.Sofar,thestandardsthathavebeendevelopedandarebeingdevelopedare:()AMJPEGcompressionBMPEG-1-DigitalTVstandard,officiallyreleasedin1992CMPEG-2-DigitalTVstandard,becameadraftinternationalstandardin1994DMPEG-4-MultimediaApplicationStandard,releasedin1999正确答案：ABCD第2题多选题(2分)Evaluationcriteriaofvideoimagecodingandcompressiontechnology()ABitrateBReconstructedimagequalityCEncoding/decodingdelayDThecapabilityoferrorrepair正确答案：ABCD第3题多选题(2分)MJPEGencodingcompressiontechnologyisadynamicimagecompressionmethodbasedonthedevelopmentofstaticimagecompressiontechnology,whichcancompresscontinuousvideostreamstoproduceanimagesequence.Itsadvantagesare:()ARelativelysimpletoimplementBEncodingdelayissmallCThepicturecanbesplicedarbitrarily(thepicturedoesnotmatterdirectly)DCanflexiblyadjustthecompressionframerateandresolution正确答案：ABCD第4题多选题(2分)Inordertoobtainhighcompressionratioandhigh-qualityimagesthatcanberandomlystoredundertheconditionofefficientencodingandcompression,MPEGdefinesthreeframetypes,namely:()AI-frameBP-frameCB-frameDT-frame正确答案：ABC第5题单选题(1分)TheI-frameisimplementedusingaJPEG-likecodingmethod.Itdoesnotuseanyotherframeasareference,butonlyperformsspatialredundancycompressionwithintheframe.()ArightBfalse第6题单选题(1分)SincetheI-frameimageneedstorefertootherimageframes,theinformationofthisframeisnotusedforencoding,sotheamountofdataissmall.()ArightBfalse第7题单选题(1分)ThecharacteristicoftheP-frameisthatitistheforwardpredictionresultofthepreviousI-frameorP-frame,anditisalsothereferencereferenceimageforthenextP-frame.()ArightBfalse第8题单选题(1分)P-framecanprovidethehighestcompressionratio.Itcanusethepastimageframe(I-frameorP-frame)orthesubsequentimage(I-frameorP-frame)formotion-compensatedbidirectionalpredictivecoding.()ArightBfalse第9题单选题(1分)Sincethevideoencodingprocessrequiresunidirectionalorbidirectionalreferenceprediction,theorderofimagecompression,transmission,anddisplayisnotconsistent.()ArightBfalse第10题单选题(1分)TheincorrectdescriptionaboutMPEG-1is()AThestandardwaspublishedin1992BItismainlyusedforDVD,MP3musicCMPEG-1usesblockmotioncompensationDMPEG-1usesdiscretecosinetransform第11题单选题(1分)TheincorrectdescriptionaboutMPEG-2is()AItwasreleasedin1994BItisusuallyusedtoprovidevideoandaudioencodingforbroadcastsignalsCMPEG-2isthecorecodingtechnologyofDVDproductsDForwardcompatible第12题多选题(2分)TheincorrectdescriptionaboutMPEG-4is()AItwasreleasedin1998BThecoreofthealgorithmistosupport"content-based"encodinganddecodingfunctionsCItspecifiesnaturalaudioandvideoobjectsDItspecifiesincludingtext,2Dand3Dgraphicsandsynthesizedspeech正确答案：ABCD第13题单选题(1分)BecauseMPEG-4encodeseachobjectindependently,itcanachieveahighcompressionratio,andatthesametime,italsoprovidesthepossibilitytooperatethecontentonthereceivingendasneeded,adaptingtotheneedsof"human-computerinteraction"inmultimediaapplications.()ArightBfalse第14题单选题(1分)TheadvantageofMPEG-4technologyisthatittreatsimagesequally.()ArightBfalse第15题单选题(1分)Thetraditionalvideoencodingmethodistoprocesstheentirevideosignalasawholecontent,whichcannotbedividedanymore,MPEG-4encodingcanachievethecompleteextractionofavideoinformationfromthevideosignal,tomeethumanrecognitionhabitsofvisualinformation.()ArightBfalsetest第1题单选题(1分)Inamultimediasystem,itmustinvolveusingdifferentcolormodelstorepresentthecolorsofanimage.Forexample,theYUVcolormodelisusedforcomputerdisplay,theRGBcolormodelisusedinthecolorTVdigitizationsystem,theCMYKcolormodelisusedforcolorprinting,andsoon.()ArightBfalse第2题单选题(1分)Thedisplayresolutionofanimageisameasureofthedensityofpixelsthatmakeupanimage.()ArightBfalse第3题单选题(1分)Humanvisionissensitivetocolorchangesandweaktobrightnessresolution,sovideocodingalgorithmsneedtomakefulluseofthe"weakness"ofthehumaneyefor"deceptive"design.()ArightBfalse第4题单选题(1分)Theprincipleofcodingistoconvertthecodesthatareusedmanytimesintocodeswithalonglength,whilethosewithfewusagescanuseshortercodes,andkeepthecodesonlysolvable.()ArightBfalse第5题单选题(1分)TheideaofLZWencodingistobuildastringtableoftheencounteredstrings,eachstringinthetablecorrespondstoanindex,andtheindexofthestringinthestringtableisusedtoreplacetheoriginalstringwhenencoding.()ArightBfalse第6题单选题(1分)Theessenceofdiscretecosinetransformistoconvertasetoffrequencydataintolightintensitydata.()ArightBfalse第7题单选题(1分)InJPEGencoding,beforetheDCTchangeoftheimage,thecolormodeconversionoftheimageisrequired.JPEGisrequiredtobeperformedintheRGBcolormode.()ArightBfalse第8题单选题(1分)Spatialredundancyindynamicvideocompressionreferstothelargecorrelationbetweentwoadjacentimagesintheimagesequence.()ArightBfalse第9题单选题(1分)CIFformatisbasedonYCrCbcolormode.Thereare352horizontalpixelsand288verticalpixelsincomponentY,CrandCb.()ArightBfalse第10题单选题(1分)Framerateisthenumberofframestransmittedanddisplayedinonesecond.Itcanalsobeunderstoodasthedataflowsizeofvideodatainunittime.()ArightBfalse4.1-4.4test第1题多选题(2分)ThecorefunctionsofDVRare()ADigitalizationofanalogaudioandvideoBCodecompressionCStorageDNetworktransmission正确答案：ABC第2题多选题(2分)AscanbeseenfromthecompositionofDVR,apartfromthecomputersystemequipmentasthebasicload,suchasCPUandmemory,therearetwomaincorechipsnecessaryforDVR:()AA/DchipBNetworkcardCBack-endprocessingchipDHarddisk正确答案：AC第3题多选题(2分)DVRconfigurationandinterfaceneedtoconsiderthefollowingelements:()ASupportresolutionBNumberandcapacityofharddisksCNumberofvideoinputandoutputDAlarminterface,etc.正确答案：ABCD第4题单选题(1分)ThedifferencebetweenhardcompressionandsoftcompressioninDVRis"whocompletedtheencodingcompression?"Ifitisdonebythehardwarechipontheboard,itiscalledhardcompression.IfitishandedovertotheCPUtocomplete,itiscalledsoftcompression.()ArightBfalse第5题单选题(1分)ThecompressionalgorithmisprovidedbytheASICchipmanufacturerandissolidifiedontheASICchipatthefactory.Ithasadvantagesincostandperformance,butlacksflexibilityandscalability.()ArightBfalse第6题单选题(1分)DSPisageneral-purposemediaprocessor,withsoftwareprogrammablefeaturesthatcanfullysupportavarietyofencodingcompressionalgorithms,butproductexpansionandupgradeismoredifficult.()ArightBfalse第7题单选题(1分)DVRrecordingfilemanagementhastwomanagementmethods:videostreaming(Vtype)andfilepackaging(Ftype).TheefficiencyofVstorageplaybackishigh,butthevideocannotbedirectlyrecognizedbyothercomputerequipment,andthesoftwareneedstobeextractedandconverted.Ftypestorageandplaybackefficiencyispoor,butthestandardformatisused,whichisbasicallyuniversal.()ArightBfalse第8题单选题(1分)DVR'sdiscussiononthenumberofchannelsbelievesthatthemorechannelssupported,thebetter,anditisamanifestationofthemanufacturer'sstrength.()ArightBfalse第9题多选题(2分)ThedescriptionoftheA/DconversiondeviceinDVRiscorrect()AConverttheanalogvideosignalintoastandarddigitalsignalBProvideencodingorcompressionchipDSPorASICforencodingCVideoandaudiorequiredifferentA/DconversionequipmentDThevideoandaudiosignalsmustbesynchronized正确答案：ABCD第10题多选题(2分)ThesoftwarecompositionoftheembeddedDVRincludes()AApplicationsoftwareprogramBOperatingsystemkernelpartCDevicedriverDEncodingcompressor正确答案：ABC第11题多选题(2分)AdvantagesofPC-styleDVR()ACompleteinterfaceBLowdevelopmentcostCShortdevelopmentcycleDPowerfulnetwork正确答案：ABCD第12题多选题(2分)EmbeddedDVRfunctionadvantage()ASmallsoftwarecodeBHighlyautomatedCFastresponseDSuitableforapplicationsrequiringreal-timeandmulti-task正确答案：ABCD第13题单选题(1分)ComparedwithPC-typeDVR,embeddedDVRhasanadvantageinthatithasafriendlyinterface.()ArightBfalse第14题单选题(1分)PC-typeDVRisequivalenttoPCplusvideocapturecard.()ArightBfalse第15题单选题(1分)TheembeddedDVRisstable.TheoperatingsystemandsoftwarearesolidifiedinFlashorROM,thereisbasicallynopossibilityofsystemfiles