Exfo EXpert IPTV Test Tools (FTB-200v2) Uživatelský manuál

User GuideIPTV Test Tools for FTB-200EXpert IPTV Test Tools

10C hapter1IntroducingtheEXpertIPTVTestToolsTheEXpertIPTVTestToolsisasoftwareFTB‐200basedIPTVqualityanalyzer.Itconsistso

11WhenusedasapassivemonitoringdeviceTheEXpe rtIPTVTestToolsisconnectedviaamanageableswitchoraggregatingtaptomonitorbidirectio

ThewithexamplebelowhindividualprevishowsTheEXperiewscreens.12rtIPTVTestToolsduringanalysissoffourIPTVstreeams

13Conventions Beforeusingtheproductdescribedinthisguide,youshouldunderstandthefollowingconventions: WARNING Indicatesapotentiallyha

14C hapter2 SafetyInformationSafety Information Laser Safety Warnings WARNING Donotinstallorterminatefiberswhilealaser sourceisactiv

15C hapter3 GettingStartedTheEXpertIPTVTestToolsapplicationispreinstalledontheFTB‐200.IfTheEXpertIPTVTestToolsisnotinstalled,

16C hapter4 PhysicalInterface TheEXpertIPTVTestToolsusestheGigEportoftheFTB‐200.Ethernet10/100/1000Mbits/sEthernetPort

17C hapter5 UsingtheGraphicalUserInterfaceThischapterdescribesthegraphicaluserinterfaceofyourExpertIPTVTestToolsapplication.Th

Chap6.1STheExpeChangingfollowing MAC Stati orD ChanThedefa LP N I D6.2SFpAVTomter6SSetupInterfertIPTVTestToogthesedef

TttciparaUprfE6.3MClickChanandonMchanThesecolorcodethresholdswillthtriggerthecorrespondingflantheSummarypan.Uncheckinganypar

2Copyright©2011-2012EXFOInc.Allrightsreserved.Nopartofthispublicationmaybereproduced,storedinaretrievalsystemortransmittedin

 Enl SMoForM ENMa PEnterNewGroupnameasachannlist.SelecteitherMulticastchanneorVoDstreams.MulticastchanneEnterNewChannNumber,

WhenGrextensioGroupscwiththis T“ta Troupsareexporton“.ExfoChannelcanbeimporteds“.ExfoChannels”ToimportaGrou“ImportallGroupthe

22C hapter7 RunningIPTVTests7.1  SimultaneousTestingofMultipleChannels7.2  PassiveTestThePassiveTestallowsmonitoringof

23 Clickonthechanneltoseeitscurrentmetricsandpreview Channelwhosemetricsandpreviewarecurrentlydisplayedisunderlined Tovi

247.3 SetTopBoxEmulationTestTheSetTopBoxEmulationTestallowsIGMPorRTSPjoin&leaverequeststooneormultipleIPTVstreams.

25ForVoDstreams(uri’s): ChoosetheRTSPuritobetestedfromtheChannelListintheSTB ClickonPlaybuttonofthechosenchannelint

26C hapter8 GettingIPTVMetricsThechannelwhosemetricsarecurre ntlydisplayedisunderlinedintheTestLog.8.1  BasicIPTVM

27 CheckSummarymetricsforaquicksignalquality.SummaryprovidesalistofindustrymostusedparametersforquickevaluationofIPTVservice

288.2 LiveStreamPreview VideoandAudiopreviewofthechannelwhosemetricsarecurrentlydisplayedcanbeenabledatanytimeinthemaint

298.3 AdvancedIPTVMetricsTest8.3.1 VideoPerceptualQualityMetricsAsdescribedinthetechnicalreferencesection AppendixA.1,thePer

3LicenseAgreementandWarrantyIMPORTANT:CAREFULLYREADTHEFOLLOWINGLICENSEAGREEMENTBEFOREOPENINGTHISINSTALLATIONPACKAGE.BYOPENINGTHIS

30Definitions:Video Video Perceptual Quality Metrics Instantaneous Absolute MOS 1.0-5.0 The instantaneous absolute Video Mean Opinion Score, a 1-5

318.3.2TransportPacketMetricsTransportPacketsareMPEG‐TSpacketsthatcarryPacketElementaryStream(PES).Statisticsoft

32Definitions:Tab Category MetricName Range DescriptionPackets Video Transport Packet Metrics Packets Received NA Number of video transp

338.3.3. MPEG‐TSTR101290Priority TR10129

34Definitions:MPEG_2TransportStreamTR101290Priority1MetricsTR101290 TR101290Priority1TransportStreamSyncLossCountNA Numbero

358.3.4 AudioDescriptionandPerceptualMetricsInformationAudioDescriptionInformationissimilartoVideoDescriptionInformationp

36Definitions:Audio AudioDescriptionInformationIPSourceAddress NA ThestreamsourceIPaddressIPDestinationAddress NA Thestreamdest

378.3.5  VideoFrameMetrics VideoFrames(MPEG‐TS)statisticsprovidethetotalnumberofReceivedandImpairedframesI,P,Bando

38Definitions:VideoFramesVideoFrameMetricsIFramesReceived NA NumberofIFramesreceivedIFramesImpaired NA NumberofIFramesimpair

398.3.6. VideoBandwidthDefinitions:VideoBandwidthVideoBandwidthMetricsIframeAverageVideobandwidthMb/s Theaveragebandwid

42.GRANTOFLICENSE:EXFOgrantstoyou,thepurchaseroftheenclosedSoftware,alimited,restricted,non‐exclusivelicense.YoushallusetheSo

408.3.7MetricsinGraphicalForm‐HistogramsAnytwometrciscanbedisplayedashistogramsallowingcorrelationofeventsfordiagnostics.

41C hapter9 GeneratingandViewingTestResults9.1 TestResultsLog9.1.1 AccessingTestResultsAccesstotheTestResultsisavailablefro

TestResbyResubthefolloultsgeneratedultsbuttonorbuttonproduceowinglog:42DsepscmfrDouble‐clickingonelectedtestrecoprod

• TrbtrgTogenerateapdreportclickonbuttonandwaittheSummaryPDreporttobegenerated.dfforDF43HereisChartsthesinsan

Therepobelow:ortstartwiththeesummarypagef44followedwithteestmetricsfourppageslongasshoown

45

46

47AppendixA TheIPTVVideoStreamissubjectedtomultilevelanalysisasshownhere:A.1 UnderstandingIPTVVideoPerceptualQuality

48causeobviousdistortionormaynotevenbenoticedbytheenduser,dependingonwhichvideoframetypesareimpaired.Inaddition,impairment

49Asaframeoftenspansmultiplepackets,andatypicalvideostreamincludesinterpolatedframes(P‐framesandB‐frames),agivenpacketlossrate

55.TERMSOFTERMINATION:ThisAgreementshallremaininfullforceandeffectuntilyoudiscontinueuseoftheSoftwareorthe Product,untilthe

50Forinter‐frameormotion‐basedcoding(PandBframes),motionvectorsaredeterminedforeachblockandencoded.Asforintra‐framecoding,err

51A.1.1.2 ImpactofPacketLossonSpecificVideoCodecsAsshowninFigure2‐3,asimplenon‐robustvideostreamcanbeseverelydegradedwith

52Interleaving‐inwhichthevideostreamissplitintoalternateframesandeachencodedseparatelyMacro‐blockerrorconcealment‐spatia llyco

53(PSNR)valuefortheframecanbecomputedbyPSNRbr=‐10log10MSEbr.Figure2‐4showstheestimatedPSNRvalueoncodingbitrateforMPEG‐2

54Figure2‐5StillframefromMPEG‐2videosequenceencodedat5000KbpsFigure2‐6.StillframefromMPEG‐2videosequenceencodedat

55A.1.2.2 PerformanceofVideoCodersTherearemanystandardizedvideocodingalgorithms,suchasITU‐TH.261,H.263,H.264,ISO/IECMPEG‐1,MP

56videoatagivenbitrateundernolosscondition,aswellasunderlossconditionsasdescribedbelow.VQmon/HDautomaticallyadjusts thevideos

57A.2 VQmon/HDQualityAnalysisAlgorithm*ThissectiondescribesVQmon/HD’svideoandaudioqualityanalysisalgorithmsandlistssomeofthe

58Figure2‐7.VQmon/HDvideostreamqualityanalysisalgorithmA.2.1.1 TR101290MetricsCollectionVQmon/HDcollectsandreportsthefull

59A.2.1.4 FrameTypeDetectionVQmon/HDidentifiesindividualI,P,andBframesintheGoPandmeasuresthepacketlossrateandlossdistribut

68.U.S.GOVERNMENTRESTRICTEDRIGHTS:TheSoftwareandDocumentationareprovidedwithRESTRICTEDRIGHTS.Use,duplication,ordisclosurebytheGo

60VQmon/HDcalculatesqualitymetricsintheseburstandgapstates,andthencombinesthemtogeneratetheoverallqualityscoreonuserexperi enc

61Figure2‐8.VQmonFour‐stateMarkovModeldiagram A.2.2 AudioStreamAnalysisVQmon/HD’saudioqualityanalysisalgorithmperformsreal‐

62A.2.3 TelchemyVideoQualityMetricsVQmon/HDprovidesreal‐timeperceptualqualityscores,performancestatistics,andextensivediagnosticd

63TablebelowlistssomeoftheperceptualqualitymetricsreportedbyVQmon/HD,includingacceptablerangesforeach.(Acompletelistanddescript

64 RelativeMOS‐Visanestimatedperceptualqualityscorethatconsiderstheeffectsofcodec/quantizationlevel,theimpactofIPTVimpairments

65bearerchanneltosupportreliablevideo.Thisvideoservicequalitymetricisexpressedintherangeof0.0to50.0,asdefinedin[14].VSTQca

66A.3 IPTVProtocols IPTVusesamultilayerprotocolstacktodeliverthemediacontents. Thefirst3layersaretypicalforIPTVtransmissi

67MPEGframeisfixedat188byte,with184DataPayloadand4ByteHeader.The13‐bitPIDindentifiesPacketElementaryStream(PES).ThePES

68ThePacketizedElementaryStreamisconvertedintotheVideoElementaryStream(MPEG‐2transportstream)

69 PESheadercontaininformationaboutthecontentsofthePESpacket. Variablelengthpacke tstypicallyupto64Kbytebutmaybelonger

7TableofContentsEXFO...

70 ErrorsinPMT,PAT,PID/PSI(PacketIdentifier/ProgramSpecificInformation)Errorswillcausethesettopboxlosecontactwiththestream.Th

71A.5 IGMPLatencyvs.ZaptimeThezaptimeisthetotaldurationfromthetimeviewerpres sesthechannelchangebutton,tothepointthep

72Examples:Inthissectionsometypicalvaluesofzaptimeareshown.Actually,inIPTVtelevisionthesedelaysaregreaterthaninothertechnolog

73ThejoinmessageasksthenetworktosendtherequestedprogramorchanneltotheSTBbyjoiningamulticastgroupcarryingthedesiredbroadcast

74AppendixB TechnicalSpecificationPhysicalLayersSupported‐ 10/100/1000Ethernet,Wi‐Fi802.11b/g/n.RecognizedVideoCompressionStandar

75VideoJitter Frameinterarrivaljitter Iframeinterarrivaljitter Averageframearrivaldelay Peakframearrivaldelay

76VideoFramesI,P,B,SI,SP– Framesreceived Framesimpaired %framesimpaired Packetsreceived Packetlost Packetdiscarded %pack

77TroubleshootingContactingtheTechnicalSupportGroupToobtainafter‐salesserviceortechnicalsupportforthisproduct,contactEXFOatoneof

78Glossary  Perceptual Quality Metrics Metric Description MOS‐V VideoMOS,a1‐5scorethatconsiderstheeffectofthevideocodec,framerat

79 Video Stream Metrics TheVideoStreamDescriptionpr ovidesinformationonthetypeofcodecbeingused,GroupofPicturesstructureandlength,

87.1 SIMULTANEOUSTESTINGOFMULTIPLECHANNELS...227.2 PASSIVETEST...

80Transport Metrics PacketLossMetricsprovideessentialdataonIPTVpacketlossbeforeandaftertheeffectsoferrorcorrection(suchasFECor

81TR101290metricsprovidegreenLEDON/OFFinformationoncertainkeyerrortypesthatoccurwithMPEGTransportprotocols,andareusefuliniden

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9A.2.1.6 PerceptualQualityModel......................59A.2.1.7 VQmonMarko