Exfo EXpert IPTV Test Tools (FTB-200v2) Instrukcja Użytkownika Pobierz pdf (Strona 29)

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8.3 AdvancedIPTVMetricsTest

8.3.1 VideoPerceptualQualityMetrics

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Asdescribedinthetechnicalreferencesection AppendixA.1,thePerceptualQuality

MetricsarecalculatedontheselectedvideostreamtoprovideMeanOpinionScore(MOS)

andrelatedparameters.

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

VideoPerceptual

Qualityprovidesthe

mostessentialQoE

scoringmetricssucha

VideoMOSscoresthat

resultsfrom

computationofa

complexformula(see

TechnicalOverviewfor

details).

DegradationFactors

provideinsightintothe

natureofMOSscore

degradationbylisting

10contributingfactors

withtheirweight

score.

VideoJitter

Metricsprovide

amountof



AverageFrame

andI‐frameInter

ArrivalJitter



AverageandPeak

FrameArrival

Delayin

milliseconds

VideoScene

AnalysisMetrics

provide

proportionsof

thestreamwith

Detail,Panning,

MotionandStatic

Image.



Thesefactors

weightonthe

overallVideo

MOSscore.

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