Exfo EXpert IPTV Test Tools (FTB-200v2) Manual do Utilizador descarregar pdf (Página 63)

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TablebelowlistssomeoftheperceptualqualitymetricsreportedbyVQmon/HD,

includingacceptablerangesforeach.(AcompletelistanddescriptionoftheTVQM

VideoQualityMetricsreportedbyVQmon/HDisprovidedinAppendixC.)

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A.2.3.1 MeanOpinionScores(MOS)

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VQmon/HDreportsestimatedMeanOpinionScores(MOS)forpicturequality

(MOS‐V),audioquality(MOS‐A),andmultimediaquality(MOS‐AV)foreach

monitoredvideostream.MOSscoresrangefrom1to5,with1considered

“Unacceptable”and5“Excellent.”MOSscoresarereportedasinstantaneous(per‐

frame),minimum,maximum,andaveragevalues.IntervalMOSscoresarealso

reportedasinstantaneousandaveragevalues.

Forpicturequality,VQmon/HDreportsbothRelativeMOS‐VandAbsoluteMOS‐V

scores:

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Exfo EXpert IPTV Test Tools (FTB-200v2) Manual do Utilizador Página 63