User guide

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Figure2‐7.
VQmon/H
Dvideo
stream
quality
analysis
algorithm
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A.2.1.1 TR101290MetricsCollection
VQmon/HDcollectsandreportsthefullsetofPriority1and2metricsdescribedinTR
101290forthemeasurementandanalysisofMPEG‐2Transportstreams.
A.2.1.2 PlayoutBufferEmulator
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VQmon/HD’splayoutbufferemulatorcomponentdetectslost,duplicate,andout‐of‐
sequencepacketsandmeasurespacket‐to‐packetdelay(jitter)levels,reportingPPDV
(RFC3550)andMAPDV(ITU‐TG.1020).DetailedIPTVpacketloss/discardstatisticsare
provided,alongwithmetricsevaluatingtheeffectivenessofForwardErrorCorrection(FEC),if
used.IfReliableUDPisinuse,VQmon/HDrepor
tstheproportionofretransmittedpackets
andtheimpactonbandwidthduetoretransmission.
A.2.1.3 ContentAnalysis
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VQmon/HDperformshigh‐levelcontentanalysistodetectlevelsofdetail,motion,and
panning,andcanalsodetectsomescenechanges.VQmon/HDalsorecognizesabnormal
contentconditions(includingnocontent,noise/snow,andfrozenimage)andcangenerate
alertsiftheyaredetected.
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