User guide

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ReliableUDP).Burstandgapstatisticsprovidevaluable
insightintothetimedistributionoflostanddiscardedpackets.
MPEG-TS Packet Loss Metrics
Metric Description
PacketLossRate PercentageofMPEG‐TSpacketslostinthenetwork
PacketDiscardRate Percentageofpacketsdiscardedduetolatearrival
OutofSequencePacketRate Percentageofpacketsarrivingoutofsequence
DuplicatePacketRate Percentageofduplicatepackets
BurstLossRate Percentageofpacketslostwithinburstperiods
BurstLength Averagelengthofburstperiods
GapLossRate Percentageofpacketslostwithingapperiods
GapLength Averagelengthofgapsbetweenbursts
PCR(ProgramClockReference)JitterMetrics
Metric Description
PCRJitter ProgramClockReferenceJitter
MDI(MediaDeliveryIndex)Metrics
Metric Description
MDIDelayFactor MediaDeliveryIndexDelayFactoristhemaximumdifference,observed
attheendofeachmediastreampacket,betweenthearrivalofmedia
dataandthedrainofmediadata
MDIMediaLossRate MediaDeliveryIndexLossRateisthecountoflostorout‐of‐orderpackets
carryingstreamingapplicationinformationoveraselectedtimeinterval,