EXFO EXpert IPTV Test Tools (FTB-1 / 2 Pro) - Manual (Page 80)

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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,