User guide

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8.3.2TransportPacketMetrics
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TransportPacketsare
MPEG‐TSpacketsthat
carryPacket
ElementaryStream
(PES).
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Statisticsofthese
MPEG‐TSPacketssuch
aslost,discarded,
corrected,out‐of‐
sequenceand
duplicatedpackets
allowdetectionofthis
majorsourceofvideo
picturedegradation.
JitterMetrics
focusonthePCR
Jitterwhichis
definedasTime
Stamparrival
timejitter.
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PCRJitterisa
majorcontributor
tolossofframes
duetorouteror
STBbuffer
overflow.
RTPPacketMetrics(ifavailable)arestatisticsofRTPprotocol
encapsulation.RTPencapsulationisoptionalandisusedtoprovide
independenttimestampingtovideoandaudio.Butitalsoaddsoverhead
tothetransmission.
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TrackingRTPstatisticsallowsproblemisolationtotheRTPencapsulating
device.