Exfo EXpert IPTV Test Tools (FTB-200v2) Manual do Utilizador descarregar pdf (Página 69)

69

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 PESheadercontaininformationaboutthecontentsofthePESpacket.

 Variablelengthpacke tstypicallyupto64Kbytebutmaybelonger

 PTSandDTSallowadecodertoreconstructthevideofromI,BandPframessentby

encoder.

 Ifheaderinformationiscorrupted,entirePESpacketwillbe

lost.

 FixedLengthpackets,multiplexesmanyPESpackets.

 ProgramIdentifier(PID)containsinformationtofind,identifyandreconstruct

programcontents

 ContinuityCounter(CC)–4bitcountertodetectlossoroutofsequencepackets

 ProgramClockReference(PCR)–clockre

ferencetotime

syncthevideoandaudio

 SyncbytesetthestartofaTSpacketandallowssynchronization

 TransportErrorIndicatorindicatesaTSpacketerror

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 PATlistsallprogramsavailableinthetransportstreamwiththeirprogramID(PID).

 EachprogramhasaPMTtha

tliststheelemen

tarystreamsforthatprogram.

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Exfo EXpert IPTV Test Tools (FTB-200v2) Manual do Utilizador Página 69