Exfo EXpert IPTV Test Tools (FTB-200v2) Manuel d'utilisateur télécharger pdf (Page 36)

36

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Definitions:



Audio Audio

Description

Information

IPSourceAddress NA ThestreamsourceIPaddress

IPDestinationAddress NA ThestreamdestinationIPaddress

SourcePort NA ThestreamsourceTCP/UDPportnumber

DestinationPort NA ThestreamdestinationTCP/UDPportnumber

Type NA Thestreamtype‐ audio,video,voice

Protocols NA Thestream(s)transportprotocols

CodecType NA Theaudiocodectypefortheaudiostream

NumberofChannels NA Thenumberofaudiochannelsencodedintheaudiostream

erenceClock Hz Thereferenceclock(RTPtimestamporMPT2SPCR/PTS)rate,

inHz

Audio

Bandwidth

Metrics

AverageAudio

Bandwidth

Kbit/s Averageaudiobandwidthinbits/second,excludingtransport

packetoverhead,

FEC,andretransmissions

PeakAudioBandwidth Kbit/s Peakaudiobandwidthinbits/second,excludingtransport

packetoverhead,FEC,

andretransmissions.

AverageReceive

Bandwidth

Kbit/s Averagebandwidthoftransportpacketsreceived,in

bits/second.

PeakReceiveBandwidth Kbit/s Peakbandwidthoftransportpacketsreceived,inbits/second

Audio

Perceptual

Quality

Metrics

MinimalMOS 1.0‐5.0 MinimalAudioMeanOpinionScore,a1‐5scorethat

measurestheimpactoftheaudio

codec,bitrate,samplerate,andpacketlossonaudioquality.

AverageMOS 1.0‐5.0 AverageAudioMeanOpinionScore,a1‐5scorethat

measurestheimpactoftheaudio

codec,bitrate,samplerate,andpacketlossonaudioquality.

MaximumMOS 1.0‐5.0 MaximumAudioMeanOpinionScore,a1‐5scorethat

measurestheimpactoftheaudio

codec,bitrate,samplerate,andpacketlossonaudioquality.

InstantaneousMOS 1.0‐5.0 InstantaneousAudioMeanOpinionScore,a1‐5scorethat

measurestheimpactoftheaudiocodec,bitrate,sample

rate,andpacketlossonaudioquality.

MOSBelowFailed

Threshold

0‐100% TheproportionofthestreamdurationwheretheMOS‐A

valuefallsbelowthe

configuredanalysisthreshold

DegradationFactors:

Loss,Discard,Codec,

Recency

0‐10 Severityofperceptualqualitydegradationcausedby(each

of)thefollowing

factors:packetloss,packetdiscard(jitter),codecdistortion,

andtherecencyof

burstpacketloss.

Tab Category MetricName Range Description

1 2 ... 31 32 33 34 35 36 37 38 39 40 41 ... 81 82

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