ITU P.11:1993
ITU P.11:1993 Effect Of Transmission Impairments
Table of Contents
1Purpose2Effectofindividualimpairments
2.1General
2.2Loudnessloss
2.3Circuitnoise
2.4Side-tone
2.5Roomnoise
2.6Attenuationdistortion
2.7Group-delaydistortion
2.8Absolutedelay
2.9Talkerecho
2.10Listenerecho
2.11Non-lineardistortion
2.12Quantizingdistortion
2.13Phasejitter
2.14Intelligiblecross-talk
3Effectofmultipleimpairmentsandtheuseof
opinionmodels
AnnexATransmissionqualityindex
A.1Introduction
A.2Connectionparametersusedinthemodel
A.3Basicmodelfortransmissionqualityindex
A.4Typicalresults
AnnexBEffectsofattenuationdistortionontransmission
performance
B.1Effectofattenuationdistortiononloudness
andarticulation
B.2Effectofattenuationdistortiononlistening
andconversationopinionscores
B.3Examplesofattenuationdistortion
characteristicseffect
B.4Evaluationmethodusingtheattenuation
distortionunit(adu)
AnnexCEffectsofgroup-delaydistortionontransmission
performance
AnnexDEffectsofcarbonandlinearmicrophoneson
transmissionperformance
AnnexEQuantizingdistortionofdigitalsystems
AnnexFEffectsofnon-lineardistortionontransmission
performance
References