Table of Contents
1Scope
2References
3Abbreviations
4Keyparametersaffectingspeechtransmissionquality
5Definitionofcategoriesofspeechtransmission
quality
6Examplesofspeechtransmissionqualityprovidedin
typicalscenarios
7Qualificationstothedefinitionsprovidedinthis
Recommendation
8Guidancefordetailedtransmissionplanning
AppendixI-TheE-model-basedqualitycontoursforpredicting
speechtransmissionqualityandusersatisfaction
fromtime-varyingtransmissionimpairments
I.1Abstract
I.2TheE-modelreducedtothetransportlayer
I.3Contoursofspeechtransmissionquality(contoursofuser
satisfaction)
I.4Predictingspeechtransmissionqualityfromtime-varying
transmissionimpairmentswiththeuseofqualitycontours
I.5AppendixIreferences Abstract
Specifies five categories of end-to-end speech transmission quality for 3.1 kHz handset telephony. These are defined as ranges of speech transmission quality in terms of "user satisfaction", tied to the ratings given by the transmission planning tool of Recommendation G.107 which takes account of the combined effects of various transmission impairments. The definitions given are independent of any specific technology that may be used in different types of network scenarios under consideration.
