ITU-T G.107 (04/2009)

1 General
1.1 Scope
1.2 References
2 The E-model, a computational model for use in transmission planning
2.1 Introduction
2.2 Source code
3 The structure and basic algorithms of the E-model
3.1 Calculation of the transmission rating factor, R
3.2 Basic signal-to-noise ratio, Ro
3.3 Simultaneous impairment factor, Is
3.4 Delay impairment factor, Id
3.5 Equipment impairment factor, Ie
3.6 Advantage factor, A
3.7 Default values
Annex A – Conditions of using the E-model
A.1 Examples of conditions where caution must be exercised when using the E‑model
A.2 Conditions for which the performance of the E-model has been improved by updating from the earlier version
Annex B – Quality measures derived from the transmission rating factor R
Appendix I – Calculation of R from MOSCQE values
Appendix II – Provisional impairment factor framework for wideband speech transmission
Appendix III – Reference Implementation of the E-model in G.107
Bibliography Electronic attachment – E-model in PHP4 scripting language

Recommendation ITU-T G.107 gives the algorithm for the so-called E-model as the common ITU‑T transmission rating model.