CONTENTS

 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 MOS_CQE values    
Appendix II – Provisional impairment factor framework for wideband speech transmission    
Appendix III – Reference implementation of the E-model in ITU-T G.107    
Bibliography