Table of Contents

 1     Scope            
 2     References   
 3     Definitions   
 4     Abbreviations and acronyms  
 5     Conventions
 6     The E-model, a computational model for use in transmission planning         
        6.1     Introduction      
        6.2     Source code      
 7     Structure and basic algorithms of the E-model    
        7.1     Calculation of the transmission rating factor, R        
        7.2     Basic signal-to-noise ratio, Ro       
        7.3     Simultaneous impairment factor, Is            
        7.4     Delay impairment factor, Id          
        7.5     Equipment impairment factor, Ie 
        7.6     Advantage factor, A       
        7.7     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 ITU-T G.107    
Bibliography