Table of Contents

 1     Scope            
 2     References 
 3     Definitions  
        3.1     Terms defined elsewhere            
        3.2     Terms defined in this Recommendation  
 4     Abbreviations and acronyms 
 5     Conventions
 6     The E-model, a computational model for use in transmission planning     
        6.1     Introduction     
 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 for 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    
Appendix IV - Use of the E-model in conjunction with noise reduction or echo canceller systems in the network or the terminal equipment    
Bibliography