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 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����
Appendix IV - Use of the E-model in conjunction with noise reduction or echo canceller systems in the network or the terminal equipment����
Bibliography����