UNLIMITED FREE ACCESS TO THE WORLD'S BEST IDEAS

close

ITU-T G.107

The E-model: a computational model for use in transmission planning

active, Most Current
Buy Now
Organization: ITU-T
Publication Date: 1 June 2015
Status: active
Page Count: 30
scope:

This Recommendation describes a computational model, known as the E-model, that has proven useful as a transmission planning tool for assessing the combined effects of variations in several transmission parameters that affect the conversational1 quality of 3.1 kHz handset telephony. This computational model can be used, for example, by transmission planners to help ensure that users will be satisfied with end-to-end transmission performance whilst avoiding over-engineering of networks. It must be emphasized that the primary output from the model is the "rating factor" R but this can be transformed to give estimates of customer opinion. Such estimates are only made for transmission planning purposes and not for actual customer opinion prediction (for which there is no agreed-upon model recommended by the ITU-T).

The E-model can be used with confidence for many combinations of high importance to transmission planners, but for some parameter combinations of high importance, E-model predictions have been questioned and are currently under study. Annex A provides further information in this regard.

Document History

ITU-T G.107
June 1, 2015
The E-model: a computational model for use in transmission planning
This Recommendation describes a computational model, known as the E-model, that has proven useful as a transmission planning tool for assessing the combined effects of variations in several...
February 1, 2014
(Pre-Published) The E-model: a computational model for use in transmission planning
This Recommendation1 describes a computational model, known as the E-model, that has proven useful as a transmission planning tool for assessing the combined effects of variations in several...
June 1, 2012
The E-model: a computational model for use in transmission planning Amendment 1: New Appendix IV – Use of the E-model in conjunction with noise reduction or echo canceller systems in the network or the terminal equipment
A description is not available for this item.
April 1, 2009
The E-model: a computational model for use in transmission planning
This Recommendation describes a computational model, known as the E-model, that has proven useful as a transmission planning tool for assessing the combined effects of variations in several...
April 1, 2009
The E-model: a computational model for use in transmission planning
This Recommendation1 describes a computational model, known as the E-model, that has proven useful as a transmission planning tool for assessing the combined effects of variations in several...
June 1, 2006
The E-model, a computational model for use in transmission planning Amendment 1: New Appendix II – Provisional impairment factor framework for wideband speech transmission
A description is not available for this item.
March 1, 2005
The E-model, a computational model for use in transmission planning
A description is not available for this item.
March 1, 2003
The E-Model, a computational model for use in transmission planning Series G: Transmission Systems and Media, Digital Systems and Networks International telephone connections and circuits - General definitions
A description is not available for this item.
July 1, 2002
The E-Model, a computational model for use in transmission planning Series G: Transmission Systems and Media, Digital Systems and Networks International telephone connections and circuits - General definitions
A description is not available for this item.
May 1, 2000
E-Model, a Computational Model for Use in Transmission Planning Series G: Transmission Systems and Media, Digital Systems and Networks International Telephone Connections and Circuits - General Definitions
A description is not available for this item.
December 1, 1998
E-Model, a Computational Model for Use in Transmission Planning - Series G: Transmission Systems and Media, Digital Systems and Networks International Telephone Connections and Circuits - General Definitions
A description is not available for this item.

References

Advertisement