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Work item:
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G.107.1 (ex G.WBEM)
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Subject/title:
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Wideband E-model
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Status:
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Approved on 2011-12-14 [Issued from previous study period]
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Approval process:
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AAP
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Type of work item:
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Recommendation
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Version:
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New
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Equivalent number:
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-
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Timing:
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-
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Liaison:
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ETSI
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Supporting members:
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-
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Summary:
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Recommendation ITU-T G.107.1 gives the algorithm for the wideband version of the E-model as the common ITU T transmission rating model for planning speech services that provide wideband (WB) speech transmission (50-7000 Hz). This computational model can be useful to transmission planners, to help ensure that users will be satisfied with end-to-end transmission performance. The primary output of the model is a scalar rating of transmission quality. A major feature of this model is the use of transmission impairment factors that reflect the effects of different types of degradations occurring on the entire transmission path, mouth-to-ear.
This WB-E-model is an adapted version of the narrowband (300-3400 Hz) E-model, typically referred to as "the E-model", which is described in [ITU-T G.107]. It does not replace the narrowband (NB) E-model. Instead, it describes a separate WB-version of the model that uses, within limits, similar concepts and input parameters as the NB E-model.
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Comment:
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-
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Reference(s):
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Historic references:
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Contact(s):
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| ITU-T A.5 justification(s): |
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First registration in the WP:
2007-06-15 16:25:04
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Last update:
2012-01-17 11:08:07
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