TR 103 121-2013 Speech and multimedia Transmission Quality (STQ); Adaptation of the ETSI QoS Model to better consider results from field testing (V1.1.1; Includes Diskette)
ETSI - European Telecommunications Standards Institute
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TR 103 121-2013
Scope
The present document addresses a new approach to assess or anticipate the conversational quality of end-to-end transmissions. It is based on the adaptation of the ETSI QoS Model (hereafter referred to as E-Model) in order to better consider results from field testing. The present document defines the principles of this new approach@ the test conditions including test equipment test setup@ the conversational subjective test plan and the results of the tests conducted for this new approach. The model takes into account the variable parameters such as end-to-end delay@ talker echo@ degree of interactivity between the subjects (expressed as Talker Alternation Rate) and listening quality. Comparisons between the new model and other approaches such as E-Model are also made available.
TR 103 121-2013 history
2013TR 103 121-2013 Speech and multimedia Transmission Quality (STQ); Adaptation of the ETSI QoS Model to better consider results from field testing (V1.1.1; Includes Diskette)