EG 201 377-2 : 1.3.1
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The latest, up-to-date edition.
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English
Intellectual Property Rights
Foreword
Introduction
1 Scope
2 References
3 Definitions and abbreviations
3.1 Definitions
3.2 Abbreviations
4 General considerations for end-to-end speech quality evaluations
5 Test configurations
5.1 Test setup for terminals
5.2 Setup of the electrical interfaces
5.3 Test signals
5.4 Accuracy of test equipment
6 Test conditions
6.1 Acoustic environment
6.2 Network conditions, general
7 Measurement of "standard" parameters
7.1 Sending frequency response
7.2 Receiving frequency response
7.3 Overall frequency response
7.4 Sending (and connection) loudness rating
7.5 Receiving (and connection) loudness rating
7.6 Overall loudness rating
7.7 Sidetone masking rating
7.8 Listener sidetone
7.9 Measurement and calculation of the value of the
D-factor (DelSM)
7.10 Delay
7.11 Terminal coupling loss
7.12 Talker echo loudness rating
7.13 Weighted echo path loss
7.14 Distortion
7.15 Sensitivity against out-of-band signals in sending
7.16 Spurious out-of-band signals in receiving
8 Advanced measurement procedures, taking into account the
conversational situation
8.1 Measurement setup for objective tests
8.2 Practical realization of test signals
8.3 Quality of background noise transmission
8.4 Double talk performance
8.5 Switching characteristics
8.6 Level adjustments by companding or AGC
8.7 Additional echo disturbances
8.8 Speech sound quality
Annex A (informative): Bibliography
History
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