ETSI EG 201 377-3 V1.1.1 (2003-06)
ETSI EG 201 377-3 V1.1.1 (2003-06)ETSI Guide
Speech Processing, Transmission and Quality Aspects (STQ);
Specification and measurement of
speech transmission quality;
Part 3: Non-intrusive objective measurement methods
applicable to networks and links with classes of services
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