ETSI EG 201 377-1-2009 语音处理,传输和质量方面(STQ).语音传输质量的规范和衡量.第1部分:通过网络的单道语音质量的客观比较衡量法介绍(版本1.3.2)
Speech and multimedia Transmission Quality (STQ); Specification and measurement of speech transmission quality; Part 1: Introduction to objective comparison measurement methods for one-way speech quality across networks