ETSI EG 201 377-1-2002 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1.2.1)
Speech Processing, Transmission and Quality Aspects (STQ); Specification and Measurement of Speech Transmission Quality; Part 1: Introduction to Objective Comparison Measurement Methods for One-Way Speech Quality Across Networks V1.2.1