ETSI EG 202 396-3-2015 语音和多媒体传输质量(STQ);存在背景噪音时的语音质量表现;第3部分:背景噪声传输 客观测试方法(V1.5.1)
Speech and multimedia Transmission Quality (STQ); Speech Quality performance in the presence of background noise; Part 3: Background noise transmission - Objective test methods (V1.5.1)