ETSI TR 146 055-2017 数字蜂窝通信系统(第2+阶段)(GSM全球移动通信系统);GSM增强型全速率(EFR)语音编解码器的性能表征(V14.0.0;3GPP TR 46.055 版本14.0.0 发行版本14)
Digital cellular telecommunications system (Phase 2+) (GSM); Performance characterization of the GSM Enhanced Full Rate (EFR) speech codec (V14.0.0; 3GPP TR 46.055 version 14.0.0 Release 14)