ETSI TR 146 055-2002 数字蜂窝通信系统(第2阶段).GSM增强型全速率(EFR)语音编解码器的性能特征3GPP TR 46.055(版本5.0.0,第5次发布)
Digital Cellular Telecommunications System (Phase 2+); Performance Characterization of the GSM Enhanced Full Rate (EFR) Speech Codec 3GPP TR 46.055 Version 5.0.0 Release 5