European digital cellular telecommunications system - half rate speech - part 6 : voice activity detector for half rate speech traffic channels ; english version ets 300581 - 6 : 1995 欧洲数字移动电话远程通信系统.半价话务.第6部分:半
2.
European digital cellular telecommunications system - half rate speech - part 4 : comfort noise aspects for the half rate speech traffic channel ; english version ets 300581 - 4 : 1995 欧洲数字移动电话远程通信系统.半价话务.第4部分:半
3.
European digital cellular telecommunications system - half rate speech - part 5 : discontinuous transmission for half rate speech traffic channels ; english version ets 300581 - 5 : 1995 欧洲数字移动电话远程通信系统.半价话务.第5部分:半
4.
European digital cellular telecommunications system - half rate speech - part 3 : substitution and muting of lost frames for half rate speech traffic channels ; english version ets 300581 - 3 : 1995 欧洲数字移动电话远程通信系统.半价话务.第3部分:半