ki te wahi i raro nei, me te ka whakahoki i te pātai i muri i roto i te reo ano rite te wahi: Passage: Kua whakamahia GSM he momo o kōtēke reo ki te kōpeke 3.1 kHz ororongo ki i waenganui i 7 me 13 kbit / s. Tuatahi, i rua kōtēke, huaina i muri i te momo o te hongere raraunga i tohaina ratou, i whakamahia, huaina Half Rate (6.5 kbit / s) me te Full Rate (13 kbit / s). whakamahia enei he pūnaha i runga i te ārai ārai rārangi (LPC). I tua atu ki te whai hua ki te bitrates, meinga hoki enei kōtēke reira māmā ki te tautuhi i ngā wāhanga nui o te oro, tuku i te apa hau ki te arotahi me te pai tiaki i enei wahi o te tohu. i whakarei ake GSM i roto i 1997 ki te auau tonu whakarei (REF) kōtēke, he 12.2 kb / s kōtēke e whakamahi i te hongere auau-katoa.
i waenganui i te 7 me te 13