Ngomsindo wedijithali, izinhlamvu ze-AMR zifushane ku- A ekudambiseni M ulti- R idla futhi ihambisana nefomethi ye-AMR yomsindo. Le fomethi yefayili yomsindo, eyaqala ukukhishwa ngo-1999, iyasebenza ngokuphumelelayo ekucindezeleni nasekugcineni ukuqoshwa kwezwi kuqhathaniswa namafomethi avamile afana ne- MP3 , i- WMA , ne- AAC njengesibonelo. Kuyisakhiwo esilahlekile namafayela avame ukukhonjiswa nge-.amr isandiso - ngaphandle kwale mithetho ukuthi ifomethi ye-container ye-3GP ingasetshenziswa futhi ukugcina imifudlana ye-AMR kanye nevidiyo. Ngokusobala, lolu hlobo lwezinqubo zokubhala ngezwi ngezinye izikhathi lubhekiselwa njengegama lokubiza amagama.
Izinguqulo ze-AMR Narrowband neWideband
Kukhona amazinga amabili e-AMR ama-AMR-NB ne-AMR-WB. Owokuqala (i-AMR-NB), inguqulo ye-narrowband evame ukusetshenziselwa ezimweni lapho ama- bitrate aphansi anele khona - njengeziko eliyisisekelo lokurekhoda kwezwi ongaba nalo kumdlali wakho we- MP3 . Ibanga lemvamisa elisetshenziselwa i-AMR-NB lingu-300-3400 Hz elikwazi ukukhiqiza ikhwalithi yomsindo efana nefoni yendabuko. Le nguqulo encane isebenzisa ama-bitrate alandelayo:
- 04.75 kbps
- 05.15 kbps
- 05.90 kbps
- 06.70 kbps
- 07.40 kbps
- I-07.95 kbps
- 10.20 kbps
- 12.20 kbps
Inguqulo yesibili ye-AMR wuhlobo lwe-wideband olumelelwe igama, AMR-WB. Njengoba igama lingasikisela, lokhu kuyisimo sezwi esithuthukisiwe esisebenzisa umkhawulokudonsa obanzi kunama-AMR-NB ukuze ugcine izwi ngekhwalithi ephakeme kakhulu - ibanga lemvamisa elisetshenziselwa lokhu yi-50 -7000 Hz. I-bitrate esetshenziselwa i-wideband version ye-AMR yilezi:
- I-06.60 kbps
- 08.85 kbps
- 12.65 kbps
- 14.25 kbps
- 15.85 kbps
- 18.25 kbps
- 19.85 kbps
- 23.05 kbps
- 23.85 kbps
Ngenxa yobuningi bayo bezinga eliphezulu futhi ngakho-ke izinga eliphezulu lokukhuluma, i-AMR-WB ilungiselelwe ukusetshenziswa ku-GSM (Global System for Mobile Communications) kanye nobuchwepheshe be-UMTS (Universal Telecommunications System) - okubizwa ngokuthi yi-2G no-3G amanethiwekhi weselula ngokulandelana.
AMR Vs. I-MP3 ye-Voice Recordings
Nakuba i-MP3 format kungenzeka ukuthi ifomethi yokulalelwayo ethandwa kakhulu, ayikho kahle kakhulu (uma kuqhathaniswa ne-AMR) uma kuziwa ekukhulumeni inkulumo. I-format ye-AMR, ngakolunye uhlangothi, inhle kakhulu kulowo msebenzi futhi ifomethi okhethwayo yize ingaxhaswa kabanzi yi-hardware nesofthiwe.
Uhlelo oluvame kakhulu lwe-AMR ukuthi cishe luzohlangana nomculo wedijithali usebenzisa idivayisi ephathekayo (njenge-MP3 player noma i-smartphone) ukuthatha umsindo; abaningi abadlali be-MP3 kulezi zinsuku bangaba kabili njengoba abarekhoda bezwi basebenzisa imakrofoni eyakhelwe ngaphakathi. Ukuze usebenzise kahle isitoreji esilinganiselwe somdlali we-MP3 - ikakhulukazi uma i-flash isekelwe - umenzi wedivayisi angakhetha ukusebenzisa ifomethi ye-AMR. Amafomethi kufomethi ye-AMR ayincane kakhulu ngokwesilinganiso kunamafomethi athandwa kakhulu asetshenziselwa ukugcina umculo - njenge-MP3, AAC, WAV, ne-WMA ngokwesibonelo.