I loko o ka hua'ōlelo pilikino, ua pōkole nā leka AMR no kahi pilina o M ulti R a pili a me ka leo AMR. ʻO kēia 'ōlelo leo leo, i hoʻokuʻu muaʻia i ka makahiki 1999, kahi maikaʻi loa i ka compressing a me ka mālamaʻana i nā leo leo e like me nā'ōlelo likeʻole me MP3 , WMA , a me AAC . ʻO ia kahi hōpili paʻakikī me nā pūnaewele iʻikeʻia me ka .amr extension -ʻo keʻole naʻe i kēia kaʻina kānāwaiʻo ia hoʻi ka waihona 3GP pūnaewele hiki ke hoʻohanaʻia no ka mālamaʻana i nā kahawai AMR me ka wikiō. ʻOiai,ʻo kēiaʻano o keʻano o keʻano o keʻano o ka'ōlelo leo e'ōleloʻia ai he leo.
Nā AMR Narrowband a me Wideband versions
Aiaʻelua mau papahana hōʻailona AMR i AMR-NB a me AMR-WB. ʻO ka mea mua (AMR-NB), he kope kiko'ī ia e hoʻohana mauʻia ana i kahi kūlana haʻahaʻa - e like me keʻano o ka waihona leo leo hiki iāʻoe ma kāu MP3 player . ʻO ke alapine e hoʻohanaʻia no AMR-NB he 300-3400 Hz i hiki ke hana i ka maikaʻi maikaʻi e like me ka teleponi kuʻuna. Ke hoʻohana nei kēia kulekele i kēia mau hana:
- 04.75 kbps
- 05.15 kbps
- 05.90 kbps
- 06.70 kbps
- 07.40 kbps
- 07.95 kbps
- 10.20 kbps
- 12.20 kbps
ʻO kaʻaoʻaoʻelua o AMR,ʻo ia ka momo kikowaena i hōʻikeʻia e ka acronym, AMR-WB. E like me ka inoa e manaʻoʻia,ʻo kēia ka mea hoʻopōmaikaʻi maikaʻi e hoʻohana ana i ka bandwīwīʻoi aku ma mua o ka AMR-NB no ka mālamaʻana i ka leo ma kahiʻano kiʻekiʻe aʻe -ʻo ke alapine e hoʻohanaʻia no kēia 50 -7000 Hz. ʻO nā bitrates i hoʻohanaʻia no ka pūnaewele hohola o AMR:
- 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
Ma muli o kona alapine ka lōʻihi a no laila keʻano o ka'ōlelo 'ōlelo kiʻekiʻe, ua hoʻonohonoho' ia ka AMR-WB no ka hoʻohana 'ana ma GSM (Global System for Mobile Communications) a me nāʻenehana UMTS (Universal Mobile Telecommunications System) - iʻikeʻoleʻia he 2G a me 3G pūnaewele pūnaewele.
Ana AM MP3 no nā leo leo
ʻOiaiʻo ka MP3 MP3 pahaʻo ia ka leo leo punaha loa loa,ʻaʻole maikaʻi loa (e like me ka AMR) inā pili i ka'ōlelo hoʻopiʻi. ʻO ka palapala AMR, ma kekahiʻaoʻao, he maikaʻi loa ia ma iaʻanoʻoihana aʻo ia ka hōʻailona kūpono ināʻaʻoleʻo ia i kākoʻo nuiʻia e nā lakohana a me nā lako polokalamu.
ʻO ka noi maʻamau i ka AMR e hiki iāʻoe ke hōʻea i nā mele likeʻole e hoʻohana i kekahi polokalamu kelepona (e like me ka MP3 player a iʻole kelepona) e hopu i ke kani; nui nā polokalamu MP3 i kēia mau lā ke pāpālua e like me nā mea kani leo e hoʻohana ana i kahi microphone condenser i kūkuluʻia. I mea e hoʻohana pono ai i ke kolamuʻokoʻa MP3 - ma keʻano paha inā hoʻonohonohoʻia nā flash - hiki ke kohoʻia e ka mea hana hana o ka mea hoʻohana i ka hōʻailona AMR. ʻO nā'ōnaehana ma ka hōʻailona AMR he mea emi loa ia ma mua o nāʻanoʻoihana kaulana i hoʻohanaʻia e mālama i nā mele - e like me MP3, AAC, WAV, a me WMA.