Mumutauro we digital, tsamba dze AMR dzakapfupika kune A daptive M ulti- R idya uye inoenderana ne AMR audio format. Iyi faira faira mafaira, iyo yakatanga kusunungurwa muna 1999, inonyanya kushandiswa pakugadzirisa nekuchengetedza zvinyorwa zvemashoko zvichienzaniswa nevakawanda ma formats akaita MP3 , WMA , uye AAC somuenzaniso. Iko kurasikirwa kwemafaira nemafaira anowanzozivikanwa ne .amr extension - kunze kweiyo murairo ndeyokuti fomu yeGG 3GP inogona kushandiswa kuchengetedza hova dze AMR pamwechete nemavhidhiyo. Zvichiitika, iyi iyi nzira yekunyora izwi iri dzimwe nguva inonzi inododing.
AMR Narrowband uye Wideband shanduro
Iko kune zvinyorwa zviviri ma AMR format maitiro ayo ari AMR-NB uye AMR-WB. Yokutanga (AMR-NB), inonzi narrowband version iyo inowanzoshandiswa mumamiriro ezvinhu apo pasi madhoma bitrate akakwana - zvakadai sezwi guru rekurekodha raunogona kuva naro pane MP3 player yako . Izvo zvinowanzoshandiswa zvinoreva AMR-NB ndeye 300-3400 Hz iyo inokwanisa kubudisa unhu hwehutano hunofananidzwa nehutano hwetsika. Iyi shanduro yebandband inoshandisa zvinotevera bitrate:
- 04.75 kbps
- 05.15 kbps
- 05.90 kbps
- 06.70 kbps
- 07.40 kbps
- 07.95 kbps
- 10.20 kbps
- 12.20 kbps
Shanduro yechipiri ye AMR ndiyo yebandundu yebandband iyo inomiririrwa nezwi, AMR-WB. Sezvo zita racho rinogona kuratidza, iyi inzwi rakasimbiswa rinoshandisa bandwidth rakakura kupfuura AMR-NB kuitira kuchengetedza inzwi pamwero wakakwirira kwazvo - mararamiro emagetsi anoshandiswa ndeokuti iyi-50 -7000 Hz. Zvinonzi bitrate zvinoshandiswa zvebandband ye AMR ndeizvi:
- 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
Nemhaka yepamusoro yepamusoro yepamusoro yepamusoro uye naizvozvo zvakanakisa kutaura, AMR-WB yakagadzirirwa kushandiswa mu GSM (Global System for Mobile Communications) uye utsi hweMMTS (Universal Mobile Telecommunications System) - zvimwe zvinonzi 2G uye 3G mitambo yepamusoro maererano.
AMR Vs. MP3 for Voice Recordings
Kunyange zvazvo MP3 format zvingangove yakakurumbira mafirimu aripo, haisi kunyanya kukosha (inofananidzwa ne AMR) kana zvasvika pakukodha kutaura. Iko ma format AMR, kune rumwe rutivi, yakakosha pane basa rakadaro uye ndiyo yakasarudzika yakarongwa kunyange zvazvo isiri yakawanda inotsigirwa ne hardware ne software.
Chirongwa chakanyanya kufanana neAmR kuti iwe ungangodaro uchitaridzika mumimhanzi yedijitari iri kushandisa kadhi inotakura (yakadai se MP3 player kana smartphone) kutora inzwi; vakawanda MP3 player mazuva ano anogona kuwirirana sezvo izwi rerekodhi vachishandisa microphone yakagadzirirwa. Kuti uite kushandiswa kwakashandiswa kwe MP3 player yekuchengetedza zvishoma-kunyanya kana flash-yakagadzirwa-chigadzirwa ichi inogona kusarudza kushandiswa kwema format AMR. Mafaira ari mu AMR maitiro akawandisa zvishoma pamusana pemafomu akakurumbira anoshandiswa kuchengetedza mimhanzi - se MP3, AAC, WAV, uye WMA somuenzaniso.