AMR (Adaptive Multi-Rate) ndi mtundu wamawu wokongoletsedwa kuti azitha kukopera mawu. Amagwiritsidwa ntchito kwambiri m'mafoni a m'manja pojambula mawu komanso kusewera.
Ntchito Zofala
Voice recordings
Mobile audio
Telephony
AMR Mafunso Ofunsidwa Kawirikawiri Okhudza Kusintha kwa Anthu
Kodi ndi AMR audio wapamwamba?
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AMR ndi narrow-band mawu codec kale anagwiritsa ntchito ndi 2G / 3G mafoni mafoni. AMR amapeza kumvetsa mawu pa bitrates kwambiri pansi ndi ndi chofanana mu voicemail kugulitsa, kukanikiza-kulankhula zolemba, ndi older feature-phone mawu maganizo. AMR amachititsa mawu kujambula absurdly ochepa - nthawi ya mawu amagwirizana mu megabytes angapo - ndipo ndi zimene ambiri mafonibe kujambula mafoni mu.
Nchifukwa chiyani kujambula kwa AMR kumawoneka kocheperako poyerekeza ndi nyimbo?
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Chifukwa sichiyenera kubweretsa nyimbo. AMR ndi codec ya mawu yokhala ndi bandwidth yafupi yopangidwa kuti igwiritse ntchito ma netiweki a mafoni, yosinthidwa kuti ipange mawu omvetsa bwino pa bitrate yowerengedwa mu kilobits ya digito imodzi. Zonse zomwe zili m'mphepete mwa mawu a munthu zimathetsedwa nthawi yotenga. Kusintha kwa mtundu wa full-range kumateteza kujambula kwa ntchito zonse, koma sichingathe kuwonjezeranso ma frequencies omwe sanasampilidwe. AMR ndi narrowband mawu codec kuyendetsa pakati pa 4.75 ndi 12.2 kbps, modeling munthu woimba m'mimba kuposa wonse audio spectrum. AMR amawononga nyimbo: yake 8 kHz bandwidth amachotsa zonse pamwamba foni ma frequencies, ndi palibe ndalama ya re-encoding amabweretsa izo kumbuyo.
Kodi ndi komwe ma fayilo a AMR amachokera?
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Mafoni a Voicemail, Push-to-Talk Radios, Old Handset ndi Telephony Recording - kulikonse Audio anali kuyenda pa m'mphepete mwa mchenga, mtengo kwambiri channel.That chikhalidwe amafotokoza awiri chifukwa chiyani mavidiyo ndi ochepa ndi chifukwa chake iwo akuoneka mmene iwo achita.Kusintha amawapangitsa kusewera mu mapulogalamu otchuka; si, ndipo sakhoza, kuwonjezera khalidwe la khalidwe la kulandira nthawi zonse anali. AMR ndi Adaptive Multi-Rate, mawu codec 3GPP standardized kwa GSM mawu kulankhula ndi mafoni mawu olemba.
Nchifukwa chiyani fayilo yanga AMR imawonekera popanda dzina la track kapena ntchito yachikhalidwe?
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AMR idafotokozedwa m'mawu okha, popanda malo oyenera kwa mutu, album kapena chithunzi chachithunzi, kotero osewera amabwereranso kukuwonetsa dzina la fayilo. Kusintha kwa mtundu wokhala ndi tag ndi zomwe zimapangitsa kuti laibulale ikhale yosakata - ma tag amalemba nthawi yosintha, osati kubwezeretsedwa, kotero yembekezerani kuwonjezera chilichonse chomwe chimachokera.
Kupatulapo ngati zinthu zina zimafuna kuti zichotsedwe. Formatiyo ikhoza kutsegulidwa, ndipo palibe chifukwa chofuna kusinthitsa archive yomwe siyikuyambitsa mavuto, koma sichingakhalepo chifukwa cha kusinthitsa kwa archiveyo. Kwa zinthu zina, formati yatsopano siyikuwononga ndalama zambiri ndipo imateteza ku mafunso ena a m'tsogolo.
Nchifukwa chiyani fayilo ya AMR siyidzasewera mu browser yanga?
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Mawebusayiti amachotsa mndandanda wafupi, wokhazikika wa ma audio formats ndi AMR ndi kunja kwa izo, kotero fayilo imatsitsa pamalo osewera kapena wosewerayo amadziwitsa vuto. Makompyuta a desktop ndi sewero la codec layikulu limatsegula popanda vuto. Ngati ma audio amayenera kusewera patsamba la webusaiti, kusinthidwa kwake ndi kusinthidwa - palibe kuwongolera kwa wosewerayo kuwonjezera decoder yomwe msakatuli satumiza.
Kodi ndiyenera kusintha bwanji mafayilo anga a AMR?
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Kugwirizana ndi malo osankhidwa, si cholinga. Kwa nyimbo, 256 mpaka 320 kbps ndi zosaoneka kwa aliyense womvetsera; kwa mawu ndi podcasts, 96 mpaka 128 kbps ndi zambiri ndipo amadula fayiloyo ku theka. Kulemba mawu kudzera pa ma bitrate ochokera kumawononga malo - amasunga mawu omwe kale apita ku lossy pass ndipo sabwezeretsa chilichonse chomwe chimatulutsidwa ndi wolemba mawu woyamba.
Ndi AMR lossy kapena lossless?
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AMR ndi lossy - encoder amachotsa deta encoder akatswiri kukhala inaudible kuti afike m'lifupi wapamwamba kukula.
Kodi ndiyenera kusintha AMR kuti pogawana?
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Kuti musinthe AMR kuti MP3, muyenera kutsatira malangizo pansipa: 1. Sankhani AMR wapamwamba mtundu, monga MP3, FLAC, WAV, ndi zina zambiri.
Kodi ndi ndalama zingati kuti kusintha kusintha kukula kwa fayilo?
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Kusintha AMR kuti lossless mtundu monga WAV kapena FLAC amasunga kukula kwakukulu; kusintha kuti MP3 kapena AAC pa bitrates amodzi (192-320 kbps) amachepetsa fayilo ndi pafupifupi 5-10x ndi zochepa kuzindikira kusintha kwa katundu.
