Uma usuqalile ukubuka ama-headphone angenantambo bese uhlangana namagama afingqiwe angajwayelekile njenge-SBC, i-AAC, i-aptX, noma i-LDAC, kuvamile ukuzizwa udidekile . Phakathi kwezinguqulo ze-Bluetooth, izindlela ezinesinqumo esiphezulu, amaphrofayili, kanye namanye amagama anzima, kunzima ukwazi ukuthi iyiphi i-codec oyithandayo nokuthi empeleni ithinta kangakanani umsindo owuzwayo.
Isihluthulelo ukuqonda ukuthi ama-codec e-Bluetooth anesibopho sokucindezela nokukhulula umsindo ukuze ukwazi ukuhamba nge-bandwidth elinganiselwe ye-Bluetooth . Kuye nge-algorithm esetshenziswa yi-codec ngayinye, ikhwalithi yomsindo, ukubambezeleka (ukubambezeleka phakathi kwalokho okwenzeka esikrinini nalokho okuzwayo), kanye nokusetshenziswa kwebhethri konke kuzohluka. Ake sikuchaze konke ngokuthula, kodwa ngokwemibandela evamile ukuze ungadingi ukuba unjiniyela ukuze uqonde.
Iyini ngempela i-Bluetooth codec futhi kungani ibalulekile?
Igama elithi codec livela ku-"encode" kanye nelithi "decode," futhi lichaza isethi yemithetho esetshenziswa ukupakisha nokukhipha umsindo wedijithali . Uma uthumela umculo kusuka efonini yakho kuya kuma-headphone akho e-Bluetooth, ifoni ifaka isignali nge-codec, bese ama-headphone ayikhipha ngaleyo codec efanayo ukuze ukwazi ukuyizwa.
Ububanzi be-Bluetooth bulinganiselwe kakhulu uma kuqhathaniswa nokuxhumeka kwezintambo noma kwe-Wi-Fi , ngakho-ke ukuthumela umsindo ongacindezelwanga "njengoba unjalo" akunakwenzeka ezimweni eziningi. Yingakho ama-algorithms afana nalawa esebenza, enciphisa usayizi wedatha ngenkathi ezama ukulondoloza ulwazi oluningi ngangokunokwenzeka futhi enciphisa izinto zobuciko, umsindo, noma ukulahlekelwa okubonakalayo, ngaleyo ndlela kuthuthukiswa ikhwalithi yomsindo.
Amanye ama-codec aklanyelwe ukunikeza ikhwalithi engcono kakhulu, amanye abeka phambili ukubambezeleka okuphansi, kanti amanye ahlose ukusetshenziswa kwamandla aphansi kanye nokuhambisana cishe nayo yonke into . Awekho aphelele kuzo zonke izinhlangothi ezintathu ngesikhathi esisodwa: ngokuvamile, uma ukhulisa kakhulu ikhwalithi noma wehlisa ukubambezeleka okukhulu, uzokhokha intengo yokusetshenziswa kwamandla noma ukuzinza kokuxhumeka.
Ukuze i-codec isebenze, kubalulekile ukuthi kokubili umthumeli (ifoni ephathekayo, i-PC, i-TV, i-console) kanye ne-receiver (ama-headphone, isikhulumi, i-soundbar) bayisekele . Uma ama-headphone akho esekela i-LDAC kodwa ifoni yakho ephathekayo isekela i-SBC ne-AAC kuphela, uxhumano luzokwenziwa kusetshenziswa i-codec ephansi kakhulu, cishe njalo i-SBC noma i-AAC, noma kungadingeka ubuyekeze i-Bluetooth yakho.
Imiqondo eyisisekelo: i-bitrate, imvamisa yokuthatha amasampula, ukujula kwe-bit, kanye nokubambezeleka
Ngaphambi kokuthi singene ku-codec ngayinye, kufanelekile ukucacisa amagama amane ozowabona ngokuphindaphindiwe ezicacisweni : i-bitrate, izinga lesampula, ukujula kwe-bit, kanye nokubambezeleka. Ukuqonda ukuthi ngalinye lisho ukuthini kuzokusiza ukuhumusha izincazelo zobuchwepheshe ngaphandle kokulahleka.
I-Bitrate (kbps noma i-Mbps) ikhombisa ukuthi ingakanani idatha yomsindo edluliselwa ngomzuzwana . Ngokuvamile, i-bitrate ephezulu isho ukuthi ulwazi oluningi luyagcinwa futhi kungenzeka lube ngcono, uma nje i-codec isebenza kahle. Kodwa-ke, khumbula ukuthi i-bitrate ilinganisa inani ledatha, hhayi ikhwalithi ngokwayo: i-codec embi ku-bitrate ephezulu ingazwakala imbi kunenhle ku-bitrate ephansi.
Izinga lokuhlola (kHz) yinani "lezifinyezo" ezithathwe yigagasi lomsindo umzuzwana ngamunye . Indlebe yomuntu inokuzwa okucishe kube phakathi kuka-20 Hz no-20 kHz, yingakho umsindo we-CD usebenzisa u-44,1 kHz: lokhu kuhlangabezana nenqubo yokuhlola okungenani kabili imvamisa ephezulu esifuna ukuyiphinda. I-48 kHz ivame ukusetshenziswa kuvidiyo, kanti umsindo we-"Hi-Res" uvame ukusebenzisa u-88,2, 96 kHz, noma amazinga aphezulu kakhulu.
Ukujula kwe-bit kubonisa ukuthi mangaki ama-bit asetshenziswa ukumela isampula ngayinye yomsindo . Ama-bit amaningi asho ububanzi obukhulu obuguquguqukayo kanye namazinga evolumu anembe kakhudlwana. I-CD isebenzisa ama-bits ayi-16; amafomethi anesinqumo esiphezulu ngokuvamile asebenzisa ama-bits angu-24, ngisho nama-bits angu-32 kwezinye izinhlelo. Empeleni, akukho nzuzo enkulu yokuzwakala ngaphandle kwama-bits angu-24 ezindaweni ezijwayelekile zasekhaya.
Ukubambezeleka yisikhathi esithathayo ukuze umsindo uhambe usuka emthonjeni uye ezindlebeni zakho . Uma ulalele umculo nje, ukubambezeleka okuncane akuyona inkinga. Kodwa emidlalweni, kumakholi wevidiyo, noma lapho ubuka ama-movie, ukubambezeleka okuphezulu kubangela ukungalingani phakathi kwalokho okubonayo nalokho okuzwayo, okuyinto ecasulayo kakhulu. Yilapho ama-codec abambezeleka kancane enza khona umehluko.
Njengomthetho ojwayelekile, ama-codec anomthelela omkhulu kakhulu ekubambezelekeni nasekuzinzeni kunasekhwalithini yomsindo ongavuthiwe , ngaphandle kokuthi sikhuluma ngezinketho eziyisisekelo njenge-SBC kuzilungiselelo eziphansi. Ikhwalithi yesishayeli se-headphone, i-DAC/amplifier, kanye nokuqoshwa ngokwako kuvame ukuba nomthelela omkhulu kune-codec ekhethiwe.
I-SBC: i-codec eyisisekelo eqondwa yiwo wonke umuntu
I-SBC (i-Subband Coding noma i-low-complexity subband codec) iyi-codec edingekayo kunoma iyiphi idivayisi esebenzisa iphrofayili ye-Bluetooth A2DP . Ngamanye amazwi, uma idivayisi idlala umsindo we-stereo nge-Bluetooth, okungenani kumele isekele i-SBC. "Iyi-denominator ephansi kakhulu" ye-ecosystem.
Le codec yaklanywa ukusebenza ngisho nakumadivayisi anamandla okucubungula aphansi kakhulu , yingakho i-algorithm yayo ilula kakhulu futhi ingalungiselelwanga kahle ikhwalithi yomsindo. I-bitrate yayo evamile isukela cishe ku-240 kbps kuya ku-328-345 kbps, ngesilinganiso sokusampula esingu-44,1 noma 48 kHz.
Empeleni, i-SBC inikeza ikhwalithi eyamukelekayo yokulalela okungahleliwe, umsakazo, ama-podcast, noma umculo wangemuva , kodwa uma ucindezela kancane, uzoqala ukuqaphela ukuntuleka kwencazelo, indawo, kanye nemininingwane, ikakhulukazi ezindaweni eziyinkimbinkimbi noma ngamavolumu aphezulu. Ngaphezu kwalokho, ukubambezeleka kuphakeme kakhulu, ngakho akuyona inketho engcono kakhulu yokudlala imidlalo noma ukubuka ividiyo ezwela ukuvumelana kwezindebe; ungabheka izixazululo ezingaba khona uma uhlangabezana nokuyeka noma ukubambezeleka ngokweqile.
Inzuzo enkulu ye-SBC ukuhambisana kwayo okubanzi kanye nokusebenzisa amandla aphansi . Kumadivayisi alula kakhulu noma ezimweni lapho ukuzinza nokuphila kwebhethri kubaluleke kakhulu, kusalokhu kuyindlela enengqondo. Kodwa-ke, uma ama-headphone akho enikeza i-SBC kuphela futhi kungekho okunye, ungacabanga ukuthi ubhekene nemodeli yezinga lokuqala kakhulu.
I-AAC: I-codec eyinhloko ye-Apple (futhi isakazeke kakhulu ngokujwayelekile)
I-AAC (Advanced Audio Coding) iyi-codec yokucindezela elahlekile esetshenziswa kabanzi ekusakazeni, kumavidiyo, nakumculo wedijithali . Iyingxenye yezindinganiso ezifana ne-MPEG-4 futhi yenzelwe ukuthuthukisa i-MP3 yakudala: ikhwalithi engcono nge-bitrate efanayo kanye nomthwalo omncane ezinhlelweni.
Ku-ecosystem ye-Apple, i-AAC iyi-codec eyinhloko engenantambo yomsindo we-Bluetooth . Ama-iPhone, ama-iPad, ama-Mac, nama-AirPod (kanye namanye ama-headphone amaningi ahambisanayo) ayisebenzisa ngokuzenzakalelayo. Ngobuchwepheshe, isekela ama-bitrate afinyelela ku-320 kbps, ngamazinga okusampula afinyelela ku-96 kHz kanye nokujula kwama-bit afinyelela ku-24 bits.
Esinye sezici ezibalulekile ze-AAC ukusetshenziswa kwe-VBR (Variable Bitrate) , evumela i-bitrate ukuthi ilungiswe ngokuya ngobunkimbinkimbi bengxenye yomsindo: lapho umculo ulula, kusetshenziswa idatha encane, futhi lapho uba yinkimbinkimbi kakhulu, i-bitrate iyandiswa ukuze kulondolozwe ikhwalithi. Lokhu kuthuthukisa ukusebenza kahle futhi kulinganisela ukusetshenziswa kwedatha, usayizi, kanye nokuthembeka.
Kumadivayisi e-Apple, i-AAC ivame ukusebenza kahle kakhulu: inikeza ikhwalithi enhle ebonwayo kanye nokubambezeleka okunengqondo kokusetshenziswa okuningi . Kodwa-ke, kumafoni amaningi e-Android, ukusetshenziswa kwe-AAC akulungisiwe kangako, futhi kungaholela ekusetshenzisweni okuphezulu kwezinsiza, ukungingiza ngezikhathi ezithile, kanye nokubambezeleka okubi kancane kunalokho obekulindelekile.
Uma usebenzisa i-iPhone, "ushadile" ne-AAC kanye ne-SBC yomsindo we-Bluetooth , ngakho-ke okufanele ugxile kukho ikhwalithi yama-headphone kanye nomthombo, kunokushintsha ama-codec, ngoba ngeke ukwazi ukukhetha i-aptX, i-LDAC, noma efanayo ku-iOS.
i-aptX nomndeni: Ukubheja kweQualcomm ukuthuthukisa ulwazi lwe-Android
I-aptX umndeni wama-codec aphethwe yi-Qualcomm, athandwa kakhulu kumafoni e-Android kanye nakuma-headphone amaningi kanye nama-soundbar . Umqondo wokuqala ngemuva kwe-aptX ukunikeza ukucindezela okusebenzayo kakhulu kune-SBC, ngekhwalithi ebonakala kangcono kanye nokubambezeleka okuphansi, sisebenzisa amandla abaprosesa besimanje.
I-aptX yakudala ivame ukusebenza nge-bitrate efinyelela ku-352 kbps, ngama-bits angu-16 kanye no-44,1/48 kHz . Empeleni, ihlotshaniswa nekhwalithi ye-near-CD yomculo olahlekile obhalwe kahle, uma nje lonke uchungechunge lwesignali lusezingeni elifanele. Kuyintuthuko ecacile kune-SBC ezimweni eziningi zangempela.
Ngaphandle kwe-aptX ejwayelekile, i-Qualcomm ithuthukise izinhlobo eziningana ezikhethekile ukuze imboze izimo ezahlukene zokusetshenziswa . Ezaziwa kakhulu futhi ezisakazeke kakhulu yi-aptX LL (Low Latency), i-aptX HD, i-aptX Adaptive, kanye ne-aptX Lossless.
- I-aptX LL iklanyelwe ukunciphisa ukubambezeleka komsindoNjengoba ine-latencies engaba ngu-30-40 ms ngaphansi kwezimo ezifanele, igcina i-bitrate efika ku-352 kbps ku-16 bits/48 kHz, ngakho ikhwalithi ihle futhi, ngaphezu kwakho konke, ifaneleka kakhulu emidlalweni, kuma-movie naku-TV.
- I-aptX HD ihloselwe ukuthembeka okuphezulu, ngama-bitrate afinyelela ku-576 kbps, ama-24 bits kanye ne-48 kHzIhlose ukusondela ezingeni "lencazelo ephezulu" ngaphakathi kwemikhawulo ye-Bluetooth, inikeza ububanzi obuguquguqukayo kanye nemininingwane engcono kune-aptX ejwayelekile.
- I-aptX Adaptive izama ukuba yisisombululo esiphelele, ilungisa ngokuzenzakalelayo i-bitrate phakathi kwama-kbps angaba ngu-279 no-420.Isekela kufika kuma-bits angu-24 kanye nama-kHz angu-96. Inhloso yayo ukulinganisela ikhwalithi, ukuzinza, kanye nokubambezeleka okuphansi, ivumelane nendawo yomsakazo kanye nohlobo lokuqukethwe. Ihambisana ne-backward ne-aptX kanye ne-aptX HD.
- I-aptX Lossless, ehlanganiswe ngaphakathi kwepulatifomu ye-Snapdragon Sound, ihlose ukuletha umsindo ongenamkhawulo, wekhwalithi ye-CD (16-bit/44,1 kHz) nge-BluetoothLokhu ikwenza ngokulungisa i-bitrate ngesikhathi sangempela, ifinyelele ngaphezu kwe-1 Mbps uma uxhumano lukuvumela futhi yehle uma izimo ziba zimbi kakhulu.
Inkinga enkulu yomndeni wonke we-aptX ukuthi ayisekelwa kumadivayisi e-Apple . Ngaphezu kwalokho, ku-Android, akuwona wonke amafoni asekela zonke izinhlobo: amaningi afaka i-aptX eyisisekelo kuphela, amanye aneza i-aptX HD, kanti amanye amamodeli aphakathi nendawo/aphezulu kuphela anikeza i-aptX Adaptive noma i-aptX Lossless.
Uma unefoni ye-Android ehambisanayo nama-headphone amahle ayisekelayo, i-aptX kunoma yiziphi izinhlobo zayo ngokuvamile iyindlela ephelele kakhulu . Ikuvumela ukuthi unciphise ukubambezeleka uma kuqhathaniswa ne-AAC/SBC futhi inganikeza ikhwalithi engcono kunalezi, ikakhulukazi i-aptX HD kanye ne-Adaptive enomculo wekhwalithi ephezulu.
I-LDAC: I-Sony isebenza kahle kakhulu kuma-"Hi-Res" angenantambo
I-LDAC iyi-codec ethuthukiswe yi-Sony egxile ekuxazululeni okuphezulu kanye nokwandisa umkhawulokudonsa we-Bluetooth . Iqinisekiswe njenge-Hi-Res Audio Wireless futhi isibe yindinganiso yokudlulisa umsindo we-24-bit ngaphandle kwentambo ku-96 kHz.
I-LDAC ingasebenza ngesivinini esithathu: 330, 660, kanye ne-990 kbps . Kumodi yayo ephezulu (990 kbps), iyakwazi ukudlulisa umsindo we-24-bit/96 kHz ngokucindezela okubushelelezi, ihlanganisa amasu okucindezela nezingxenye ezingacindezelwanga ukuze kulondolozwe ukuthembeka okuphezulu kakhulu.
Inzuzo enkulu ukuthi i-Google ihlanganise i-LDAC ku-Android Open Source Project (AOSP) kusukela nge-Android 8.0 , okuvumela amafoni amaningi e-Android ukuthi ayifake ngaphandle kokudinga amalayisense engeziwe. Kuvamile kakhulu ukuyibona kuma-smartphone asezingeni eliphakathi nasezingeni eliphezulu, kanye nakuma-headphone avela kumikhiqizo efana ne-Sony, i-Sennheiser, i-Edifier, i-Technics, kanye nabanye abakhiqizi abamukele le ndinganiso.
Ngakolunye uhlangothi, i-LDAC ayisekelwa kuma-iPhone, futhi ingaba nzima kakhulu maqondana nokusetshenziswa kwezinsiza kanye nekhwalithi yokuxhumeka komsakazo . Uma i-bitrate yayo ephezulu, idinga isixhumanisi esizinzile kakhulu, futhi uma kukhona ukuphazamiseka noma ukude nedivayisi, uhlelo lungase luwe ngokuzenzakalelayo lube yi-660 noma i-330 kbps, okubangela ukulahlekelwa kwekhwalithi.
Ngokuphathelene nokubambezeleka, i-LDAC ivame ukuba phezulu kune-aptX LL noma ezinye izindlela ze-aptX Adaptive , ngakho-ke akuyona i-codec efanelekile yokudlala imidlalo yokuncintisana noma ukubukela i-TV ngaphandle kwezinkinga zokuvumelanisa izindebe. Indawo yayo yemvelo ukulalela umculo wekhwalithi ephezulu ngama-headphone amahle, lapho kungenza khona umehluko wangempela uma kuqhathaniswa nama-codec ayisisekelo.
I-LHDC ne-LLAC: enye indlela eya kumsindo we-Bluetooth ocacile
I-LHDC (Low Latency High Definition Codec) iyi-codec eyakhiwe yi-Savitech futhi ikhuthazwa yi-HWA (Hi-Res Wireless Audio) alliance . Njenge-LDAC, iqinisekiswe umsindo ongenantambo onesinqumo esiphezulu futhi ihlose ukuletha ulwazi oluseduze ngangokunokwenzeka nomthombo wokuqala.
Ngokwezobuchwepheshe, i-LHDC ingafinyelela ama-bitrate afinyelela ku-900 kbps, ngokusekelwa kwama-bits angu-24 kanye ne-96 kHz . Lokhu kuyibeka eduze kakhulu ne-LDAC ngokwemibono, yize indawo ethile yokusebenzisa kanye nokusetshenziswa kwayo kunquma umphumela wokugcina.
Phakathi kwabakhiqizi abakhethe i-LHDC kukhona imikhiqizo efana ne-Huawei, i-Sennheiser, i-Onkyo, i-Pioneer, kanye ne-1MORE , ngaphezu kwamanye ama-smartphone e-Android anezesekeli ezengeziwe eziqala nge-Android 10. Kodwa-ke, ukusetshenziswa kwayo kuphansi kakhulu kunokwe-LDAC noma i-aptX, ngakho-ke kuvamile ukuthola ukungalingani noma kufanele kube neqiniso kakhulu ngokuhlanganiswa kwefoni ephathekayo nama-headphone.
Kukhona uhlobo olubizwa ngokuthi i-LLAC noma i-LHDC LL olugxile ekunciphiseni i-latency . Le modi, eyenzelwe ngisho "nemodi yomdlalo," idela i-bitrate ethile ephezulu (cishe i-600 kbps ku-48 kHz nama-24 bits) ukuze igcine i-latency engaba ngu-30 ms, izibalo ezincintisana kakhulu ngisho noma ziqhathaniswa ne-aptX LL.
Ubuthakathaka be-LHDC ne-LLAC ukuthi, njenge-LDAC ne-aptX, azisekelwa kumadivayisi e-Apple, futhi ukutholakala kwazo ku-Android akuhambisani nhlobo . Uma unesithakazelo, kubalulekile ukuhlola ngokucophelela ukuthi kokubili ifoni yakho nama-headphone kuyahambisana nokuthi umenzi ukucacisa ngokucacile lokhu kuhambisana.
I-LC3, i-SSC, i-Airia (SCL6) namanye ama-codec asafufusa
Ngaphezu kwama-codec adumile, kuvela isizukulwane esisha sama-codec ngenxa ye-Bluetooth LE Audio kanye nezidingo zomsindo wesimanje . Izibonelo eziphawulekayo zifaka phakathi i-LC3, indinganiso entsha esemthethweni ye-Bluetooth; i-Scalable Codec (SSC) ye-Samsung; kanye ne-Airia/SCL6, eyalandela i-MQair.
I-LC3 (Low Complexity Communication Codec) iyi-codec ekhethelwe izici ezintsha ze-Bluetooth LE Audio , njengomsindo osakazwa kabanzi, ukwabelana ngomsindo ezindaweni zomphakathi, kanye nezinhlelo zokuzwa ezithuthukisiwe. Yenzelwe ukuthi isebenzise amandla kahle kakhulu, inikeze ikhwalithi engcono kune-SBC ngama-bitrate afanayo noma aphansi.
Le codec isekela ukujula kwama-bit afinyelela kuma-bit angu-32 futhi ifinyelela ukubambezeleka okuphansi kune-SBC ne-AAC , ngenkathi futhi inciphisa ukusetshenziswa kwamandla kuma-headphone nama-earphone. Kodwa-ke, ayiklanyelwe umsindo omsulwa ongenakulahlekelwa, kodwa kunalokho yokucindezela okulahlekelwe okwenziwe ngcono kakhulu.
I-Samsung Scalable Codec (SSC), ebizwa nangokuthi i-Seamless Hi-Fi Codec ezinguqulweni zayo zakamuva, iyi-codec ye-Samsung eyimfihlo yamafoni ayo e-Galaxy kanye ne-Galaxy Buds . Ilungisa i-bitrate ngokushesha ngokusekelwe kwikhwalithi yesixhumanisi futhi isekela umsindo olahlekile onesinqumo esiphezulu, ihlala ilwela ukugcina ibhalansi engcono kakhulu phakathi kokuzinza nokuthembeka.
I-Airia (SCL6), eyayaziwa ngokuthi i-MQair, iyi-codec ethuthukiswe yi-MQA Labs eyenzelwe ukusebenza hhayi nge-Bluetooth kuphela, kodwa futhi nge-UWB kanye ne-Wi-Fi . Ingaguqula ngokuguquguqukayo izinga ledatha eliphakathi kwama-kbps angu-200 nama-20 Mbps, ivumela umsindo ongenakulahlekelwa ngisho neziteshi eziningi ngokubambezeleka okuphansi kakhulu.
Iningi lala ma-codec asafufusa linenkinga efanayo: ukwamukelwa kusalinganiselwe kakhulu, futhi amaningi ahilela izindleko zelayisensi . Empeleni, usazobhekana nokuningi kakhulu kwe-SBC, AAC, aptX, LDAC, kanye ne-LC3 njengoba i-LE Audio isabalala kakhulu.
I-codec ixoxiswana kanjani phakathi kwamadivayisi futhi kwenzekani uma engahambisani?
Uma uxhuma ama-headphone e-Bluetooth efonini yakho, womabili amadivayisi ashintshana ngohlu lwama-codec awasekelayo . Ukusuka lapho, azama ngokuzenzakalelayo ukukhetha i-codec "esezingeni eliphezulu" afanayo: isibonelo, uma womabili esekela i-LDAC, azosebenzisa i-LDAC; uma abelana nge-aptX HD kodwa hhayi i-LDAC, azoxoxisana nge-aptX HD; futhi uma kungekho okungcono, azonamathela ku-AAC noma i-SBC.
Uma umthumeli efuna ukusebenzisa i-codec ephezulu kodwa umamukeli engayiqondi, akukho okungenziwa: kuzodingeka ukuthi yehle iye kwi-codec elula kakhulu nevame kakhulu . Lokhu kuchaza ukuthi kungani ngezinye izikhathi uthenga ama-headphone ahambisana ne-aptX noma i-LDAC, kodwa ifoni yakho iwasebenzisa kuphela ku-SBC: noma ngabe ifoni ayisekeli leyo codec, noma ikhutshaziwe, noma usebenzisa uhlelo lokusebenza noma iphrofayili ye-Bluetooth engavumeli lokho.
Kumafoni amaningi e-Android, ungafinyelela izinketho zonjiniyela bese ubona ukuthi iyiphi i-codec esebenzayo njengamanje , futhi uphoqe ngisho neyodwa ukuze uyihlole. Ukusuka lapho, ungasebenzisa izinketho ze-Bluetooth ezithuthukisiwe ukuhlola ukuthi ngabe ama-codec e-LDAC, aptX Adaptive, noma afanayo ayasetshenziswa ngempela, noma ukuthi ngabe ngandlela thile ashintshele ku-SBC.
Kuma-iPhone, awukwazi ukukhetha i-codec ngesandla: uhlelo lulawula konke futhi luhlala phakathi kwe-AAC ne-SBC . Uma ama-headphone akho ekhangisa i-aptX, i-LDAC, noma i-LHDC, lokho kusekelwa ngeke kusetshenziswe uma uwaxhuma kudivayisi ye-iOS.
Iyiphi i-codec ekufanele kuye ngokuthi uyisebenzisa kanjani: umculo, imidlalo, ama-movie, kanye nokuphila kwebhethri
Uma kukhulunywa ngakho, okubaluleke kakhulu kunokukhumbula zonke izifinyezo ukwazi ukuthi yini okufanele uyibeke phambili esimweni ngasinye . Ukulalela iSpotify esitimeleni akufani nokuchitha amahora amaningi udlala umdlalo wokudubula oncintisanayo noma ubukele uchungechunge lwe-TV egumbini lokuphumula.
Uma okubaluleke kakhulu kuwe kuyikhwalithi yomsindo engcono kakhulu enama-headphone amahle kanye nefoni ye-Android ehambisanayo , ikhambi elifanele ukusebenzisa i-LDAC ku-660/990 kbps, i-aptX HD noma i-aptX Adaptive, noma i-LHDC uma i-ecosystem yakho iyisekela. Kuzo zonke izimo, kubalulekile ukuthi umthombo ube sezingeni elanele: I-LDAC ayisebenzi kangako uma udlala i-MP3 engu-128 kbps noma umsakazo we-inthanethi ocindezelwe kakhulu.
Kumageyimu namavidiyo lapho ukuvumelanisa kubalulekile khona, ukubambezeleka kuyinkosi . Yilapho i-aptX LL, izindlela zokubambezeleka okuphansi ze-aptX Adaptive, kanye ne-LLAC/LHDC LL zikhanya khona. Ama-headset amaningi emidlalo afaka ne-USB transmitter yawo ukuze adlule imikhawulo ye-Bluetooth futhi afinyelele izikhathi zokuphendula eziphansi kakhulu.
Uma ukuhambisana kuyinto eza kuqala kuwe futhi ungafuni ukwenza izinto zibe nzima kakhulu, i-AAC kumadivayisi e-Apple kanye ne-aptX noma i-SBC ejwayelekile ku-Android izokwanela ukulalela umculo, ama-podcast, nokubuka amavidiyo ngokunganaki. Kulesi simo, gxila ekukhetheni ama-headphone anabashayeli abahle, ikhwalithi yokwakha eqinile, kanye nokukhanselwa komsindo okusebenzayo (i-ANC) uma ufuna ukuzihlukanisa nendawo okuyo, bese usebenzisa izinhlelo zokusebenza ezifana ne -Poweramp Equalizer ukuze ulungise umsindo.
Ezimweni ezisebenzisa amandla aphansi noma ngamadivayisi alula kakhulu (izipikha ezincane, amagajethi asekhaya, ama-transmitter angabizi), amamakrofoni ebhendi elilodwa (ama-SBC) asasebenza kahle kakhulu . Anikeza ikhwalithi enhle, asebenzisa amandla amancane, futhi awadingi ihadiwe enamandla, okunciphisa izindleko; ngaphezu kwalokho, izinketho zomsindo we-mono zivame kakhulu kumadivayisi alula kakhulu.
Kubalulekile futhi ukukhumbula ukuthi i-codec ayikwazi ukuthuthukisa ikhwalithi yokuqala, zama nje ukuyigcina . Uma ithrekhi yokuqala ingaqoshwanga kahle noma icindezelwe kakhulu, akukho silinganiso se-LDAC, i-aptX HD, noma i-SCL6 esizoyilungisa ngokuyisimangaliso. Isixhumanisi esibuthakathaka kakhulu kulolu chungechunge sisalawula umphumela.
Indlela yokuthola ukuthi yimaphi ama-codec asekelwa yifoni yakho ephathekayo nama-headphone
Ukuze uqede noma yikuphi ukungabaza mayelana nama-codec asekelwa amadivayisi akho, into yokuqala okufanele uyenze ukuhlola imininingwane esemthethweni yomkhiqizi . Iwebhusayithi yomkhiqizo ivame ukuba nesigaba esifana nokuthi "Amafomethi Omsindo Asekelwe" noma "Ama-Supported Audio Codec," afaka phakathi i-SBC, i-AAC, i-aptX, i-LDAC, njll.
Ku-Android, ungavumela futhi imodi yonjiniyela futhi ufinyelele izinketho ze-Bluetooth ezithuthukisiwe . Ukusuka lapho, ungabona i-codec esetshenziswa njengamanje futhi, kumamodeli amaningi, uphoqa ngesandla i-LDAC, i-aptX HD, i-SBC, noma i-AAC ukuthi ihlole umehluko, uma nje idivayisi eyamukelayo nayo iyisekela.
Ku-iPhone, izinto zikhawulelwe kakhulu: I-Apple ayikuvumeli ukuthi ukhethe i-codec noma ufake ama-codec ezinkampani zangaphandle . Uyazi kusengaphambili ukuthi uzosebenza ne-AAC kanye ne-SBC, nokuthi asikho isisombululo esisekelwe ku-aptX, LDAC, noma i-LHDC esizosebenza njengoba kuhlosiwe.
Uma ubheka ama-headphone, izinhlobo eziningi manje ziqokomisa ama-codec ahambisanayo njengendawo yokuthengisa . Uma imodeli ine-LDAC noma i-aptX Adaptive, uzoyibona iboniswa ngokucacile ezicacisweni. Uma kufakwe i-SBC kuphela ohlwini, kuyisibonakaliso sokuthi akukho okuningi ongakunikeza kuleyo ndawo.
Ukukhetha i-codec efanele kuyingxenye eyodwa nje yephazili . Umthombo omuhle, ukudluliselwa kweselula okuthembekile, abashayeli abahle kanye ne-DAC/amp efanelekile kuma-headphone, kanye nendawo engenamsindo kubaluleke kakhulu, uma kungenjalo kakhulu, kunelebula le-codec ebhokisini. Noma kunjalo, ukuqonda ukuthi i-SBC, i-AAC, i-aptX, i-LDAC, i-LHDC, i-LC3, nama-codec afanayo asebenza kanjani kukunikeza isisekelo esiqinile sokwenza izinqumo ezinolwazi oluthe xaxa futhi ungathembeli kuphela ekukhangiseni.
