Izizathu zokuba kutheni i-Bluetooth ingenza ukunciphisa umgangatho wezandi
I-Bluetooth ihamba ngokukhawuleza ibe yindlela eqhelekileyo yokunandipha i-wireless audio ngokusebenzisa izithethi kunye ne-headphones. Nangona kunjalo, enye inkxalabo yokuba abanye bayenayo ngokubhekiselele kwiBluetooth kunye nokunciphisa jikelele umgangatho wezandi. Kukho abo bavakalelwa kukuba-ukusuka kwimbono yokuthembeka ye-audio - uhlala ungcono xa ukhetha enye ye- Wi-Fi-based based wireless technologies , njenge-AirPlay, i-DLNA, i-Play-Fi, okanye i-Sonos.
Nangona le nkolelo ichanekile, kukho enye ukusebenzisa iBluetooth kunokuba ungazi.
I-Bluetooth ayidalwanga kungekudala yokuzonwabisa, kodwa ukudibanisa iifowuni zeefowuni kunye neefowuni ze-SMS. Kwakhona kwenzelwe i-bandwidth emncinci kakhulu, eyenzela ukuba isebenzise ukuxilwa kwedatha kwisignali yomsindo. Nangona le nto ingahle ifumaneke ngokufanelekileyo kwintetho yocingo, ayikho into ekuveliseni umculo. Akunjalo kuphela, kodwa i-Bluetooth ingayisebenzisa le ngcinezelo phezu kokuncintisana kwedatha okungenzeka ikhona kakade, njengeefayile zomsindo wedijithali okanye imithombo evela kwi-intanethi. Kodwa enye into ephambili yokukhumbuza kukuba inkqubo yeBluetooth ayifuni ukusebenzisa le nkcenkceshelo eyongezelelweyo. Nasi isizathu:
Zonke iifowuni zeBluetooth kufuneka zixhase i-SBC (imele i-Low Complexity Subband Coding). Nangona kunjalo, iifowuni zeBluetooth zinokuxhasa iikhowudi ezikhethiweyo, ezifumaneka kwiBluetooth Advanced Distribution Distribution (I-A2DP).
Iicodec ezikhethiweyo zikhethiweyo zi: MPEG 1 & 2 Audio (MP2 ne-MP3), MPEG 3 & 4 (AAC), ATRAC, kunye neAptX. Ukucacisa ezimbalwa zezi: Iifomati eqhelekileyo ye-MP3 empeleni i-MPEG-1 Layer 3, ngoko i-MP3 ihlanganiswe phantsi kwe-spec njengecodec yokuzikhethela. I-ATRAC yi-codec eyayisetyenziswe ikakhulu kwimikhiqizo yakwa-Sony, ingakumbi kwi-MiniDisc ifomathi yokurekhoda yedijithali.
Makhe sijonge ngeendlela ezimbalwa ukusuka kwiphepha le-A2DP, elingafumaneka njengexwebhu le-PDF kwi-Bluetooth.org.
4.2.2 Iikhowudi ezikhethiweyo
I sixhobo sinokuxhasa ama-codec okhethiweyo ukwenzela ukwandisa ukusetyenziswa kwayo. Xa zombini i-SRC kunye ne-SNK ixhasa i-codec efanayo, i-codec ingasetyenziselwa endaweni yeCodec.
Kulo xwebhu, i-SRC ibhekisela kwisixhobo somthombo, kwaye i-SNK ibhekisela kwisitya (okanye kwindawo yokuya kuyo). Ngoko umthombo uya kuba yi-smartphone yakho, ithebhulethi, okanye ikhompyutheni, kwaye isanti yayiza kuba sisithethi seBluetooth, i-headphones, okanye i-receiver.
Oku kuthetha ukuba i-bluetooth ayifuni ukuba yongezele ukuxhomekeka kwedatha eyongezelelweyo kwizinto eziye zinyanzeliswe. Ukuba zombini umthombo kunye neenkomfa zinkxaso zixhasa i-codec esetyenziswe ukufakela isignali yomsindo wokuqala, isandi sinokudluliselwa kwaye senziwe ngaphandle kokuguqulwa . Ngaloo ndlela, ukuba uphulaphule iifayile ze-MP3 okanye ze-AAC ozigcine kwi-smartphone yakho, ithebhulethi, okanye ikhomputha, i-Bluetooth ayifanele ihlaziye umgangatho wezandi ukuba zombini iifowuni zixhasa loo fomethi.
Lo mgaqo usebenza nakwi- intanethi yee-intanethi kunye neenkonzo zomculo ezisasazelayo ezifakwe kwi-MP3 okanye i-AAC, ehlanganisa ubuninzi bezinto ezikhoyo namhlanje. Nangona kunjalo, ezinye iinkonzo zomculo bezihlolisise ezinye iifom, ezifana nendlela uSpotify esebenzisa ngayo i- Ogg Vorbis codec .
Njengoko i-bandwidth ye-intanethi iyanda kwithuba elide, sinokubona okukhethwa kukho kunye nokubhetele ngakumbi kwixesha elizayo.
Kodwa ngokweBluetooth SIG, umbutho ovumela i-Bluetooth, ukunyanzelisa kuya kuhlala kuyimfuneko ngoku. Oku kubangelwa kukuba ifowuni kufuneka ikwazi ukuhambisa umculo kuphela kodwa kunye namacenge nezinye izaziso ezinxulumene neefowuni. Sekunjalo, akukho sizathu sokuba umenzi akakwazi ukutshintsha ukusuka kwi-SBC ukuya kwi-MP3 okanye kwi-compression AAC ukuba ifowuni yokufumana i-Bluetooth isekela. Ngaloo ndlela izaziso ziza kusebenza, kodwa iifayile ze-MP3 okanye ze-AAC ziza kudlula.
Kuthiwani ngeAptX?
Umgangatho womsindo we-stereo ngeBluetooth uye waphucula emva kwexesha. Nabani na owaziyo okwenzeka kwiBluetooth uvile nge- cptec ye-aptX , edayiswa njengento yokuphucula kwi-SBC codec egunyazisiweyo. Ibango lokwakha i-aptX yikhono layo lokuhambisa ikhwalithi ye-CD efana ne-Bluetooth ngaphandle kwentambo ye-Bluetooth. Khawukhumbule nje ukuba zombini idivayisi ye-Bluetooth kunye ne-sink kufuneka ixhase i-codec ye-aptX ukuze inzuzo. Kodwa ukuba udlala i-MP3 okanye i-AAC impahla, umenzi angaba ngcono xa esebenzisa ifomathi yomthonyama yefayili yomsindo ngaphandle kokufowunelwa kwakhona kwakhona nge-AptX okanye i-SBC.
Uninzi lweemveliso zomsindo weBluetooth azakhiwa yinkampani abaqeshwa babo bembatha i-brand yabo, kodwa ngu-ODM (umvelisi wendalo wokuqala) awuzange uyive. Kwaye ummkeli weBluetooth osetyenziswa kwisixhobo somculo mhlawumbi akenzwanga ngu-ODM, kodwa ngomnye umenzi. Abo babesemashishini bafunda ukuba kunzima ukuvelisa umkhiqizo wedijithali, kwaye ukuba kukho iinjineli ezininzi ezisebenzayo kuyo, mhlawumbi akukho mntu uyazi yonke into malunga noko kwenzeka ngokwenene ngaphakathi kwesixhobo. Ifomathi enye iyakwazi ukugqithiselwa kwenye indawo, kwaye awukwazi ukuyiqonda kuba akukho nto ifowuni yokufumana i-Bluetooth eya kukuxelela oko ifomathi engenayo.
I-CSR, inkampani ene-codec ye-aptX, ibanga ukuba isignali yomsindo we-AptX inikwe ngokucacileyo phezu kwekhonkco yeBluetooth. Nangona i-AptX luhlobo loxinzelelo, kufuneka ukuba lisebenze ngendlela engathinteli kakhulu ukuthembeka kwezandi (ngokubhekiselele kwezinye iindlela zokuncintisana).
I-codec ye-aptX isebenzisa isicatshulwa esikhethekileyo sokunciphisa intlawulo esichazela ukuvakala komsindo ngelixa ivumela idatha ukuba ifaniswe kwiBluetooth "ipayipi" ngaphandle kwentambo. Ixabiso leedatha lilingana nelomculo womculo (16-bit / 44 kHz), ke ngoko kutheni inkampani ilinganisa i-AptX ne "CD-like" sound.
Kodwa kubalulekile ukuqaphela ukuba isinyathelo ngasinye kwisikrini somsindo sichaphazela ukuveliswa kwesandi. I-codec ye-aptX ayikwazi ukuhlawulela i-headphones / izithethi ezisezantsi ezisezantsi, iifayile zomsindo ophantsi / imithombo, okanye amandla ahlukahlukileyo abaguquli be- digital-to-analog (i-DACs) ezifumaneka kumadivayisi. Indawo yokuphulaphula nayo kufuneka iqwalaselwe ngokunjalo. Naluphi na ukunyaniseka okwenziwe ngeBluetooth nge-AptX kunokufihla ingxolo, njengezixhobo zokusebenza / i-HVAC, izithuthi zithuthi, okanye iingxoxo eziseduze. Ngaloo nto engqondweni, kunokufaneleka ukukhetha izithethi zeBluetooth ngokusekelwe kwiimpawu kunye neentloko ezixhomekeke kwintuthuzelo ngaphandle kokuhambelana ne-codec.
Kubalulekile ukuqaphela ukuba ngelixa i-Bluetooth (njengoko isetyenziswa ngokuqhelekileyo) ihlaziye umgangatho wezandi (kwiiyure ezihlukeneyo), ayifanele. Kubaluleke kakhulu kubafaki beefowuni ukusebenzisa i-Bluetooth ngendlela echaphazela umgangatho womculo ubuncinane - okanye mhlawumbi, akunjalo. Emva koko kufuneka uqaphele ukuba ukungafani okufihlakeleyo phakathi kwama-codec omsindo kunzima ukuva, kwimeko enhle ngokwenene. Kwiimeko ezininzi, iBluetooth ayiyi kuba nempembelelo ephawulekayo kumgangatho womsindo wesixhobo somsindo. Kodwa ukuba unakho ukugcina indawo kwaye ufuna ukususa konke ukungathandabuzeki, unokuhlala ujabulela umculo ngokudibanisa imithombo usebenzisa ikhebula lomsindo .