Inkcazo ye-aptX Bluetooth codec kunye ne-AptX vs SBC
Amadivaysi ahlukeneyo alalelwayo ase-Bluetooth angasebenzisa ii- codec ezahlukeneyo ezikhokelela kwiinkcukacha ezahlukeneyo kunye nokungafani komgangatho womculo. Enye ikodec ephuma kuQualcomm epapashwa njengendlela "engcono kune-CD", ibizwa ngokuba yi-AptX.
Injongo ye-aptX (i-previously spelled -X-X ) ukubonelela ngezixhobo zomsindo iindlela zokuphucula umgangatho ophilileyo kunokuba ziphi ezinye iicodec. Izixhobo ezingasebenzisa i-aptX ziquka i-headphone, ii-smartphones, iipilisi, i-stereos yemoto, okanye ezinye iintlobo zezitena zeBluetooth.
I-term AptX ibhekiselele kuphela kwi-teknoloji yasekuqaleni kodwa i-suite yezinye iinguqu ezinjenge- AptX ephakamileyo , i- Aptx Live , i- AptX Low Latency , ne- Aptx HD- zonke ezixhamlayo kwiimeko ezahlukeneyo ngaphakathi kwendawo yokulalelwayo.
I-AptX ifanelana njani ne-SBC
Ngokungagqibekanga, zonke iifowuni zeBluetooth kufuneka zixhase i-codec ye-sub-band encoding encoding (SBC). Nangona kunjalo, ezinye ii-codec ezifana ne-AptX zingasetyenziselwa kunye ne-SBC, eyakhelwe kuphela ukubonelela ngomgangatho ozwakalayo.
I-SBC isekela iisampuli zee-frequencies ukuya kuma-48 kHz kunye kunye namazinga amancinci ukuya kwi-198 kb / s kwimifudlana ye-mono kunye ne-345 kb / s kwimifudlana ye-stereo. Ukuthelekisa, i-AptX HD idlulisela umsindo ngaphaya kwe-576 kb / s yefayile ye-24-bit 48 kHz, evumela ukuba idatha yomsindo ophezulu ihanjiswe ngokukhawuleza.
Omnye umehluko yindlela yokunyanzeliswa esetyenziswayo kunye nalezi zicodec ezimbini. i-AptX isebenzisa into ebizwa ngokuba yi-adaptive differential-modulation-code modulation (ADPCM). "Ukuhlukahlukana okuthintekayo" kubhekisela kwindlela kunye nesiphi isampuli esisasazwayo. Kwenzeka ntoni ukuba isalathisi esilandelayo siqikelelwa ngokusekelwe kwisignali esandulelayo, kwaye umahluko phakathi kwezi zibini yedwa idatha ehambayo.
I-ADPCM ikwahlula kwakhona i-audio kwiimigangatho ezine ezihlukeneyo zamanqanaba ahlukeneyo ekugqibeleni zibonelela ngamnye ngesilinganiselo sayo sesigxina-kwingxolo (S / N), esichazwe ngumbonakaliso olulindelekileyo kwinqanaba leengxolo. I-AXX iboniswe ukuba ibe ne-S / N engcono xa isebenzelana nomxholo womculo, odla ngokuwa phantsi kwe-5 kHz.
Nge-AptX Low Latency, ungalindela ngaphantsi kwama-40 ms of latency, okubhetele kakhulu kuneSBC 100-150 ms. Oko kuthetha ukuthini ukuhambisa umsindo ohambelana nevidiyo, kwaye ulindele ukuba isandi sifanisane nevidiyo ngaphandle kokulibazisa kangangoko njengecebo elisebenzisa i-SBC. Ukuba nomsindo ohlala uvumelaniswe nevidiyo kubalulekile kwiindawo ezifana nokusakaza kwevidiyo kunye nokudlala imidlalo.
Olunye uvavanyo lwe-AptX algorithms ezikhankanywe ngasentla zizisebenzise zona, nazo. Ngokomzekelo, i-AptX Live yakhiwe kwiimeko eziphantsi kwee-bandwidth xa iifowuni ze-wireless zisetyenziswa. Ukuphuculwa kwe-aptX yenzelwe ngakumbi kwizicelo zobugcisa kwaye isekela ukuya kwi-1.28 Mb / s bbit rate ye-16-bit ye-48 kHz idatha.
Yiyiphi le nto ihlayo xa usebenzisa ii-aptX zixhobo kukuba kufuneka ukwazi ukufumana isandi esicacileyo kunye nesisindo esiphezulu seenkcukacha zomsindo, kwaye uphulaphule izinto eziphezulu zeempawu kunye neengcingo ezincinci kunye nokulibaziseka.
AptX Izixhobo
Isixhobo somthombo wokuqala we-AptX yi-Samsung Galaxy Tab 7.0 Plus, kodwa ubuchwephesha be-Qualcomm aptX njengamanje esetyenziswe kwizigidi zabathengi ngeekhompyuter ukusuka kumakhulu emveliso.
Unokufumana i-AptX kwiimvalo zee-soundbars, iipilisi, izithethi kunye neentloko ezifakwe iinkampani ezifana ne-Vizio, iPanasonic, iSams, kunye ne-Sony.
Unokufumana ezinye zezixhobo kwiwebhusayithi ye-Qualcomm's AptX Products. Ukusuka apho, unokucoca iziphumo ukubonisa i-AptX, aptX HD, kunye neefayili ze-AptX Low Latency.
I-Codec Isn & # 39; t Yonke loo nto
Yikhumbule ukuba i-AptX kuphela yesikhowudi kwaye ayithethi ukuba i-headphone, izithethi, njl, ziya kwenza kakuhle nje ngokuba i-codec ye-SBC ayisetyenzisiwe. Ingcamango kukuba ubunjineli beBluetooth yiyo eyenza izibonelelo.
Ngamanye amagama, nangona xa kusetyenziswe ifowuni ye-AptX, akuyi kuba nokuphucula okukhulu xa uphulaphule ifayile yomsindo ophantsi okanye usebenzisa i-headphones ephukile; i-codec inokuyenza kuphela umgangatho wokulalelwayo, kwaye enye ishiywe kwi-data yangempela yesandi, ukuphazamiseka kwimizila, ukusetyenziswa kwezixhobo, njl njl.
Kwakhona kubalulekile ukuba uqaphele ukuba zombini ukuthumela nokufumana idivaysi yeBluetooth kufuneka ixhase i-AptX ngezibonelelo eziza kubonwa, ngaphandle kokuba i-codec encinane (SBC) isetyenziswe ngokungafihla ukuze zombini iifowuni zisakwazi ukusebenza.
Umzekelo olula ungabonwa ukuba usebenzisa ifowuni kunye nezinye izithethi ze-Bluetooth zangaphandle. Yitsho ifowuni yakho isebenzisa i-AptX kodwa izithethi zakho azikho, okanye mhlawumbi ifowuni ayithethi kodwa izithethi zakho zenza. Ngandlela-thile, kuyafana nokungafani nhlobo.