Key Takeaways
- Qualcomm's aptX Lossless codec tuaj yeem phim thiab tshaj CD zoo.
- Tsis muaj Apple's AirPods tuaj yeem tshaj tawm suab tsis tau.
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Latency tseem rhuav tshem Bluetooth rau kev siv tshaj lij.
Qualcomm tau los nrog lub tshiab lossless Bluetooth nti uas ua rau Bluetooth lub suab zoo li suab paj nruag los ntawm ib lub xov tooj.
Bluetooth suab yog ubiquitous, thiab ultra-convenient, tab sis nws muaj ob downsides: suab zoo thiab latency. Nws tsis zoo li qhov latency yuav daws tau, tab sis Qualcomm tus tshiab aptX Lossless codec daws qhov teeb meem zoo vim nws muaj peev xwm tshaj tawm suab ntawm CD zoo thiab dhau mus. Nws tseem muaj peev xwm Apple tau tos ntawm no codec rau nws cov AirPods tom ntej, uas tam sim no tsis muaj peev xwm tshaj tawm cov nkauj tsis muaj Apple Music.
Yog li, dab tsi yog qhov nyuaj ntawm kev nyem qhov zoo rau hauv cov txheej txheem uas tseem siv los txuas cov keyboards thiab nas?
"Nws tag nrho los rau ob qhov teeb meem," John Carter, tus kws tshaj lij suab thiab tus tsim khoom ntawm Bose lub suab nrov tshem tawm lub mloog pob ntseg, hais rau Lifewire ntawm email. "Ib qho, bandwidth rau Bluetooth (nws kuj qeeb), thiab tom qab ntawd ob, lub sijhawm tsim nyog los tig cov ntaub ntawv aptX rau hauv suab uas tuaj yeem ua raws li lub suab waveform rau cov hais lus lossis lub mloog pob ntseg."
Lossless ?
Thaum suab paj nruag yog streamed, nyob rau hauv internet los yog ntawm Bluetooth, lub suab yuav hloov dua siab tshiab rau ib tug "lossy" hom xws li MP3. Algorithms ua haujlwm tawm qhov twg ntawm lub suab tuaj yeem muab pov tseg yam tsis muaj kev cuam tshuam rau qhov zoo heev. Feem ntau, cov neeg mloog tsis tuaj yeem qhia qhov txawv ntawm MP3 zoo thiab tus thawj.
Lossless lub hloov dua siab tshiab kuj ua rau cov ntaub ntawv me, tab sis nws ua li ntawd yam tsis tau poob cov ntaub ntawv. Koj tuaj yeem hloov rov qab mus rau qhov qub hom, thiab cov txiaj ntsig yuav tsum zoo ib yam. Thiab thaum nws me dua li cov ntaub ntawv qub, nws loj dua li qhov poob qis.
Tam sim no, Qualcomm tau tswj hwm los tsim cov codec (luv luv rau encode / txiav txim siab) uas tuaj yeem hloov thiab xa cov suab tsis zoo sai txaus rau kev siv dav dav hauv smartphones thiab Bluetooth headphones, piv txwv li. Nrog 5G tes hauj lwm los hauv online, streaming lossless suab los ntawm huab yog qhov ua tau zoo. Tam sim no, koj tuaj yeem xa lub suab ntawd rau koj lub pob ntseg yam tsis muaj xov hlau.
The aptX Lossless codec khiav ntawm 16 ntsis 44.1kHz, aka CD zoo. Nws tuaj yeem ncav cuag 24-ntsis 96kHz lossy, ib yam nkaus, uas zoo li tsis muaj ntsiab lus me ntsis. Nws tseem tuaj yeem tshawb pom qhov tsis muaj suab nrov thiab nws pib hloov mus rau CD zoo, nrog rau txo qis qhov zoo kom cov suab paj nruag streaming.
"Bluetooth ua haujlwm nyob rau hauv qhov sib txawv ntawm RF-kev cuam tshuam ib puag ncig muaj nyob nrog Wi-Fi thiab microwave ncu uas tuaj yeem cuam tshuam cov teeb liab kis tau tus mob," audio engineer Sam Brown hais rau Lifewire ntawm email."Qhov kev sib tw yog nyob rau hauv kev tswj hwm qib siab ntawm lub suab zoo hauv txhua qhov chaw ua haujlwm."
Delay
Thaum twg koj nias ua si ntawm ib zaj nkauj xa hauv Bluetooth, muaj qhov ncua sij hawm luv kom txog thaum lub suab paj nruag hits koj pob ntseg. Nws yog kwv yees li kaum lab milliseconds, yog li koj tsis tau ceeb toom-kom txog thaum koj ua si, lossis siv lub suab paj nruag app zoo li GarageBand. Nyob rau hauv cov ntaub ntawv no, lub suab yuav lag puas-yog li-me ntsis tom qab koj cov keypresses, thiab nws txaus los ua kev ntxhov siab.
Qhov latency no yog tshwm sim los ntawm kev hloov lub suab mus rau digital wireless kwj, tom qab ntawd hloov nws rov qab rau hauv suab ntawm lwm qhov kawg. Qhov no yog vim li cas gamers thiab tshuab raj tseem siv wired headphones thiab hais lus-vim lawv muaj latency ntawm xoom.
Qhov kev sib tw yog nyob rau hauv kev tswj hwm qib siab ntawm lub suab zoo hauv txhua qhov chaw ua haujlwm.
"Qhov peb yuav pom yog tias kev tswj hwm Bluetooth ntawm lub suab yuav zoo dua thiab zoo dua nyob rau lub sijhawm, raws li nws muaj yav dhau los," Carter hais."Cov decoders uas nthuav cov ntaub ntawv compressed rov qab rau hauv suab yuav tau nrawm dua thiab sai dua. Yog li, peb yuav tsum cia siab tias yuav pom kev txhim kho txuas ntxiv, txawm tias qeeb dua li peb txhua tus xav tau."
Tab sis puas tuaj yeem ua tau zoo li ib txoj hlua?
"Qhov kev ua tau zoo tshaj plaws ntawm kev ua si yog kwv yees li 40ms, yog li cov kev daws teeb meem no tau los ze dua thiab ze rau lub hom phiaj ntawm 'zero-latency'," piav qhia Carter, tab sis thaum kawg, nws yuav tsis muaj ntau txog. engineering raws li qhov tseem ceeb thiab kev lag luam. Latency yog ib qho nyuaj muag. Koj yeej tsis pom nws thaum mloog nkauj. Thaum saib cov yeeb yaj kiab, cov yeeb yaj kiab kuj qeeb, yog li nws tag nrho syncs.
AirPods
Apple Music qhov kev xaiv tsis tau poob tsis ntev los no tsis ua haujlwm dhau AirPods. Peb tuaj yeem kwv yees tias Apple yuav ntxiv qee qhov txawv ntawm aptX Lossless rau txhua AirPods tshiab, thiab cov lus tshaj tawm yuav yooj yim: suab paj nruag zoo dua.
Tab sis Apple puas yuav tso cai rau cov thev naus laus zis no los ntawm Qualcomm? Qhov ntawd yog qhov nyuaj vim tias ob lub tuam txhab tau sib ntaus sib tua hauv tsev hais plaub tau ntau xyoo. Ib yam yog qhov tseeb, txawm hais tias-Bluetooth suab yog hais txog lub suab zoo dua.
