Puas yog Bluetooth Wireless Suab txo suab nrov?

Cov txheej txheem:

Puas yog Bluetooth Wireless Suab txo suab nrov?
Puas yog Bluetooth Wireless Suab txo suab nrov?
Anonim

Txawm hais tias Bluetooth thev naus laus zis muaj ntau txoj hauv kev kom txaus siab rau lub suab wireless los ntawm cov neeg hais lus thiab lub mloog pob ntseg, qee tus neeg tsis pom zoo rau Bluetooth vim tias, los ntawm lub suab ncaj ncees, koj zoo dua xaiv ib qho ntawm Wi-Fi-based wireless technologies. xws li AirPlay, DLNA, Play-Fi, lossis Sonos. Thaum qhov kev nkag siab ntawd feem ntau yog qhov tseeb, muaj ntau yam siv Bluetooth dua li qhov muag.

A me ntsis txog Bluetooth

Bluetooth tsis yog tsim los rau kev lom zem suab, tab sis txuas lub xov tooj headsets thiab speakerphones. Nws kuj tau tsim nrog lub nqaim bandwidth, uas yuam nws siv cov ntaub ntawv compression rau lub teeb liab suab. Txawm hais tias tus qauv tsim no yuav zoo kawg nkaus rau kev sib tham hauv xov tooj, nws tsis zoo rau kev tsim suab paj nruag. Tsis tas li ntawd xwb, tab sis Bluetooth tuaj yeem siv qhov compression saum toj kawg nkaus ntawm cov ntaub ntawv compression uas twb muaj lawm, xws li los ntawm cov ntaub ntawv audio digital lossis cov peev txheej tau tshaj tawm hauv Is Taws Nem. Tab sis ib qho tseem ceeb uas yuav tsum nco ntsoov yog tias lub kaw lus Bluetooth tsis tas yuav siv qhov compression ntxiv no.

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Ntawm no yog vim li cas: Txhua yam khoom siv Bluetooth yuav tsum txhawb nqa Qis Complexity Subband Coding. Txawm li cas los xij, Bluetooth pab kiag li lawm kuj tseem tuaj yeem txhawb kev xaiv codecs, uas tuaj yeem pom hauv Bluetooth Advanced Audio Distribution Profile specification. Cov kev xaiv codecs tau teev tseg yog: MPEG 1 & 2 Suab, MPEG 3 & 4, ATRAC, thiab aptX. ATRAC yog codec uas tau siv feem ntau hauv Sony cov khoom, tshwj xeeb tshaj yog nyob rau hauv MiniDisc digital kaw hom.

Tus paub MP3 hom ntawv tiag tiag yog MPEG-1 Txheej 3, yog li MP3 raug them raws li qhov tshwj xeeb raws li kev xaiv codec.

Kev xaiv Codecs

Tus qauv Bluetooth tus qauv, ntawm ntu 4.2.2, hais tias: "Lub cuab yeej kuj tseem tuaj yeem txhawb kev xaiv codecs kom ua kom nws siv tau ntau tshaj plaws. Thaum SRC thiab SNK txhawb tib lub Optional codec, cov codec no yuav siv tau los hloov qhov yuav tsum tau ua. codec."

Nyob rau hauv daim ntawv no, SRC hais txog lub hauv paus khoom, thiab SNK yog hais txog lub dab dej (los yog lub hom phiaj) ntaus ntawv. Yog li lub hauv paus yuav yog koj lub xov tooj smartphone, ntsiav tshuaj, lossis khoos phis tawj, thiab lub dab dej yuav yog koj tus hais lus Bluetooth, lub mloog pob ntseg, lossis tus txais.

Los ntawm kev tsim, Bluetooth tsis tas yuav ntxiv cov ntaub ntawv compression rau cov khoom uas twb tau compressed. Yog hais tias ob qho tib si lub hauv paus thiab dab dej pab txhawb lub codec siv los encode tus thawj lub teeb liab, lub suab yuav kis tau thiab tau txais yam tsis muaj kev hloov. Yog li, yog tias koj mloog MP3 lossis AAC cov ntaub ntawv uas koj tau khaws cia hauv koj lub smartphone, ntsiav tshuaj, lossis khoos phis tawj, Bluetooth tsis tas yuav ua rau lub suab tsis zoo yog tias ob qho tib si txhawb hom ntawv ntawd.

txoj cai no kuj siv tau rau hauv xov tooj cua hauv internet thiab streaming suab paj nruag cov kev pab cuam uas encoded nyob rau hauv MP3 los yog AAC, uas npog ntau yam uas muaj nyob rau niaj hnub no. Txawm li cas los xij, qee qhov kev pabcuam suab paj nruag sim nrog lwm hom, xws li Spotify siv Ogg Vorbis codec li cas.

Tab sis raws li Bluetooth SIG, lub koom haum uas tso cai Bluetooth, compression tseem yog tus qauv rau tam sim no. Qhov no feem ntau yog vim lub xov tooj yuav tsum muaj peev xwm xa tsis tau suab paj nruag nkaus xwb tab sis kuj hu nkauj thiab lwm yam kev ceeb toom txog kev hu. Tseem, tsis muaj laj thawj uas cov chaw tsim khoom tsis tuaj yeem hloov los ntawm SBC rau MP3 lossis AAC compression yog tias Bluetooth txais khoom txhawb nqa nws. Yog li cov ntawv ceeb toom yuav muaj qhov compression thov, tab sis MP3 lossis AAC cov ntaub ntawv yuav dhau los tsis hloov pauv.

Dab tsi Txog aptX?

Qhov zoo ntawm lub suab tso suab los ntawm Bluetooth tau txhim kho lub sijhawm. Tam sim no aptX codec, uas yog muag raws li kev hloov kho rau SBC codec, xa "CD-zoo li" suab zoo tshaj Bluetooth wireless. Tsuas yog nco ntsoov tias ob qho tib si Bluetooth qhov chaw thiab cov dab dej dab dej yuav tsum txhawb nqa aptX codec thiaj li tau txais txiaj ntsig. Tab sis yog tias koj tab tom ua si MP3 lossis AAC cov ntaub ntawv, cov chaw tsim khoom yuav zoo dua siv cov qauv ntawm cov ntaub ntawv audio qub yam tsis muaj kev rov encoding ntxiv los ntawm aptX lossis SBC.

Feem ntau cov khoom siv Bluetooth yog tsim tsis yog los ntawm lub tuam txhab uas nws cov neeg ua haujlwm hnav lawv lub npe, tab sis los ntawm cov chaw tsim khoom tsim thawj zaug uas koj tsis tau hnov dua. Thiab tus txais Bluetooth siv nyob rau hauv cov khoom suab tej zaum tsis yog tsim los ntawm ODM, tab sis los ntawm lwm lub chaw tsim khoom. Qhov nyuaj ntawm cov khoom lag luam digital yog, thiab yog tias muaj ntau tus engineers ua haujlwm rau nws, qhov ntau dua yog tias tsis muaj leej twg paub txhua yam txog dab tsi tshwm sim hauv lub cuab yeej. Ib hom ntawv tuaj yeem hloov pauv tau yooj yim mus rau lwm qhov, thiab koj yuav tsis paub nws vim yuav luag tsis muaj Bluetooth txais khoom siv yuav qhia koj seb hom tuaj yog dab tsi.

CSR, lub tuam txhab uas yog tus tswv aptX codec, thov tias aptX-enabled suab teeb liab tau xa tawm pob tshab hla Bluetooth txuas. Txawm hais tias aptX yog ib hom kev compression, nws yuav tsum ua hauj lwm nyob rau hauv ib txoj kev uas tsis zoo heev rau lub suab fidelity piv rau lwm txoj kev compression. aptX codec siv cov txheej txheem tshwj xeeb txo qis qis uas rov ua dua tag nrho cov zaus ntawm lub suab thaum tso cai rau cov ntaub ntawv kom haum los ntawm Bluetooth "pipe" wirelessly. Cov ntaub ntawv tus nqi sib npaug rau cov suab paj nruag CD (16-ntsis / 44 kHz), yog li vim li cas lub tuam txhab sib npaug aptX nrog "CD-zoo li" suab.

Factors Beyond Codecs

Txhua kauj ruam hauv cov saw hlau cuam tshuam rau cov zis ntawm lub suab. Codecs thiab wireless qauv yuav tsum ua hauj lwm nrog kho vajtse uas tej zaum yuav los yog tej zaum yuav tsis tau engineered kom xa cov zis zoo.

Tus aptX codec tsis tuaj yeem them nyiaj rau lub mloog pob ntseg thiab hais lus qis dua, cov ntaub ntawv suab thiab cov peev txheej qis dua, lossis qhov sib txawv ntawm cov khoom siv digital-rau-analog converters pom hauv cov khoom siv. Qhov chaw mloog yuav tsum tau txiav txim siab ib yam nkaus. Txawm li cas los xij qhov kev ncaj ncees tau txais los ntawm Bluetooth nrog aptX tuaj yeem cuam tshuam los ntawm lub suab nrov, xws li cov khoom siv khiav, HVAC system, tsheb khiav tsheb, lossis kev sib tham nyob ze. Nrog rau qhov ntawd, nws yuav tsim nyog xaiv Bluetooth hais lus raws li cov yam ntxwv thiab lub mloog pob ntseg raws li kev nplij siab es tsis yog codec compatibility.

Thaum Bluetooth raws li feem ntau siv ua kom txo qis lub suab zoo rau qib sib txawv, nws tsis tas yuav. Nws yog feem ntau mus txog rau cov tuam txhab tsim khoom siv Bluetooth hauv txoj hauv kev uas txo qis suab nrov tsawg - lossis nyiam dua, tsis yog txhua. Tom qab ntawd koj yuav tsum xav txog tias qhov sib txawv me ntsis ntawm cov suab codecs tuaj yeem nyuaj rau hnov, txawm tias ntawm lub kaw lus zoo tiag tiag. Hauv ntau lub sijhawm, Bluetooth yuav tsis muaj qhov cuam tshuam loj rau lub suab zoo ntawm lub cuab yeej suab. Tab sis yog tias koj puas muaj kev tshwj tseg thiab xav tshem tawm txhua qhov kev tsis ntseeg, koj tuaj yeem txaus siab rau cov suab paj nruag los ntawm kev sib txuas cov chaw siv lub suab cable.

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