Yuav ua li cas xaiv ib tug Bluetooth ntaus ntawv rau mloog suab paj nruag

2024 Tus sau: Malcolm Clapton | [email protected]. Kawg hloov kho: 2023-12-17 03:58

Wireless suab tau dhau los ua ntau qhov chaw. Yuav ua li cas kom tsis txhob tsis meej pem nyob rau hauv loj ntawm cov khoom tshiab, xyuam xim rau cov yam ntxwv tseem ceeb thiab xaiv ib tug dlej ntaus ntawv rau mloog nkauj, peb yuav qhia rau koj nyob rau hauv no tsab xov xwm.

Txhua lub suab pib los ntawm qhov chaw. Niaj hnub no muaj ntau lub wireless raws tu qauv rau kev xa suab. Qee tus ntawm lawv yog qhov nthuav ntau dua li Bluetooth, tab sis tseem tsis tau txais kev faib tawm kom raug. Niaj hnub no yuav luag tag nrho cov smartphones, laptops thiab ntsiav tshuaj tau nruab nrog Bluetooth, thiab nws yuav siv sijhawm tsib feeb los nruab ib lub cuab yeej nrog nws cov kev txhawb nqa yog tias muaj USB tso tawm.

Yog li ntawd, niaj hnub no peb yuav txwv peb tus kheej rau lub suab-reproduced li siv lub "xiav hniav" (cov lus qhia yog heev haum rau xaiv ib tug Bluetooth hais lus). Cov thev naus laus zis no muaj keeb kwm ntev ntev thiab ntau qhov pitfalls, lub hav zoov uas cov neeg siv tsis tas yuav paub.

Lub xub ntiag ntawm Bluetooth transmitter tsis txhais hais tias lub cuab yeej siv tau los ua lub suab nrov rau cov khoom siv suab wireless. Tsis yog txhua lub Bluetooth yuav tso cai rau koj mloog cov suab paj nruag zoo yam tsis muaj kev cuam tshuam. Tsis yog txhua leej txhua tus yog haum rau mloog cov ntaub ntawv nrog siab bitrate thiab lossless tawm tswv yim.

Yuav nrhiav dab tsi thiaj li mloog tau suab paj nruag wirelessly - txawm tias nws tsuas yog MP3 lossis cov ntaub ntawv zoo nkauj los ntawm cov ntaub ntawv yas, peb yuav qhia rau hauv kab lus no.

Cia peb pib nrog qhov tseem ceeb tshaj plaws: qhov ntsuas no ncaj qha hais tias nws puas tuaj yeem mloog nkauj siv lub cuab yeej.

Bluetooth version

Hauv cov khoom siv niaj hnub no, feem ntau koj tuaj yeem nrhiav kev txhawb nqa rau Bluetooth 3.0 lossis 4.0, hauv qee lub smartphones sab saum toj thiab lwm yam khoom siv - 4.1. Hauv qhov no, nws yuav zoo dua tias lub mloog pob ntseg yuav tsuas txhawb kev sib txuas siv raws tu qauv version 2.1. Cov adapters rov qab tau sib xws, tab sis cov txheej txheem qeeb tshaj plaws ntawm ob ua haujlwm thaum txuas nrog.

Qhov sib txawv ntawm cov versions ntawm cov txheej txheem rau cov neeg siv nruab nrab yog tsawg vim yog rov qab compatibility. Qhov tseem ceeb uas ntes koj lub qhov muag yog tias nrog txhua tus tshiab lub zog siv ntawm cov khoom siv txo qis, thiab pib ntawm 3.0 ib qho thib ob module tau ntxiv rau kev hloov cov ntaub ntawv ceev ceev ntawm 24 Mbps.

Version 2.1 + EDR xa cov ntaub ntawv ntawm tus nqi tsis tshaj 2.1 Mbit / s. Qhov no yog txaus los ua si ib tug tsawg bitrate suab kwj. Nws raug nquahu kom siv Bluetooth version 3.0 lossis siab dua rau suab thiab video streaming.

Nws yuav tsum raug sau tseg tias rau kev siv tag nrho ntawm cov cuab yeej ua ib tus neeg ua si, nws yog qhov tsim nyog kom muaj Bluetooth version 4.0 lossis siab dua, lossis zoo dua - nrog kev siv hluav taws xob tsawg.

Lub adapter no tuaj yeem txheeb xyuas los ntawm pawg hauv qab no.

Bluetooth profiles

Profiles yog ib phau ntawm cov haujlwm tshwj xeeb txhawb nqa los ntawm cov khoom siv. Ntawm tag nrho cov uas siv hauv Bluetooth mloog suab paj nruag, cov hauv qab no yog qhov nthuav:

1. Headset Profile (HSP)Nws yog qhov tsim nyog rau kev sib txuas lus ntawm lub mloog pob ntseg thiab lub xov tooj smartphone thiab wireless kis tau tus mob mono suab nrog tus nqi qis ntawm 64 kbps.
2. Hands-Free Profile (HFP)kuj muab mono kis tau tus mob xwb, tab sis nrog zoo dua.
3. Advanced Audio Distribution Profile (A2DP)xav tau rau ob-channel suab streaming.
4. Suab / Video Chaw Taws Teeb Tswj Profile (AVRCP) muab kev tswj hwm kev ua haujlwm ntawm cov khoom siv playback (tsis muaj nws, txawm tias hloov lub ntim ntawm cov suab paj nruag yog tsis yooj yim sua).

A2DP yuav tsum tau mloog tag nrho cov nkauj. Nws tsis tsuas yog tswj kev sib kis ntawm lub suab kwj, tab sis kuj tswj cov compression ntawm cov ntaub ntawv ua ntej kis tau tus mob.

Txawm li cas los xij, txawm tias ob qho tib si kis tau tus mob thiab ua si ntaus ntawv (piv txwv li, lub xov tooj smartphone thiab lub mloog pob ntseg wireless) tau nruab nrog Bluetooth 3.0 lossis 4.0 thiab txhawb nqa cov txheej txheem xav tau, koj yuav tsum tau them sai sai rau cov codec uas siv.

Bluetooth codecs

Qhov tseem ceeb tshaj plaws rau kev ua si suab paj nruag siv A2DP raws tu qauv yog lub codec uas compresses lub suab xa mus rau lub mloog pob ntseg. Tam sim no muaj peb codecs nyob rau hauv tag nrho:

1. Subband Coding (SBC) - tus codec siv los ntawm A2DP los ntawm lub neej ntawd thiab tsim los ntawm tus tsim tawm profile. Hmoov tsis zoo, SBC muaj lub siab rougher dua MP3. Thiab yog li ntawd, nws tsis haum rau kev mloog nkauj.
2. Advanced Audio Coding (AAC) - tus codec siab dua uas siv cov kev sib txawv compression algorithms. Suab zoo tshaj SBC.
3. Aptx - ntawm no nws yog, txoj cai xaiv! Tsawg kawg yog vim muaj peev xwm hloov cov ntaub ntawv rau MP3 thiab AAC yam tsis muaj kev tswj hwm thiab kev hloov pauv ntxiv. Qhov no txhais tau tias, thiab tsis muaj degradation ntawm lub suab. Txawm li cas los xij, nws tsim nyog ua kev tshwj tseg. Muaj ntau ntau versions ntawm aptX los ua si sib txawv bitrates. Txhua tus ntawm lawv yog npaj rau nws tus kheej lub suab kwj.

Version	Tus naj npawb ntawm cov channel txhawb	Qhov ntsuas qhov ntsuas siab tshaj plaws, kHz	Quantization, ib	Max bitrate	Compression ratio
Aptx	2	44, 1	16	320 kbps	2:1
Txhim kho AptX	2, 4, 5.1, 5.1+2	48	16, 20, 24	mus txog 1,28 Mbit / s	4:1
Aptx live	n / ua	48	16, 20, 24	n / ua	8:1
Aptx lossless	n / ua	96	16, 20, 24	n / ua	n / ua
AptX Tsawg Latency	n / ua	48	16, 20, 24	n / ua	n / ua

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Cov yam ntxwv tseem ceeb ntawm ob lub xeem dhau los ntawm lub codec yog qhov qis tshaj plaws tau latency ntawm lub suab playback thiab txo cov load ntawm lub processor thaum encoding. Lub Low Latency version ua tiav 32ms latency ntawm lub suab kwj qhov chaw thiab cov khoom siv rov qab. Qhov no yuav txo qhov distortion qhia los ntawm cov khoom siv thaum mloog nkauj.

Yog li, nrog qee qhov kev nyiam, koj tuaj yeem xaiv ib qho codec. Yog tias qhov kev ua si ntawm cov kwj tsis poob tsis xav tau, thiab lub suab latency siab tsis yog qhov tseem ceeb, koj yuav tsum txwv koj tus kheej rau tus qauv aptX thiab tsis txhob them nyiaj ntau rau kev txhawb nqa los ntawm lub cuab yeej rau cov ntawv txuas ntxiv.

Nws tsim nyog nco ntsoov tias qhov xav tau profile thiab codec yuav tsum tau txais kev txhawb nqa los ntawm lub xov tooj smartphone (lossis lwm lub suab kwj) thiab los ntawm lub mloog pob ntseg (lossis Bluetooth hais lus). Txwv tsis pub, A2DP algorithm yuav cia li pib siv SBC.

Ob qho khoom siv nrog Bluetooth ib txwm ua haujlwm siv cov ntawv qis tshaj plaws, codec yooj yim tshaj plaws thiab raws tu qauv. Yog li, yog tias ib qho ntawm lawv tsis txhawb nqa cov thev naus laus zis uas xav tau, koj yuav tsis tuaj yeem txaus siab rau lub suab zoo.

Txhawm rau mloog nkauj rau lub sijhawm ntev, yuav tsum muaj tsawg kawg Bluetooth 3.0 txhawb nqa, aptX codec thiab A2DP profile. Txhawm rau mloog cov suab paj nruag bitrate siab, koj yuav tsum tau txhawb nqa lub aptX Lossless codec - ob qho tib si yuav tsis ua haujlwm, vim tias cov suab paj nruag yuav raug compressed thaum hloov mus rau lub playback ntaus ntawv.