Muaj Lus Txhais Multimedia Muaj Peev Xwm Tshaj Tawm (Lus Askiv: Muaj Lus Txhais multimedia Interface, HDMI) yog digital video / audio interface technology. Nws yog tshwj xeeb digital interface haum rau kev xa duab. Nws tuaj yeem xa cov audio thiab cov duab hauv tib lub sijhawm. Qhov siab tshaj plaws cov ntaub ntawv xa xov nrawm yog 2.25 GB / s, thiab tsis tas yuav tsum ua qhov hloov digital / analog lossis analog / digital hloov ua ntej xa xov xwm.
HDMI tuaj yeem siv nrog Broadband Digital Cov ntsiab lus tiv thaiv (HDCP) kom tsis txhob muaj kev txwv tsis pub luam tawm ntawm cov ntsiab lus audio thiab video.
Qhov chaw sau ntxiv los ntawm HDMI tuaj yeem siv cov suab thiab yees duab tawm qauv uas yuav txhim kho yav tom ntej.
Thiab vim tias muaj yeeb yaj kiab 1080p thiab muaj 8-channel audio teeb liab xav tau qis dua 0.5GB / s, HDMI tseem muaj cov paj tau paj ntau. Qhov no tso cai nws txuas cov DVD player, tus txais thiab PRR cais nrog ib tus cable.
Txoj kev qhia kom paub tus txheej txheem
[1] HDMI Kev Tso Cai, LLC tau tshaj tawm HDMI cov lus qhia tshwj xeeb rau ntu 1.4a rau Lub Peb Hlis 4, 2010 sawv cev ntawm thawj cov tswv yim txhim kho HDMI. Cov yam ntxwv suav nrog kev txhim kho qhov tseem ceeb rau 3D daim ntaub ntawv siv, qhov sib ntxiv ntawm qhov yuav tsum tau siv 3D hom kev tshaj tawm cov ntsiab lus, thiab Top-and-Bottom 3D format.
Txij li lub sijhawm" HDMI 1.4" yog qhov dav heev los qhia cov kev txhawb nqa thev naus laus zis ntawm lub cuab yeej, kev siv cov lej naj npawb cim cov tswv yim xws li" HDMI 1.4" yog kiag li txwv tsis pub siv rau hauv qhov tshwj xeeb no. Raws li cov ntawv tshiab ntawm" Lub Cim Kev Lag Luam thiab Logo Kev Siv Cov Khoom Siv Tshwj Xeeb", HDMI cable cov tuam txhab txwv tsis pub siv cov version lej qhia tawm thaum muag thiab txhawb HDMI version 1.4 txheem cables, thiab cov qub version ntawm cable yuav tsum tshem tag nrho cov version tus lej cim. tsis pub dhau ib xyoos Cov Ntawv cim, cov lus qhia, ntim, thiab lwm yam.
Rau HDMI cov khoom siv dua li ntawm cov xaim hluav taws xob, txhua tus lej xov tooj yuav tsum tau muab tshem tawm ua ntej Lub Ib Hlis 1, 2012. Ua ntej qhov no, cov tuam txhab tsim khoom yuav tsum siv cov naj npawb version cov cim nyob rau hauv qhov khoom ua ntej kom pom tseeb cov thev naus laus zis siv, xws li"" HDMI v.1.4 nrog Suab Xa Channel thiab HDMI Ethernet Channel" (HDMI version 1.4 txhawb ARC audio xa rov qab channel thiab HEC Ethernet Channel), tab sis cov ntsiab lus&dav dav; HDMI v.1.4 tau raws" (tau tshaj HDMI 1.4) txwv tsis pub ua.
Suav Canonical Npe
Muaj 5 hom HDMI 1.4 cable. Cov qauv txheej txheem kev txheeb xyuas yog:
Txheem HDMI Cable Suav lub npe tshwj xeeb: Txheem HDMI cable (txog li 1080 / 60i)
Standard HDMI Cable nrog Ethernet Txheem HDMI Cable nrog Ethernet
Standard Automotive HDMI Cable Txheej Txheem Automotive HDMI Cable
Kev kub ceev HDMI Cable (txhawb 1080p, DeepColor, 3D)
Kev kub ceev HDMI Cable nrog Ethernet
Tom Qab
Thaum Lub Plaub Hlis 2002, Hitachi, Panasonic, Philips, Silicon Duab, Sony, Thomson, thiab Toshiba koom ua ke tsim HDMI High-Definition Multimedia Interface Lub Koom Txoos, thiab tau pib tsim kho tshiab digital video / audio interface technology uas ua raws rau lub siab txhais. Cov. Tom qab ntau tshaj li ib nrab xyoo ntawm kev npaj, HDMI lub koom haum tshaj tawm qhov tseeb ntawm HDMI 1.0 version ntawm tus qauv rau lub Kaum Ob Hlis 9, 2002, kos lub cim nkag ntawm HDMI thev naus laus zis rau hauv keeb kwm theem.
Cov lus qhia ntawm HDMI thev naus laus zis tsis yog qhov coj cwj pwm ntawm cov tuam ntxhab ntawm whim. Ntawm qhov tsis tooj, muaj ntau qhov tob-tob vim li cas tom qab kev qhia tawm ntawm HDMI thev naus laus zis.
Lub Plaub Hlis 1999, txhawm rau ua kom tau raws li qhov yuav tsum tau ua kom tau zoo ntawm daim duab nyob hauv lub hnub nyoog digital, DDWG (Digital Display Working Group) digital display ua haujlwm pab pawg raws li cov ntawv sau thev naus laus zis ntawm Silicon Image ntawm Tebchaws Asmeskas, tau tsim ib hom tshiab hu ua DVI (Digital Visual Interface) Qhov kev sib cuam tshuam ua kom muaj kev sib koom ua ke ntawm digital display interface tus qauv ntawm lub sijhawm tshiab. Cov cuab yeej no tau txais kev txhawb nqa ntau lub tuam txhab loj hauv IT kev lag luam xws li Intel, DELL, HP, IBM, thiab Microsoft. Tom qab ntau tshaj 3 xyoos ntawm kev nce qib, DVI thev naus laus zis tau siv sai hauv thaj chaw ntawm cov khoom lag luam tawm hauv computer. Txawm li cas los xij, nrog txoj kev txhim kho digital-txhais tau zoo tshaj plaws audio-visual technology, DVI interface tau maj mam nthuav tawm ntau yam teeb meem, thiab tau dhau los ua qhov kev nce qib ntawm cov thev naus laus zis thev naus laus zis rau qee yam. txhauv.
Cov teeb meem tseem ceeb nrog DVI interface yog:
* DVI interface txiav txim siab rau PC, uas feem ntau sib xws nrog lub tiaj tiaj hauv TV.
* DVI interface tsis muaj kev txhawb nqa rau kev tiv thaiv cov duab duab.
* DVI interface tsuas yog txhawb nqa 8bit RGB teeb liab kis, uas tsis tuaj yeem tso cai dav dav gamut zaub davhlau ya nyob twg kom nws ua haujlwm tau zoo tshaj.
* Rau kev txiav txim siab sib xyaw, DVI interface muaj txiaj ntsig ntau lub pins los pab txhawb cov khoom siv analog, uas ua rau muaj qhov interface loj thiab tsis tshua muaj kev ua haujlwm.
* DVI interface tsuas tuaj yeem xa cov duab txuas, thiab tsis xav txog kev txhawb nqa ntawm digital audio cov cim rau txhua lub sijhawm.
Vim tias cov ntsiab lus saum toj no luv luv, DVI interface tsis tuaj yeem ua tau zoo dua qhov kev xav tau ntawm kev txhim kho ntawm tag nrho kev lag luam. Yog li no, txawm hais tias nws yog IT manufacturers, tiaj tus vaj huam sib luag TV chaw tsim khoom, lossis ntau tus tshaj tawm hauv Hollywood, muaj qhov kev xav tau ceev nrawm rau cov thev naus laus zis zoo dua uas tuaj yeem ua raws li kev txhim kho yav tom ntej ntawm kev lag luam siab txhais video. Nws yog rau cov laj thawj no uas HDMI tus qauv nce. Yug Los.
Kev zoo
HDMI tsis tuaj yeem tsuas yog daws tau qhov daws teeb meem ntawm 1080P, tab sis kuj txhawb nqa cov qauv digital audio xws li DVD Audio, txhawb 8-channel 96kHz lossis stereo 192kHz digital audio kis, thiab tuaj yeem xa cov suab tsis sib xws thiab cov cim video. HDMI tuaj yeem siv rau kev teeb tsa hauv thawv sab saum toj, DVD player, khoos phis tawj rau tus kheej, TV ua si, sib xyaw ua ke, digital audio thiab TV teeb tsa. HDMI tuaj yeem xa cov cim qhia audio thiab video tib lub sijhawm.
HDMI txhawb EDID thiab DDC2B, yog li cov khoom siv nrog HDMI muaj" ntsaws thiab ua si" nta. Qhov chaw teeb liab thiab cov khoom ntsuas yuav cia li" sib khom" kom cia li xaiv qhov tsim nyog tshaj tawm video / audio.
Piv nrog rau DVI, HDMI interface muaj lub ntim me dua, thiab cov kab xev ntev ntawm HDMI / DVI yuav tsum tsis pub tshaj 8 meters. Ntev npaum li ib HDMI cable tuaj yeem hloov txog li 13 kab txuas kis kab, nws tuaj yeem daws cov teeb meem ntxhov thiab ntxhov ntxhov nyob tom qab kev tsim kho hauv tsev.
Teeb meem sib piv
Tau Txais (Rx) kev xeem
Cov ntsiab lus rau kev saib xyuas hauv EDID ntsig txog cov ntawv xeem
Thaum lub sij hawm xeem cov txheej txheem, cov khoom no cuam tshuam nrog kuaj EDID feem ntau swb. Yog tias koj paub txog qhov tsim nyog ua tau ntawm cov lus piav qhia, nws yog qhov kis yooj yim. Piv txwv, cov teeb meem tshwj xeeb tsim nyog yuav tsum tau tias" Soj Ntsuam Txwv Txwv Taub Hau" thiab" Saib Xyuas Lub Npe Header" yuav tsum muab thawj 128 bytes ntawm EDID, tab sis yog tias cov ntsiab lus ntawm ob yam khoom no tsawg dua 18 bytes feem, lawv yuav tsum xaus nrog 0x0A tib lub sijhawm, sau cov bytes seem nrog 0x20. Lwm qhov teeb meem feem ntau ntsib hauv EDID kuaj yog tias cov yeeb yaj kiab luv duab piav qhia (SVD) hauv EDID tsis tuaj yeem ua tau raws li daim ntawv tshaj tawm xa daim ntawv muaj peev xwm (CDF). CDF qhia tau tias hom ntawv txhawb nqa yog nyob hauv SVD module ntawm EDID. Nws tsis muaj qhov qhia tias yog kev txhawb, lossis hloov ua lwm yam.
TMDS teeb liab plawg plawg impedance txuam
Thaum tsim cov ntawv cog lus Circuit Court, qhov yuav tsum tau ua ntawm TMDS teeb liab sib txawv impedance txuam yog suav tias yog, tab sis nws feem ntau tsis ua tiav rau qhov kev ntsuas no vim tias xaiv cov khoom tiv thaiv ESD lossis cov cab muaj peev xwm ntawm cov hom tsis xws li txhawm rau siv los txhawm rau EMI loj dhau. Ua rau qhov kev sim no poob. Impedance test chart, koj tuaj yeem nug cov tuam ntxhab no los muab cov ntaub ntawv cuam tshuam.
DDC / CEC channel capacitance voltage ntsuas
Qhov kev ntsuas no muaj qhov ua haujlwm poob siab heev. Cov laj thawj rau qhov tsis ua hauj lwm feem ntau vim tias lub zog ntawm MOSFET cov cuab yeej siv rau qib hloov pauv loj heev. Nws raug pom zoo tias MOSFET ntaus ntawv Ciss thiab Coss siv hauv DDC channel yuav tsum qis dua 10pF.
HPD tso zis hluav taws xob
Hauv txoj cai ntawm hdmi, raws li thaum hdmi hd5V cov tswv yim yog 0V, qhov HPD voltage yuav tsum ntau dua 0V thiab tsawg dua 0.4V. Txoj kev yooj yim ntawm no yog txuas rau the5V voltage ntawm HDMI input chaw nres nkoj hauv series nrog 1K resistor thiab qhia nws ncaj qha rov qab mus rau HPD tus pin. Nws raug nquahu kom siv qhov yooj yim triode hloov Circuit Court los tswj HPD tus pin, uas tuaj yeem nquag qhia lub chaw ntaus ntawv tsis hais tias cov cuab yeej nqes tau npaj los sis ceeb toom cov cuab yeej los rov pib qee qhov kev ua pov thawj, xws li HDCP, thiab lwm yam, uas tuaj yeem txhim kho cov cuab yeej ua tau zoo sib xws.
Yees duab hom txhawb
Hauv qhov kev ntsuas no, cov qauv yeeb yaj kiab uas tuaj yeem txhawb los ntawm txhua HDMI cov chaw nres nkoj nkag yuav raug kuaj 50Hz ± 0.5% (piv txwv li 49.75Hz thiab 50.25Hz) rau cov khoom siv uas txhawb 50Hz, thiab 59.94-0.5% rau cov khoom siv uas txhawb nqa 59.94Hz lossis 60Hz (Ntawd yog, 59.64Hz) thiab 60+0.5% (piv txwv li 60.3Hz) thaj chaw hloov pauv zaus muaj peev xwm txhawb tau. Yuav tsum tau them sai sai rau cov kev xav tau ntawm video format kam rau hauv software tsim.
Qhov chaw sim (Tx)
EDID ntsig txog kev xeem
Lub HDMI qhov khoom siv yuav tsum txhawb nqa" Txhim Kho DDC" raws tu qauv, uas yog, thaum nyeem EDID cov lus qhia ntawm lub cuab yeej tau txais, ntu ntu 0x60 tuaj yeem siv los nyeem cov ntaub ntawv tom qab thawj 256 bytes. Txawm hais tias cov neeg siv feem ntau siv 256 bytes ntawm EDID cov ntaub ntawv, kev soj ntsuam hdmi yuav pom tias muaj peev xwm nyeem 4 block (128 bytes txhua), uas yog, 512 bytes ntawm cov ntaub ntawv. Seb puas muaj ntau cov ntaub ntawv tuaj yeem kawm tau los ntawm 0x7E chaw nyob ntawm EDID cov ntsiab lus. Thaum kuaj, tsuas yog muaj peev xwm los txhawb thawj 256 bytes feem ntau sim, thiab qhov yuav tsum tau rau ntu ntu taw yog tsis quav ntsej.
+5V tso zis hluav taws xob
Tsis txhob txuas lub resistor nyob rau hauv series nrog lub zog tawm txoj kev ntawm HDMI tso zis chaw nres nkoj. Cov lus piav qhia tshwj xeeb tshaj tawm tias lub nra uas rub tawm 55mA qhov tam sim no txuas thaum lub sijhawm ntsuas hdmi Tx, thiab tom qab ntawd cov zis hluav taws xob tau kuaj. Qhov xav tau qhov hluav taws xob nyob nruab nrab ntawm 4.8V thiab 5.3V. Yog tias 10 ohm resistor txuas nrog hauv kab thiab cov zis hluav taws xob yog 5-10x0.055=4.45V< 4.8v,="" qhov="" kev="" ntsuas="" no="">
Ntsuas nrog DDC / CEC ntsuas
Thaum muaj kev sib cuam tshuam nrog cov neeg siv khoom siv hluav taws xob tswj (CEC) tus pin ntawm HDMI chaw nres nkoj, uas yog, 13th tus pin ntawm HDMI chaw nres nkoj, yog tias cov khoom lag luam tsis txhawb CEC kev ua haujlwm, tus pin no tuaj yeem sab laug ntab. Txawm li cas los xij, qee cov khoom lag luam feem ntau txuas tus pin no rau lub ntsiab-dav tus pin ntawm lub ntsiab ua khoom siv txawm hais tias nws tsis txhawb CEC ua haujlwm. Nws yog npaj rau yav tom ntej nthuav. Lub sijhawm no, koj yuav tsum tau them sai sai rau qee qhov kev txwv ntawm kev ntsuas hluav taws xob thiab lub cev kev sib txuas ntawm tus pin no. Piv txwv li, tus neeg muaj peev xwm xav tau tsawg dua 100pF, thiab lwm yam, txwv tsis pub hdmi xeem yuav poob.
qhov zoo dua
Qhov zoo ntawm kev siv HDMI video interface
Qhov zoo ntawm HDMI dhau los ntawm cov kab yees duab analog tam sim no xws li kev sib txuas ua ke, S-Video thiab yees duab tivthaiv:
1. Cov Khoom Zoo: HDMI yog digital interface. Txij li txhua qhov sib txuas analog (xws li tivthaiv video lossis S-video) yuav tsum tsis muaj kev poob thaum hloov mus los ntawm analog rau digital, nws tuaj yeem muab cov video zoo tshaj plaws. Qhov kev sib txawv no yog tshwj xeeb tshaj yog pom ntawm cov kev daws teeb meem ntau dua, xws li 1080p. Cov vis dis aus yuav pom meej dua li cov yees duab tiv thaiv, tshem tawm qhov muag muag thiab pleev ua rau pom ntawm cov yeeb yaj kiab tiv thaiv. Cov ntawv me me, kev cuam tshuam zoo xws li cov ntawv nyeem coj qhov sib txawv no rau qhov sib txawv.
2. Yooj yim ntawm kev siv: HDMI sib xyaw ua ke video thiab ntau channel tso rau hauv tib cable, yog li tshem tawm tus nqi, qhov nyuaj thiab tsis meej pem ntawm cov ntau-cable siv nyob rau hauv cov kab ke A / V tam sim no. Qhov no yog qhov tshwj xeeb tshaj yog thaum txhim kho lossis ntxiv cov khoom siv.
3. Kev txawj ntse siab: HDMI txhawb ob txoj kev sib txuas lus ntawm cov vis dis aus (xws li DVD player) thiab DTV, paub qhov haujlwm tshiab, xws li tsis siv neeg configuration thiab rov ua ib qho tseem ceeb. Los ntawm kev siv HDMI, lub cuab yeej cia li xa cov qauv siv tau zoo tshaj plaws (xws li 480p vs 720p, 16: 9 vs 4: 3) rau cov khoom sib txuas? Tshem tawm txoj kev xav tau rau cov neeg siv khoom noj khoom noj kom hla dhau ntawm txhua hom kev xaiv los twv qhov zoo tshaj plaws saib hom.
4. Cov ntsiab lus siab txhais tau npaj: HDMI cov khoom siv uas txhawb nqa HDCP tuaj yeem nkag mus rau cov ntsiab lus siab txhais, uas coj peb me ntsis kev nplij siab. HD-DVD thiab Blu-ray tau ncua kev ua kom daim duab boycott cim (tseem hu ua lub ntsiab lus tiv thaiv kev tiv thaiv) rau hnub no' s siab txhais cov yeeb yaj kiab los pab txo cov teeb meem tshwm sim los ntawm kev hloov dua siab tshiab, tab sis cia siab tias lub cim no yuav raug qhib nyob rau ob peb xyoos, Uas txhais tau tias yav tom ntej cov yeeb yaj kiab siab yuav tsis muaj peev xwm ua si hauv kev txhais cov ntsiab lus los ntawm kev tiv thaiv tsis muaj kev cuam tshuam (xws li cov khoom sib piv).
daim ntawv thov
HDMI tau siv thawj zaug xyoo 2002 kom tau txais cov yeeb yaj kiab zoo dua qub thiab cov kab ke digital audio kom tau raws li qhov xav tau ntawm cov neeg siv. Ntau lub TV txawv, khoos phis tawj thiab khoom siv hluav taws xob tau tsim los ntawm HDMI qhov tshwj xeeb. Cov qauv no feem ntau piav qhia txog lub koom haum cov khoom lag luam hauv tshuab hluav taws xob hauv kev koom tes nrog cov tuam txhab nkauj loj thiab cov yeeb yaj kiab faib tawm. EIA / CEA -861 tus qauv siv los ntawm HDMI txiav txim siab cov duab vis dis aus thiab cov qauv, cov ntaub ntawv pabcuam, cov ntaub ntawv ua haujlwm tsis meej thiab tsis ua rau kev thauj mus los, thiab LPCM audio.
Muaj ob hom sib txawv ntawm cov ua rau lub lag luam, uas yog qeb 1 thiab 2. Cov pawg no tsuas yog siv rau version 1.3 thiab siab dua, uas yog xyoo 2008. Qeb 1 cable dais txheem HDMI cable cim cov ntawv thiab yog qhov haum rau xa tawm 720p lossis 1080i video thiab suab tseg. Cov ntaub ntawv hauv tshooj ob tseem suav tias yog kev ceev nrawm, thiab tuaj yeem nqa cov kab xev video thiab audio, 720p thiab 1080i thiab 1600P. Kev faib tawm ntawm ob txoj hlua HDMI yog tib hom uas tau lees tias yuav ua haujlwm nrog cov hlua txuas ntev dua 16 ko taw.
Vim tias cov xeeb ceem ntawm lub teeb liab, cov hlau lead ntev yuav tsum muaj qee qhov kev txwv. Cov kab xev uas ntev dhau mus xa tau cov xov tooj digital tsis muaj zog, uas ua rau cov duab dig rau lub vijtsam. Siv cov HDMI txuas ntxiv, sib luag lossis rov ua kom tsis txhob muaj teeb meem ntawm cov teeb liab poob. Cov cuab yeej no tuaj yeem txuas nrog sib txuas nrog cov kab hluav taws xob, yog li txuas ntxiv qhov ntev ntawm lub cable tsis poob lub teeb liab lub zog. Qhov ntev tshaj plaws uas tuaj yeem siv tau yog nyob ntawm seb hom cable. Hauv qeb 5 lossis qeb 6, tag nrho cov kab ntev yuav raug nce ntxiv rau 164 ko taw. Yog tias qhov kev nthuav dav nce raws li qhov kho qhov muag, tag nrho cov xov kab ntev mus txog 328 ko taw.
Yuav cov txuj ci
kauj ruam 01: Txhawm rau paub meej tias lub version ntawm HDMI cable, them sai sai rau lub version ntawm HDMI cable. Muaj peb qho qauv siv 1.3, 1.4 thiab 2.0. Nws raug nquahu kom yuav version 2.0 HDMI cable nrog lub bandwidth txog 21.8Gbps, txhawb nqa 3D kis, tuaj yeem ntsib qhov siab dua, tus nqi kho dua tshiab thiab qhov tob xim, tuaj yeem txhawb HD playback saum 1080P, thiab tau tshaj 1.3 thiab 1.4 lub luag haujlwm.
kauj ruam 02: Them rau qhov loj ntawm HDMI interface
HDMI interfaces tau muab faib ua cov qauv nres nkoj thiab cov chaw nres nkoj me me. Vim tias qhov kev txwv me me, HDMI cov chaw nres nkoj ntawm HD MP4 yog qhov chaw nres nkoj me me, yog li yog tias koj xaiv HDMI cable rau HD MP4, koj yuav tsum pom tus qauv-mini HDMI cable, txwv tsis pub nws yuav tsis txuas rau.
kauj ruam 03: Lub HDMI cable tsis ntev li ntev tau
Qhov theoretical kis nrug ntawm ib qho HDMI cable yog 7-8 metres, tab sis hauv kev siv tiag tiag, nws tsis tas yuav ntev li ntawd. Ua ntej yuav khoom, nws yog qhov zoo tshaj plaws los ntsuas qhov ntev uas yuav tsum tau, tsuav qhov ntev txog 50 cm yog txaus rau qhov ntsuas ntsuas.
kauj ruam 04: Xaiv hom HDMI cable, ntau kev txhawj xeeb tsis pub
Yog tias koj pom tias nws nyuaj rau kev txiav txim siab uas HDMI cable zoo dua los yog phem dua nrog koj tus kheej lub qhov muag, txoj hauv kev yooj yim yog xaiv lub hom phiaj HDMI cable, xws li eda, Yabao, Fujicables, Dab thiab lwm hom npe. Qhov zoo yog heev lav!
kauj ruam 05: Zam kev khoov tawm ntawm cov HDMI cables ntau dhau
Lub sijhawm siv ntawm HDMI cable, zam kev muaj peev xim ntawm ntuav ntawm cov cable. Piv txwv, ntau zaus folding thiab winding yuav ua rau lub hauv paus lossis cov thaiv cov txheej ntawm cov kab. Feem ntau khoov raws arc yam tsis muaj kev cuam tshuam rau cable.