S / PDIF - yog dab tsi?

Niaj hnub no, muaj ntau li ntau slots, thiab connectors uas yog tej thaum nyuaj rau nrog ib tug ntawm lawv. Piv txwv li, muaj ntau feem ntau teeb meem nrog rau cov purchase ntawm ib tug tshiab devaysa thiab xa mus rau nws tej yam ntxiv kiag li lawm. Niaj hnub no peb yuav kawm txog cov S / PDIF - uas yog, rau dab tsi thiab vim li cas.

notion

Nws yog nthuav tias ib tug thoob ntiaj teb txuj yuav siv tau raws li ib tug variant ntawm S / PDIF, thiab S / PDIF. Nws yog nthuav nws seev suab, uas ua kom peb to taub li cas cov txheej txheem tau tsim. Sony / Philips Digital Interface hom yuav ib tug txheej ntawm raws tu qauv ciaj ciam mus rau kho vajtse siv. Nws muaj lub peev xwm los hloov cov suab los ntawm cov thawj suab ntaus ntawv mus rau lub thib ob.

Xav lub S / PDIF, peb yuav nrog nws thiab lub cev yog ib feem ntawm lub system. Lub cev vaj tse ua rau nws tau paub txoj kev uas lub teeb liab yog kis tau thiab los ntawm kev uas raws, thiab cov system - cov raws tu qauv siv.

specification

Ua ntej tshuaj ntsuam lub Scope ntawm no interface, peb twb paub lawm cas nws twb ua. Nyob rau hauv Feem ntau, hom ntawv no tso cai rau ntau hom cables thiab connectors. Yog li ntawd lub ntiaj teb no yog muaj ib cov S / PDIF, coaxial thiab kho qhov muag. Muaj tag nrho cov kev xaiv nyob rau hauv lub tsim nyog adapters thiab adapter. Tej zaum tsis muaj coaxial kho qhov muag siv, thiab vice versa. Qhov tshaj plaws xwb uas, nyob rau hauv tas li ntawd mus rau lub adapters yuav tsum tau ib tug sab nraud fais fab mov.

txiv

Cov kev loj hlob ntawm no interface pib nrog ces uas twb muaj lawm kev AES / EBU txheem. Cipher thawj los ua lub npe hu nyob rau hauv 1986. Tom qab ntawd peb tau ua hauj lwm rau nws lub tuam txhab engineers thiab cov European Broadcasting Union. Lub kho version twb siv nyob rau hauv 1992, thiab ces tau nyiaj dhau los cov kev hloov nyob rau hauv 2002 thiab 2009.

Raws li ib txwm, muaj yog ib tug txawv nyob rau hauv lub interfaces. Nws yuav tsum tau txiav txim siv zoo-tsim cov qauv.

txawv

Yog hais tias koj tsis paub dab tsi txog cov S / PDIF, thiab nws yog dab tsi koj xav tau, tej zaum koj yeej tsis tau hnov txog thiab AES / EBU. Qhov tseeb txheem invented rau le ntawd thiab CD tawm tswv yim, uas yog encoded siv cov impulse-code tes taws los piav. Lub interface siv BMC code. Qhov no txhais tau tias cov kev hloov ntawm cov lus qhia muaj tshwm sim nrog ib yam exponent zauv zaus, thiab lub zaus rov qab cov ntaub ntawv kis tau los ntawm cov seev suab.

AES txheem tau sawv cev los ntawm peb cov kev hloov kho. Tag nrho cov ua hauj lwm nrog 110 ohms kuj index nrog ib yam kev twb kev txuas, nyob ntawm seb lub kev hloov kho siv Cable shielded khub los yog qeb 5. Nyob rau hauv cov ntaub ntawv no kuj sib txawv standard connectors, thawj XLR los yog D-25, RJ-45 tom qab. Lub teeb liab theem ntawm 2-7 V.

Tes taws los piav tseem unchanged thiab dhau los ntawm lub encoding. Subcode cov ntaub ntawv yog ASCII ID phau ntawv. Qhov siab tshaj plaws nyob deb li cas thaum xub thawj tsuas yog 100m tom qab - 400 m. Resolution txog 24 khoom.

Ua ntej peb yuav tag nrho cov kawm txog cov S / PDIF, thiab nws yog vim li cas koj xav tau, muaj ib nrab kev xaiv AES3id. Nws tau ua hauj lwm nrog 75 ohm, kev twb kev txuas tau kauj coaxial cable. Connector hom dua hloov mus rau BNC, thiab lub teeb liab theem tau tshem tawm mus rau 1 V. Qhov siab tshaj plaws nyob deb li cas tau mus txog ib tug taw tes 1000 m daws hwj chim tseem tib yam -. 24 khoom.

Qhov no interim version yog lom zem ntau dictated lub specification ntawm yam khoom tshiab. Piv txwv li, lub saib xyuas cov qauv tseem ua hauj lwm nrog 75 ohm, kauj kev twb kev txuas muaj. Coaxial cable yog ob qho tib si, thiab kho qhov muag, nyob ntawm seb lub hom. Connector dua hloov hom: RCA los yog TOSLINK. Teeb liab theem tau ua tsawg tshaj li ib nrab - 0.5 V. hloov subcode cov ntaub ntawv uas yog txawm peem rau nrog kev ruaj ntseg tshuab los ntawm SCMS daim ntawv. Maximum ntev tsis thiab los ua xwb 10 m, thiab 20 cov khoom los tsis ua cas muaj peev xwm pom tag nrho cov tib 24 khoom.

hom

Raws li peb hais ua ntej lawm, nws muaj peb hom txuj no. Muaj yog ib qho kev kho qhov muag S / PDIF, digital thiab coaxial. TOSLINK ua ntej tau txais nws lub npe ua tsaug rau Toshiba tsim tawm. Qhov no fiber-optic txheem. Nws yuav feem ntau yuav pom nyob rau hauv domestic suab pab kiag li lawm, computer suab ntawv, thiab thiaj li nyob. D. Ib tug nrov nyuam qhuav ua MiniTOSLINK daim ntawv ceeb 3,5 nkaus. Lawv muaj peev xwm yuav nrhiav tau nyob rau hauv ib co qauv ntawm cov laptops, uas nws S / PDIF raws li ib tug headset tso zis.

Coaxial hom muaj ib tug tsis kam ntawm 75 ohms, yog kev cob cog rua nrog RCA interface. Yog hais tias koj tsis haum cov pa suab cables, kuj hu ua tulips, ces saib nyob rau hauv lub coaxial txheem. Mus ua hauj lwm, nws yog haujlwm rau ob sab, thiab qhov kev kawm ntawm lub tswv yim thiab tso zis impedance ntawm 75 ohms.

Cov suab S / PDIF - ib tug peb lub hom Level (TTL). Cov txuj no yog raws li nyob rau hauv lub tswvyim ntawm kev tsim kho ntawm lub bipolar transistors thiab resistors. Transistor-transistor logic raws li nyob rau hauv ob ua sawv, tab sis yog tsis ib txwm. Tsev> 2.4 V, lub thib ob 0-0.4 V. Cov outputs ntawm no hom yuav muaj nyob rau suab phaib.

Muaj yog ib tug yooj yim piav qhia txog cov kev faib tawm, kom tsis txhob muaj kev ntxhov siab thiab kom zoo nrog lub fact tias nws yog - S / PDIF. Qhov no cov suab interface, raws li peb muaj sab, tej zaum yuav ua tau ib tug cov los kho qhov muag. Yog hais tias koj tau muab tso rau ib tug zoo lub tsev audio system los yog suab center, nws yog zoo dua mus cuag nws ntawm no lub connector hom. Lub suab zoo yog npaum li cas zoo dua ib tug txheej txheem hom ntawv.

Improvement vim lub fact tias lub suab kis los ntawm tus high-zaus filling thiab muab tag nrho cov "qias neeg" pulses tso zis los ntawm cov analog hom ntawv thiab digital, uas tsis ua suab nrov distorted. Yog hais tias koj siv ib tug optical txheem, koj yuav tsis nco qab txog lub suab nrov ntawm cov tsav.

daim ntawv thov

Overlooked standard thawj siv nyob rau hauv CD-players. Tom qab peb pom hais tias nws muaj peev xwm yuav siv tau raws li ib tug lub suab transmitter thiab ib tug connector nyob rau hauv lub suab ntaus ntawv. Yog li ntawd, qhov no interface yog tshwm nyob rau hauv lub MiniDisc-players thiab suab phaib rau lub PC. Ib txhia tej kev cai no tsav tsheb tau pom tus qauv nyob rau hauv lub tsheb suab. Tshwj xeeb tshaj yog nws tau ib tug godsend rau cov neeg uas yog nkees swb ntawm ib tug loj tus naj npawb ntawm cables. Tam sim no ib lub nras uas nyob ntawm tej yuav muab tau yooj yim hloov nrog ib tug fiber optic cable.

S / PDIF yuav pom raws li ib tug cov kwj transmitter. Feem ntau nyob rau hauv no hom ua hauj lwm nrog DVD-neeg uas ua ntawv cov tswv yim AV-tsev tsev ua yeeb receiver. Raws li ib tug tshwm sim, tag nrho cov tshiab lub suab technology los ua muaj nyob rau hauv lub tsev. Muaj ntau cov neeg siv yuav muaj peev xwm mus ntsib cov Dolby Digital thiab cov ua yeeb yam System (DTS).

Ntawm tag nrho cov kev xaiv, feem ntau connector los ua RCA. Nws yog ua khub nrog S / PDIF "nyob" nyob rau hauv neeg cov suab cov khoom txheem. Ib me ntsis ntawm ib tug optical hom yog siv tsawg zaus. Yuav kom siv lub suab system nrog active acoustic tsim nyog cia li mus tau ib tug tawm los ntawm S / PDIF.