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SPI gen yon total de 11 siyal itil, epi chak siyal différenciés an de siyal amelyore transmisyon anti-entèferans. Li transmèt pa DB25 sou lyen fizik la, kidonk koneksyon an anpil ak konplike, distans transmisyon a kout, epi li fasil pou echèk. Sepandan, SPI se yon siyal paralèl 11-ti jan ak pwosesis senp ak évolutivité fò. Se poutèt sa, pwodiksyon an nan jeneral MPEG2 kodè a videyo ak opinyon nan dekodaj la videyo yo tout estanda SPI koòdone siyal.
ASI itilize transmisyon seri, ki sèlman bezwen yon kab kowaksyal pou transmisyon, ki senp pou konekte e ki gen yon distans transmisyon long. Dapre avantaj respektif ak dezavantaj nan SPI ak ASI, SPI ak ASI interfaces yo souvan konvèti ant SPI ak ASI interfaces lè transmèt siyal yo.
1. SPI estrikti siyal
Paralèl transmisyon sistèm SPI gen ladan yon siyal revèy, yon siyal done 8-ti jan, yon siyal senkronizasyon ankadreman ak yon siyal done valab. Siyal la senkronizasyon ankadreman koresponn ak octet la senkronizasyon 047H nan pake a TS, ak done a siyal valab yo itilize yo fè distenksyon ant longè nan pake a TS kòm 188 bytes oswa 204 bytes. Lè pake TS a se 188 bytes long, siyal valab done a toujou wo, epi tout siyal yo senkronize ak siyal revèy la.
2. ASI koòdone
Kouran transpò ASI ka gen diferan pousantaj done, men pousantaj transmisyon an konstan, 270Mbps, kidonk ASI ka voye epi resevwa done MPEG2 nan diferan pousantaj. Sistèm transmisyon ASI a se yon estrikti kouch. Kouch ki pi wo a ak kouch nan dezyèm itilize estanda a MPEG2 ISO / IEC 13818-1 (SISTÈM), ak kouch yo 0th ak 1st yo se FC chanèl fib ki baze sou 1SO / IEC CD 14165-1. FC sipòte yon varyete medya transmisyon fizik, tankou transmisyon kab kowaksyal.
Premyèman, konvèti codebord 8Bit nan pake transpò MPEG2 ak senkronizasyon pake nan codebord 10bit; Lè sa a, nan konvèsyon paralèl / seri, lè yon nouvo mo oblije antre, ak sous done a poko pare, yo ta dwe mete yon senkronizasyon K28.5 Pawòl, yo nan lòd yo rive jwenn fiks pousantaj transmisyon 270Mbps ASI la. Kouran ki kapab lakòz seri a pral voye nan konektè kab kowaksyal la nan tanpon / sikwi kondwi a ak rezo kouple. Lè li rive nan fen k ap resevwa nan kab kowaksyal la, lè li ap resevwa done, li dwe premye pase nan konektè a ak rezo kouple, makonnen ak kous la ki retabli revèy la ak done, ak Lè sa a, fè konvèsyon seri / paralèl; yo nan lòd yo retabli senkronizasyon byte, dekodaj la ASI dwe Mo a senkronizasyon K28.5 fouye premye, yon fwa yo fin fouye mo a senkronizasyon, se fwontyè a delimite pou done yo imedyatman resevwa, kidonk etabli aranjman an byte kòrèk la nan byte yo pwodiksyon dekodaj; finalman, konvèsyon an 10 / 8bit fèt retabli pake Synchrone MPEG2 TS done yo kouran kòd. Men, mo senkronizasyon K28.5 la pa done valab, kidonk li dwe efase pandan dekodaj.
lòt pwodwi nou an:
Pwofesyonèl pakè ekipman estasyon radyo FM
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es.fmuser.org
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de.fmuser.org
af.fmuser.org -> Afriken
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ar.fmuser.org -> Arab
hy.fmuser.org -> Armenian
az.fmuser.org -> Azerbaydjan
eu.fmuser.org -> Basque
be.fmuser.org -> Belarisyen
bg.fmuser.org -> Bulgarian
ca.fmuser.org -> Katalan
zh-CN.fmuser.org -> Chinwa (senplifye)
zh-TW.fmuser.org -> Chinwa (Tradisyonèl)
hr.fmuser.org -> Kwoasyen
cs.fmuser.org -> Czech
da.fmuser.org -> Danwa
nl.fmuser.org -> Olandè
et.fmuser.org -> Estonyen
tl.fmuser.org -> Filipino
fi.fmuser.org -> Finnish
fr.fmuser.org -> Franse
gl.fmuser.org -> Galisyen
ka.fmuser.org -> Georgian
de.fmuser.org -> Alman
el.fmuser.org -> Greek
ht.fmuser.org -> Kreyòl ayisyen
iw.fmuser.org -> ebre
hi.fmuser.org -> Hindi
hu.fmuser.org -> Hungarian
is.fmuser.org -> Icelandic
id.fmuser.org -> Endonezyen
ga.fmuser.org -> Ilandè
it.fmuser.org -> Italyen
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mk.fmuser.org -> Masedwan
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no.fmuser.org -> Norwegian
fa.fmuser.org -> Pèsik
pl.fmuser.org -> Polonè
pt.fmuser.org -> Pòtigè
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