Ang FMUSER Wirless ay Naghahatid ng Video At Audio Nang Mas Madali!
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DVB T: Digital Video Broadcasting Terrestrial
Ang DVB-T ay isang pamantayan para sa MPEG-2 digital TV transmission gamit ang isang open-circuit terrestrial transmission medium. Dahil sa espesyal na kapaligiran ng paghahatid ng terrestrial TV, pagkatapos ng maraming taon ng pagsasaliksik at pagpapakita, ang mga dalubhasang nakikilahok sa samahang DVB ay pumili ng COFDM code division orthogonal frequency division multiplexing Ang ginamit na teknolohiya ng modulasyon ng channel, sinamahan ng isang malakas na code sa pagwawasto ng error, nakakamit ang balanse sa pagitan ng spectrum kahusayan sa paggamit at pagiging maaasahan ng paghahatid. Ang COFDM signal modulation at coding na teknolohiya ay nagbibigay ng 2 mga numero ng sub-carrier, mga mode ng 2K at 8K, 3 na mga pamamaraan ng pagbubuo, 4 na nagpapanatili ng mga agwat, at sinusuportahan ang maliit at malakihang solong mga frequency network upang patakbuhin ang SFN. Ang parehong digital TV program ay maaaring maipadala sa pamamagitan ng maraming mga mapagkukunan. Makatanggap ng parehong dalas ng tatanggap nang sabay-sabay upang mapabuti ang epekto ng pagtanggap. Maaaring suportahan ng system ang 8MHZ bandwidth ng kasalukuyang analog TV system, pati na rin ang 7MHZ at 6MHZ bandwidth. Upang maiwasan ang pagkagambala ng pagmuni-muni at makatanggap ng mga signal mula sa maraming mga transmiter ng parehong dalas, ipinakilala ang konsepto ng agwat ng guwardya: upang maiakma sa paghahatid sa iba't ibang mga kapaligiran, sinusuportahan ng system ang hierarchical modulate.
DVB-T, ito ay naglalayon sa terrestrial broadcasting. Pag-usapan natin ang tungkol sa kaugnay na teknolohiya nang mas detalyado:
FDM: dalas ng dibisyon ng maraming
OFDM: Orthogonal Frequency Division Multiplexing
COFDM: Coded orthogonal frequency division multiplexing, kabaligtaran mabilis Fourier transform (IFFT). Mahusay na epekto ng paglaganap ng anti-multipath at pagkagambala ng co-frequency, na angkop para sa terrestrial broadcasting at co-frequency network broadcasting.
QAM: Quadrature Amplitude Modulation: Ang quadrature amplitude modulation, mataas na kahusayan ng modulation, ay nangangailangan ng mataas na ratio ng signal-to-noise ng daanan ng paghahatid, na angkop para sa paghahatid ng cable telebisyon.
QPSK: Quadrature (Quaternary) Phase Shift Keying keying phase shift modulation, mataas na kahusayan sa modulation, nangangailangan ng mababang signal-to-noise ratio ng transmission path, na angkop para sa satellite broadcasting.
VSB: Vestigial sideband vestigial sideband.
Ang aming iba pang mga produkto:
Propesyonal na FM Radio Station Equipment Package
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Ipasok ang email upang makakuha ng sorpresa
es.fmuser.org
it.fmuser.org
fr.fmuser.org
de.fmuser.org
af.fmuser.org -> Afrikaans
sq.fmuser.org -> Albanian
ar.fmuser.org -> Arabe
hy.fmuser.org -> Armenian
az.fmuser.org -> Azerbaijani
eu.fmuser.org -> Basque
be.fmuser.org -> Belarusian
bg.fmuser.org -> Bulgarian
ca.fmuser.org -> Catalan
zh-CN.fmuser.org -> Intsik (Pinasimple)
zh-TW.fmuser.org -> Intsik (Tradisyunal)
hr.fmuser.org -> Croatian
cs.fmuser.org -> Czech
da.fmuser.org -> Danish
nl.fmuser.org -> Dutch
et.fmuser.org -> Estonian
tl.fmuser.org -> Pilipino
fi.fmuser.org -> Finnish
fr.fmuser.org -> Pranses
gl.fmuser.org -> Galician
ka.fmuser.org -> Georgian
de.fmuser.org -> Aleman
el.fmuser.org -> Greek
ht.fmuser.org -> Haitian Creole
iw.fmuser.org -> Hebrew
hi.fmuser.org -> Hindi
hu.fmuser.org -> Hungarian
is.fmuser.org -> Icelandic
id.fmuser.org -> Indonesian
ga.fmuser.org -> Irish
it.fmuser.org -> Italian
ja.fmuser.org -> Japanese
ko.fmuser.org -> Koreano
lv.fmuser.org -> Latvian
lt.fmuser.org -> Lithuanian
mk.fmuser.org -> Macedonian
ms.fmuser.org -> Malay
mt.fmuser.org -> Maltese
no.fmuser.org -> Norwegian
fa.fmuser.org -> Persian
pl.fmuser.org -> Polish
pt.fmuser.org -> Portuges
ro.fmuser.org -> Romanian
ru.fmuser.org -> Ruso
sr.fmuser.org -> Serbiano
sk.fmuser.org -> Slovak
sl.fmuser.org -> Slovenian
es.fmuser.org -> Espanyol
sw.fmuser.org -> Swahili
sv.fmuser.org -> Suweko
th.fmuser.org -> Thai
tr.fmuser.org -> Turkish
uk.fmuser.org -> Ukrainian
ur.fmuser.org -> Urdu
vi.fmuser.org -> Vietnamese
cy.fmuser.org -> Welsh
yi.fmuser.org -> Yiddish
Ang FMUSER Wirless ay Naghahatid ng Video At Audio Nang Mas Madali!
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