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Li nan erè komen yo konsidere CBR (Constant Bit To) kòm "se chak ankadreman resevwa lajan menm kantite Bits". Si li te ka a, Lè sa a, ki sa ki ta bi pou yo P oswa B ankadreman? Objektif antye nan P / B ankadreman se diminye kantite Bits pa referansye yon lòt ankadreman. Natirèlman, gen yon anpil nan sous CBR ak P oswa B ankadreman. Ou ka fasilman wè chak ankadreman gen anpil diferan kantite Bits menm nan yon kouran CBR.
Se konsa, ki sa ki CBR? Nan MPEG-2 ak H.264, CBR vle di kantite Bits manje dekodaj la konstan sou tan. Nan lòt mo, pousantaj transfè done dekodaj la konstan. Li pa gen anyen fè ak kantite Bits nan ankadreman endividyèl elèv yo.
Konfonn? Kouman li posib asiyen diferan kantite Bits ankadreman pandan y ap kenbe to a fèk ap rantre done konstan?
Repons: ou bezwen yon pezib. Pou konprann lojik la, konsidere yon priz dlo, yon tank dlo, ak yon seri de "nèg foto dekode" aliyen yo devan tank la.
Dlo a (kode MPEG-2 oswa H.264 kouran) se toujou ap koule tankou dlo nan tank la. Nèg yo aliyen yo devan tank la epi retire dlo a pou chak ankadreman yo dwe dekode. Retire a k ap pase nan entèval tan fiks nan pifò ka yo.
Menm si Mr.I, P, ak B yo retire diferan kantite dlo (= chak ankadreman bezwen diferan kantite Bits), vitès la priz dlo se konstan gras a tank la (pezib).
Nan MPEG-2, tanpon an rele tanpon VBV (Tanpon Videyo Tanpon Verifikatè). Nan H.264, tanpon an rele CPB (Kode Tanpon Foto).
Se nivo dlo a nan tank la nan sèten egzanp tan yo rele tanpon plenite ak dekri nan kantite Bits. Gwosè tank la rele gwosè tanpon VBV nan MPEG-2 ak gwosè tanpon CPB nan H.264.
Kouran kode a dwe konstwi pou tank la (= tanpon) pa janm debòde oswa debòde. Gen komèsyal / lojisyèl ki pa komèsyal yo rele "tanpon verifikatè" yo tcheke erè yo.
Lè gwosè a pezib mete nan gwo valè (li nan yon paramèt kouran kode), kodè a ka itilize gwo divèjans nan Bits pou chak ankadreman ki jeneralman rezilta nan pi bon kalite videyo. Sepandan, dekodaj la bezwen gen gwo pezib la, ki vle di pyès ki nan konpitè pi chè.
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es.fmuser.org
it.fmuser.org
fr.fmuser.org
de.fmuser.org
af.fmuser.org -> Afriken
sq.fmuser.org -> Albanyen
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
ja.fmuser.org -> Japonè
ko.fmuser.org -> Koreyen
lv.fmuser.org -> Latvian
lt.fmuser.org -> Lithuanian
mk.fmuser.org -> Masedwan
ms.fmuser.org -> Malay
mt.fmuser.org -> Maltese
no.fmuser.org -> Norwegian
fa.fmuser.org -> Pèsik
pl.fmuser.org -> Polonè
pt.fmuser.org -> Pòtigè
ro.fmuser.org -> Romanian
ru.fmuser.org -> Ris
sr.fmuser.org -> Sèb
sk.fmuser.org -> Slovak
sl.fmuser.org -> Slovenian
es.fmuser.org -> Panyòl
sw.fmuser.org -> Swahili
sv.fmuser.org -> Syèd
th.fmuser.org -> Thai
tr.fmuser.org -> Tik
uk.fmuser.org -> Ikrenyen
ur.fmuser.org -> Oudou
vi.fmuser.org -> Vietnamese
cy.fmuser.org -> Welsh
yi.fmuser.org -> Yiddish
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