Peev Xwm info DVD-ROM

Tej zaum tam sim no nws yog tsis yooj yim sua kom tau raws li ib tug txiv neej uas yuav tsis tuav ib tug CD. Tsis ntev los no, hauv xov xwm tiag surrendered lawv txoj haujlwm vim lub active kev taw qhia ntawm ntau technologically advanced drives raws li tau lub xeev nco. Cuaj kaum, tsis tau tag nrho tso tseg lub discs yog tsis yog advisable. DVD muaj peev xwm yog txaus los mus khaws cov feem ntau ntawm cov kev pab cuam thiab multimedia ntaub ntawv. Manufacturers qhia tau tias tus neeg siv yuav siv 4.7 GB. Nyob rau hauv qhov tseeb, rau qhov DVD tsav nyiaj pab ntau tshaj cov ntaub ntawv muaj peev xwm ntawm 4,38 GB, uas yuav tsum tau piav qhia los ntawm qhov sib txawv nyob rau hauv tus qauv ntawm lub xam. Niaj hnub no peb tham txog cov ntau yam Disc technology thiab nrog lub nuances ntawm xam qhov ntim ntawm xov xwm.

Qhov teeb meem nrog cov ntsiab lus txhais

Lub sij hawm DVD, kuj ceeb tias, tsis muaj ib tug unambiguous seev suab. Qhov no technology tau tsim los hloov pa CDs CD, lub peev xwm uas yog nce ua tsis txaus. Chiv DVD stands rau Digital Video Disc (Cov Video Disc). Txawm li cas los, tom qab ntawd nws tau los ua tseeb tias nws yog ua tau rau sau tsis tau tsuas yog movies, tab sis tseem muaj lwm cov ntaub ntawv. Qhov no yog vim li cas hais tias ib co tau pib muab ib co ntsiab lus rau lub sij hawm, lub ntsiab lus lub DVD Digital ntau yam (ntau yam) Disc. Zuag qhia tag nrho, ob qho tib si muaj tseeb decryption.

Los ua tus nqi ntawm cov muaj

Nws twb tau qhia hais tias DVD-discs tau hloov lub CD, uas yog tsis txaus muaj peev xwm. Yog xav nyeem kaw cov ntaub ntawv mus rau qhov chaw, nws yog tsim nyog mus thov ib tug nyias laser beam. Tus tsav apparatus rau no tej chav tsev yog siv, muaj raws ntawm radiating caij thiab lub tsom system. Lub ntsiab sib txawv ntawm lub teeb beam siv rau kev nyeem ntawv thiab sau ntawv cov ntaub ntawv, yog hais tias nws yog coherent, ces muaj yog ib tug heev narrowly teem. Qhov no pub zoo tshem tawm cov teebmeem ntawm diffraction phenomena thiab cuam ntawm lub teeb tsis. Nyob rau hauv kev tsim tus qauv CD muaj nyob rau ntawm lub sij hawm lub tej yam me me semiconductor emitters twb tsis tau los tsim ib tug txaus nqaim beam, li ntawd, lub dav ntawm lub lem rau ib tug disc hlau puag yog hais txog 1.6 microns. Tom qab, ntau sophisticated teeb-emitting diodes tau tsim, lub beam uas yog li ntawd nyias hais tias tus dav ntawm txoj kev khiav yog tau txo los ntawm ib nrab. Yog li, cov ntaub ntawv muaj peev xwm ntawm DVD-ROM yog ob peb lub sij hawm tshaj lub zoo xws li parameter CD. Tsis tas li ntawd txoj kev khiav dav, nws twb tau mus hloov qhov kev ncua deb therebetween, thiab qhov luaj li cas ntawm qho to.

"Ncuav mog qab zib" ntawm lub disks

Lub peev xwm ntawm ib tug DVD-ROM yog txiav txim los ntawm tsis tsuas yog tus saum toj no-hais qhov ntev thiab configuration ntawm cov laser beam. Tsim xws xov xwm, uas, nyob rau hauv qhov tseeb, ua ke ntau disks nyob rau hauv ib yam khoom, thaum tswj cov txheej txheem ntev. Tej multi-txheej cog lus yuav muab piv nrog ib tug nyuaj. Nyob rau hauv lub qhuav yog tsis siv xwb, tiam sis ob paths, tab sis txheej txheem yog li ntawd tus nyeem ntawv laser beam kis dawb do los ntawm cov translucent sab saum toj nto. Lawv ntim mus txog 8,54 GB. Qhov siab tshaj plaws muaj peev xwm ntawm cov DVD-disc, uas nws txoj kab uas hla tsis yog 12, thiab 8 cm, yog 5,32 GB. Structurally, tus tsav yuav muaj ob emitters, txhua tus uas tsom rua nws qhov tob (nto). Muaj cov qauv nrog ib tug hluas beam, uas tswj cov ntawm electronics. Cov ntaub ntawv DVD muaj peev xwm yuav ua tau txawm ntau dua thaum siv nyob rau hauv lub thiaj li hu ua ob-lub xeev tshuaj. Externally, nws yog ib tug tsis tu ncua CD, tab sis nyeem / sau tau los ntawm ob tog, uas nyob rau hauv feem ntau ntawm cov drives yuav tsum tau tig lub tsheb. DVD-muaj peev xwm disc xws kev hloov kho yog los ntawm 9.4 GB (tib txheej ob sab sib dho) rau 17.08 (plaub khaubncaws sab nraud povtseg, ntaubntawv povthawj siv rau ob sab). Txawm li cas los, cov "ncuav" yog tsis lug siv vim tus nqi siab ntau lawm thiab qhov yuav tsum tau rau ceev faj heev los kho lawv raws li cov slightest kos yuav ua tau kom lub cev tsis nyeem cov ntaub ntawv los ntawm qhov pib khaubncaws sab nraud povtseg.

ceev ntaub ntawv

Cov RAM raws li disc technology lus dag cua kub nto nrog ib tug laser beam. Lawv feature yog lub peev xwm ua lub formatting nyob rau hauv ib tug paub ntaub ntawv system ROG-32, thiab xaiv rho tawm cov ntaub ntawv. Structurally, cov discs yog muab tso rau hauv tshwj xeeb cartridges, uas tsub kom lawv muaj kev cia siab. Raws, Yog hais tias koj tshem tawm cov DVD-RAM ntawm lub cev, nws yuav ua hauj lwm nrog nws nyob rau hauv ib tug tsav xws li Multi. Qhov no yog ib tug ncaj txhim khu kev qha kev daws teeb meem. Cov ntaub ntawv muaj peev xwm DVD ntawm no hom yog los ntawm 1,46 GB (ib leeg-mog ib leeg-txheej, 8 cm) rau 9.4 GB (ob sab sib dho). Lub sij hawm RAM txhais tau tias rewriting yog lub cev tau. Lub acronym yuav muab txhais raws li "Random Access nco". Nyob rau hauv qhov tseeb, qhov no hom ntawm disc yog siv rau cov ntaub ntawv backup thiab ua ntej lub advent ntawm lwm xov xwm yog ib tug zoo tshuaj. Tshwj xeeb tshaj yog thaum khav ntev cia (txog 30 xyoo) thiab tus naj npawb ntawm overwrite mus (ntau tshaj 100 txhiab.). Disadvantage - kuj muaj nqi thiab tsis muaj kis.

lub Video

Cov nram qab no kev txiav txim siab - yog DVD-Video. Cov discs yog tsim los sau cov multimedia kwj. Xa mus rau li «DVD-1 ... 18". Tus thawj plaub - kev hloov kho yog txo nyob rau hauv txoj kab uas hla (8 cm tiv thaiv tus qauv 12). Xam tias yog classics DVD-5, los ntawm uas yuav tsum tau kev raws li 4.7 GB (ib leeg-mog). Raws li, qhov nyiaj pab ntau tshaj peev xwm ntawm cov DVD nyob rau hauv pawg no yog 17,08 GB (DVD-18, ob sab, plaub khaubncaws sab nraud povtseg). Txij li thaum lub loj heev video players siv yooj yim ntawm blocks kom txo tus nqi ntawm ntau lawm, tsis tag nrho cov qauv yog muaj peev xwm nyeem ib tug loj npaum li cas ntawm discs. Exception - ib txheej ob mog, rau cov uas tsuas yuav tau tig lub disc nyob rau hauv lub tsav. Lawv disadvantage yog cov tsis muaj qhov chaw rau ntawm daim ntawv lo, yog li lub npe yog qhia nyob rau hauv pob tshab ib feem, tom ntej no mus rau lub central qhov.

sau Thaum

Lub rov tshwm sim ntawm drives muaj peev xwm ntawm kev ua tau zoo rau cov ntaubntawv povthawj ntawm cov ntaub ntawv mus rau disc nyob rau hauv tsev, yuav ua rau ib tug tiag tiag kiv puag ncig nyob rau hauv lub teb ntawm backup thiab feem ntau tam sim no zaj duab xis tsev qiv ntawv. DVD + -R Ameslikas muag tsis muaj cov ntaub ntawv. Tus tswv ntawm ib tug tshwj xeeb tsav yuav txuag rau lub disc tej ntaub ntawv digitized. Xim daim iav-xiav zas mus rau lub violet cheeb tsam ntawm lub spectrum. Peev Xwm DVD ntawm no hom yog los ntawm 4.7 GB (tib txheej rau ntawm ib sab) rau 17,08 Gb. Lub volume nyob, raws li ib txwm, tus xov tooj ntawm khaubncaws sab nraud povtseg thiab cov lus qhia. Tseem, vim hais tias ntawm cov nqi kev cai feem ntau lug siv qhov nyuaj cog lus rau 4.7 GB. Yav tas los, cov ntaub ntawv yuav tau ua nrog cov kev pab los ntawm lub computer drives, tab sis tam sim no lub sij hawm no muaj ib tug ntau ntawm video players uas yuav khaws tseg rau ib tug TV kis tau tus mob drives. "-" Qhov teeb meem ntawm compatibility thiab «+» R rau ib ntev lub sij hawm nyob rau hauv lub yav dhau los thiab nyob rau hauv qhov tsab xov xwm tsis txhob sib tham txog.

ntau yam kev sau ntawv cia

yav dhau los hom disc khuam yog cuab kev - lawv yuav tsis rov cov ntaub ntawv, rho tawm hauv cov ntaub ntawv. Yuav kom daws tau qhov teeb meem no tau tau npaj yog fundamentally sib txawv discs, hu ua DVD + -RW. Lawv yuav siv tau yuav luag li ib qho kev disk drive. Lub sij hawm RW txhais tau tias rewritable, i.e. rewritable. Peev Xwm DVD ntawm no hauv chav kawm ntawv yog tib yam li hais tias ntawm "zoo tib yam» R. Txawm li cas los bilayer tsis tshua ncua vim hais tias ntawm qhov yuav tsum tau mus kis tau ib tug tshwj xeeb tsav, tau mus ua hauj lwm nrog xws li disks. Nyob rau hauv tas li ntawd, lub rewritable kev daws teeb meem thiab thiaj li yuav tsum tau ceev faj tuav rau nws, thiab complexity ntawm lawv tsim txhais tau tias cov discs yeej muaj los tshuab tawm plua tshauv hais. Ib tug random khawb rau ntawm qhov chaw yuav tsis muaj nyiaj yuav nyeem cov lus qhia los ntawm lub qis khaubncaws sab nraud povtseg. Yog li, lub "classic" - nws yog ib tug txheej ib leeg-mog disc. Lub nto xim mas nws txawv ntawm grey rau yuav luag dub. Cov nab npawb ntawm cov sau mus teb yog hais txog ib tug ob peb txhiab, tab sis nyob rau hauv kev xyaum xws li ib tug disc, koj muaj peev xwm sau txog li 50-100 lub sij hawm. Thiab ces lub sij hawm cia cia siab rau yog txo. Yog li ntawd, DVD-RW yog haum rau short-term cia thiab thauj. Ntaubntawv povthawj siv chav tsev yuav ua tau raws li ib txwm. Nyob rau tib lub sij hawm uas siv lub qhov rais mechanism kuj yuav ua hauj lwm zoo li ib tug qub tsav (nyeem / sau arbitrary ntaub ntawv). Txawm li cas los, vim rau qhov tseeb hais tias tus txheej txheem rewritable disc tsis pub kom tsim kev kub ceev, feem ntau yog muaj los khom rau plaub lub sij hawm, sib npaug zos rau 5.5 MB.

cov ntaubntawv povthawj siv feature

Tus txheem DVD muaj peev xwm tej zaum yuav ib nyuag zoo tshaj. Qhov no yog tiav los ntawm kev siv ntawm cov hlau lead tawm tsam. Overburn muaj nuj nqi yuav tsum tau kev txhawb los ntawm lub ntaus ntawv. Nws yuav qhib kom ua huaj nyob rau hauv ib tug nrov Nero software los mus rau "Options - Kws muaj txuj zog". Peb tsis pom zoo siv no feature tsis muaj huab tseem ceeb, vim nws yog ua tau rau lub ntsej muag lub cev tsis mus nyeem cov disc nyob rau hauv lub tsav, tsis ua hauj lwm nrog Overburn.

Raws li xam volume

Muaj ntau computer tswv tau ntev pom hais tias ib tug CD yuav tsis sau cov nqi ntawm cov ntaub ntawv, uas yog qhia los ntawm cov chaw tsim tshuaj paus. Nyob rau hauv qhov tseeb, tsis muaj kev coj tsis ncaj no. Cia li tsav manufacturers rau kev lag luam yog vim li cas ntseeg tau hais tias 1 kB 1000 bytes, tab sis nyob rau hauv qhov tseeb nyob rau hauv 1024 (txhim tsa ob nyob rau hauv lub thib kaum degree). Nrog lub nce nyob rau hauv lub xov tooj yog loj hlob nyob rau hauv kev vam meej. Yog li ntawd, ib tug txheej txheem DVD-ROM yog muab tso rau tsis muaj ntau tshaj "ncaj ncees" 4,38 GB.