DVD
DVD |
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instantia de: physical media format[*], audio release format[*] |
subclasse de: optical disc[*], machine-readable medium[*] |
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precedite per: VHS, disco compacte, LaserDisc[*] , succedite per: Blu-ray Disc[*] |
Commons: DVD |
DVD (cognoscite como "Disco Video Digital") es un disco optic de formato de medios. Su usos principal es le video e le dato. Multe DVDs es del dimensiones equal al discos compacte (CDs) sed pote immagazinar 4.7 gigabytes o 8.5 gigabytes comparate a 800 megabytes (le capacitate del CD).
Variationes del nomine DVD describe le modo como le dato es immagazinate super le discos: le DVD-ROM ha datos qui pote leger se sed non pote scriber se, DVD-R e DVD+R permitte de scriber le datos un vice. DVD-RW, DVD+RW e DVD-RAM permitte de registrar le datos multe vices. Le longitude de unda usate per le laser standard del DVD es 650 nm[1], e le unda ha un color rubie.
Historia
[modificar | modificar fonte]In 1993, duo formatos de discos optic ha disveloppate; un esseva le MultiMedia Compacte Disco de Philips e Sony, e le altere esseva le Super Densitate Disco, de Toshiba, Time Warner, Matsushita Electric, Hitachi, Mitsubishi Electric, Pioneer, Thomson, e JVC.
Un gruppo de expertos in computator nominate le Gruppo Technical de Laboro (qui ha includite representantes de Microsoft, Sun, Dell, e multe alteres) ha votate a boycotar le duo formatos pro determinar illos a converger in un standard commun qui es nascite con le nomine DVD.[2][3]
Capacitate de DVD
[modificar | modificar fonte]Designation | Partes | Layers (total) |
Diametro | Capacitate | ||
---|---|---|---|---|---|---|
(cm) | (GB) | (GiB) | ||||
DVD-1[6] | SS SL | 1 | 1 | 8 | 1.46 | 1.36 |
DVD-2 | SS DL | 1 | 2 | 8 | 2.66 | 2.47 |
DVD-3 | DS SL | 2 | 2 | 8 | 2.92 | 2.72 |
DVD-4 | DS DL | 2 | 4 | 8 | 5.32 | 4.95 |
DVD-5 | SS SL | 1 | 1 | 12 | 4.70 | 4.37 |
DVD-9 | SS DL | 1 | 2 | 12 | 8.54 | 7.95 |
DVD-10 | DS SL | 2 | 2 | 12 | 9.40 | 8.74 |
DVD-14[7] | DS DL/SL | 2 | 3 | 12 | 13.24 | 12.32 |
DVD-18 | DS DL | 2 | 4 | 12 | 17.08 | 15.90 |
DVD-R 2.0 | SS SL | 1 | 1 | 12 | 4.70 | 4.37 |
DVD-R 2.0 | DS SL | 2 | 2 | 12 | 9.40 | 8.75 |
DVD-RW 2.0 | SS SL | 1 | 1 | 12 | 4.70 | 4.37 |
DVD-RW 2.0 | DS SL | 2 | 2 | 12 | 9.40 | 8.75 |
DVD+R 2.0 | SS SL | 1 | 1 | 12 | 4.70 | 4.37 |
DVD+R 2.0 | DS SL | 2 | 2 | 12 | 9.40 | 8.75 |
DVD+RW 2.0 | SS SL | 1 | 1 | 12 | 4.70 | 4.37 |
DVD+RW 2.0 | DS SL | 2 | 2 | 12 | 9.40 | 8.75 |
DVD-RAM 2.0 | SS SL | 1 | 1 | 12 | 4.70 | 4.37 |
DVD-RAM 2.0 | DS SL | 2 | 2 | 12 | 9.40 | 8.75* |
DVD-RAM 2.0 | SS SL | 1 | 1 | 8 | 1.46 | 1.36* |
DVD-RAM 2.0 | DS SL | 2 | 2 | 8 | 2.65 | 2.47* |
CD-ROM | SS SL, 74 min | 1 | 1 | 12 | 0.682 | 0.635 |
CD-ROM | SS SL, 80 min | 1 | 1 | 12 | 0.737 | 0.687 |
CD-ROM | SS SL | 1 | 1 | 8 | 0.194 | 0.180 |
Un picolo differentia de formatos ‘+’ e ‘-’:
Type | Sectors | Bytes | GB | GiB |
---|---|---|---|---|
DVD−R SL | 2,298,496 | 4,707,319,808 | 4.71 | 4.384 |
DVD+R SL | 2,295,104 | 4,700,372,992 | 4.70 | 4.378 |
DVD−R DL | 4,171,712 | 8,543,666,176 | 8.54 | 7.957 |
DVD+R DL | 4,173,824 | 8,547,991,552 | 8.55 | 7.961 |
Technology
[modificar | modificar fonte]Le DVD usa un laser con longitude de unda de 650 nm (le CD usa 780 nm e le Blu-ray Disc usa 405 nm).
Lege plus
[modificar | modificar fonte]- Bennett, Hugh (April 2004). Understanding Recordable & Rewritable DVD. Optical Storage Technology Association. Recuperate le 2006-12-17.
- Labarge, Ralph. DVD Authoring and Production. Gilroy, Calif.: CMP Books, 2001. ISBN 1-57820-082-2.
- Taylor, Jim. DVD Demystified, 2nd edition. New York: McGraw-Hill Professional, 2000. ISBN 0-07-135026-8.
Ligamines externe
[modificar | modificar fonte]- DVD Copy Control Association and the Content Scramble System (CSS)
- Dual Layer Explained – Informational Guide to the Dual Layer Recording Process
- DVD Frequently Asked Questions (and Answers)
- DVDs: in the fast lane
- History of DVD technology Archived 2008-11-05 at the Wayback Machine from the Consumer Electronics Association
- How Stuff Works - DVD
Referentias
[modificar | modificar fonte]- ↑ Build Your Skills: A comparison between DVD and CD-ROM. Archivo del original create le 2012-07-11. Recuperate le 2008-11-10.
- ↑ E-commerce and Video Distribution:DVD and Blu-ray.
- ↑ Patrono:Cite press release
- ↑ Physical parameters. Archivo del original create le 2012-02-19. Recuperate le 2008-11-10.
- ↑ DVD in Detail. Archivo del original create le 2003-12-02. Recuperate le 2003-12-02.
- ↑ Dvd Faq
- ↑ DVD-14. AfterDawn Ltd.. Recuperate le 2007-02-06.