Difference between revisions of "DVD"
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| − | A | + | A '''DVD''' or '''Digital Video Disc''', since renamed '''Digital Versatile Disc''',<ref>[http://www.infoplease.com/ce6/sci/A0815510.html Digital Versatile Disc]</ref> is a circular shaped plastic disc used for playing video, and storing data. Data is read by reflecting a concentrated [[laser]] beam at a thin metallic layer within the disc. Fine holes or pits in the layer are picked up by the laser mechanism, and converted into data or video. |
| − | A DVD uses the same concepts as a [[CD-ROM]], but with higher speeds, and larger data storage, without increasing the physical disc size. | + | A DVD uses the same concepts as a [[CD-ROM]], but with higher speeds, and larger data storage, without increasing the physical disc size. The DVD format was designed to be backward compatible with the CD format. |
A standard sized writable DVD stores approximately 4,700MB (4.7GB) of uncompressed data. | A standard sized writable DVD stores approximately 4,700MB (4.7GB) of uncompressed data. | ||
| − | + | ==References== | |
| + | <references/> | ||
[[category:Technology]] | [[category:Technology]] | ||
Revision as of 16:16, February 16, 2012
A DVD or Digital Video Disc, since renamed Digital Versatile Disc,[1] is a circular shaped plastic disc used for playing video, and storing data. Data is read by reflecting a concentrated laser beam at a thin metallic layer within the disc. Fine holes or pits in the layer are picked up by the laser mechanism, and converted into data or video.
A DVD uses the same concepts as a CD-ROM, but with higher speeds, and larger data storage, without increasing the physical disc size. The DVD format was designed to be backward compatible with the CD format.
A standard sized writable DVD stores approximately 4,700MB (4.7GB) of uncompressed data.