Difference between revisions of "DVD"
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A [[DVD]] or '''Digital Video Disc''' 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]] or '''Digital Video Disc''' 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 | + | 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 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. | ||
[[category:Technology]] | [[category:Technology]] | ||
Revision as of 02:17, July 6, 2010
A DVD or Digital Video Disc 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 standard sized writable DVD stores approximately 4,700MB (4.7GB) of uncompressed data.