Revolutionary Plastic - DVD
DVD, which once stood for Digital Video Disc or Digital Versatile Disc, is the next generation of optical disc storage technology that is expected to rapidly replace the CD-ROM disk (as well as the audio compact disc) over the next few years.
DVD as an industry standard was announced in November 1995 and backed by major players in the CE, IT and movie industry. The first players appeared in Japan in November, 1996,
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advantage over CD. To improve the resolution and readability of two distinct layers, the minimum pit length of a single layer DVD is 0.4 micro meters, as compared to 0.83 micro meters for a CD. In addition, the DVD track pitch is reduced to 0.74 micro meters, less than half of CDs 1.6 micro meters. With the number of pits equating to capacity levels, DVDs reduced track pitch and pit size creates four times as many pits as CDs.