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141

APPENDIX

B More About DVD

Philips and Sony deﬁned the ﬁrst CD format with the Red Book in 1980. Sixteen years later, a

new standard was launched, which promises to have an even more signiﬁcant impact—DVD.

DVD’s popularity is based primarily on its superior sound and picture quality, but also on its

ability to deliver a richer entertainment experience. New DVD-based technologies promise to

deliver previously unheard-of performance and value in areas such as interactivity, storage,

and more.

DVD in Detail

DVD technology is similar to CD technology, but uses a different recording method that

allows a disc to store considerably more material (up to 17 gigabytes [GB] per disc).

Comparison of DVD and CD

Specifications DVD CD

Diameter 120 mm 120 mm

Track distance 0.74 microns 1.6 microns

“Pit” length 0.4 microns .834 microns

Laser wavelength 635–650 nm 780–790 nm

Speed 3.49 m/s 1.2–1.4 m/s

Maximum data speed 11.08 Mbps 1.536 Mbps

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M-Audio StudioPro 4 Manuale Utente Pagina 141