Operation Manual

185
Appendix: Video and Data media
DVD size
DVDs look similar to CDs. The only visible difference is
on double-sided DVDs that have no label. Otherwise both
formats share the same dimensions.
– Diameter: 12 cm, like a normal CD (additionally there
are still DVDs with only 8 cm diameters.)
– Thickness: 1.2 mm, likewise like a normal CD.
DVD media (overview)
The DVD does not differ outwardly from a conventional
CD-ROM. Higher memory density (up to 17 gigabytes as
opposed to 650-780 megabytes) results from the fact that
information is stored more densely (double capacity) and
that up to four layers can be specified. In order to be able to
read the information, a special laser with modified wave-
length is necessary. Therefore DVDs cannot be read with
conventional CD-ROM drives.
Writable data carrier formats
The recordable DVD market is split for the time being into
three types: DVD-RAM, DVD +RW. and DVD-RW.
DVD-R: Once-only writable medium. The DVD-R can be
specified with the file structures of DVD Video, DVD Au-
dio or DVD-ROM.
DVD+RW: With +RW drives, re-recordable DVDs should
be created which can be read by almost any commercial
DVD-ROM or DVD player. The companies involved are
mainly Philips, Sony, HEWLETT PACKARD (as well as
Ricoh, Yamaha and Mitsubishi).
DVD-RW: Writable and erasable DVD technology that is
promoted by Pioneer and Sharp. This format was devel-
oped by the Pioneer company and should be compatible
with existing DVD players.
DVD-RAM: Due to the small storage capacity and incom-
patibility with DVD players, setting on this standard is not
recommended.
Note: MAGIX Movie Edit Pro 2004 supports DVD -R, DVD
+RW, and DVD -RW. Look at www.magix.com for patches!
Blank discs: Single-side recordable blanks with a capacity
of 4.7 Gbyte and a run-time of approx. 2 hours serve as
storage media for all DVD burning formats at present.