Sony Handycam DCR-DVD100 Technology Handbook page 8

DVD MEDIA TECHNOLOGY
DVD-RW for Repeatable Recording
DVD-RW discs allow repeated recording, erasing, and
re-recording of data. Data is rewritable approximately
1,000 times. This capability makes DVD-RW widely used
in applications that require data editing and future
updating. The recording and playback process is
basically similar to the process of DVD-R recording.
DVD Handycam camcorders use both DVD-R and DVD-RW discs. Discs are 8cm (3-1/8") in diameter; they can be
single-sided with one recordable layer, or double-sided with one recordable layer per side.
Other DVD Formats
In addition to DVD-ROM, DVD-R and DVD-RW, the following DVD standards also are currently being marketed.
DVD-RAM
DVD+R
DVD+RW
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D V D H a n d y c a m T E C H N O L O G Y H A N D B O O K
Record Layer of DVD-RW
Track pitch
0.74µm
A rewritable media allowing up to 100,000 reliable rewriting operations. It cannot be played back on
standard DVD players; only players supporting DVD-RAM can be used.
A once-only recording media similar in capability to DVD-R.
A rewritable media similar in capability to DVD-RW.
In the case of DVD-RW, however, the chemical change
that takes place within the surface of the disc during
recording is reversible, allowing data to be erased and
re-recorded. DVD-RW recordings are also compatible
with most DVD players.
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