Sony DCR-DVD200 DVD Handycam Technology Handbook - Page 8

DVD MEDIA TECHNOLOGY 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. 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. ●Record Layer of DVD-RW Groove Land Track pitch 0.74µm 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 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. 8 DVD Handycam TECHNOLOGY HANDBOOK