Sony DCR-DVD200 - Dvd Handycam Camcorder Manuale di tecnologia - Pagina 6
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DVD MEDIA TECHNOLOGY
Although a 12cm (4-3/4") DVD is the same size as a standard CD, its high-density format allows
more than 7 times more data to be recorded on a single disc.
The Basic Structure of a DVD
DVD consists of a dual-layered disc 12cm (4-3/4") or 8cm (3-1/8") in diameter. Each layer has a thickness of 0.6mm
(1/32").
Various kinds of DVD suit the needs of various applications, such as DVD-ROM (for playback only), DVD-R (for one-
time recording), and DVD-RW (for rewritable recording).
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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
Structure of DVD-ROM
Protection Layer
Record Layer
Base