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DVD recordable
DVD recordable and DVD rewritable refer to part of optical disc recording technologies. DVD optical disc formats that can be recorded by a DVD recorder, (written, "burned"), either write once or rewritable (write multiple times) format written by laser, as compared to DVD-ROM, which is mass-produced by pressing, primarily for the distribution of home video. ''DVD recordable'' is a general term that refers to both write-once and rewritable formats, whereas ''DVD rewritable'' refers only to rewritable formats.
Like CD-Rs, DVD recordables use dyes. Depending on the intensity of the laser, the reflective property of the dye on a particular spot will determine whether it is a peak or a valley representation from pressed DVD. Dyes give the data side of a disc a distinct color. Dyes are also the reason playback is not guaranteed. Their reflective properties are not as good as with stamped DVDs that commonly have aluminum as the reflective layer.
Recordable DVDs are divided into three incompatible camps:
== DVD-R/DVD-RW (DVD "dash") ==
First DVD recordable format released in the market. Developed by Pioneer and backed by the DVD Forum. Has broader playback compatibility than the "+" especially with much older players. The dash format uses a "land pre-pit" method to provide 'sector' address information.
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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