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| Types and features of recordable DVD media |
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The need for higher-capacity recordable media have been dramatically
increasing to record BS digital broadcasting programs, edit images recorded with
digital video cameras, back up hard disk drives and store high-capacity contents.
Against the background as such, it is expected that a DVD (Digital Versatile Disc)
provides you with applications in a wider range of use and field thank to its
superior performance as well as its high capacity of 4.7GB (normal size on a single
side), which is about 7 times the capacity of a CD. Furthermore, the DVD may be
used with higher-performance and more multifunctional drives and recorders, and
united with hard disk drives, which will lead to the further expansion of the
DVD market.
Let us introduce the types and features of each format of DVD recordable media.
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| DVD-R (Write-once type) |
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Standardized by "DVD Forum" |
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One-time recording |
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Using organic dye material in the recording layer
makes it possible to play back the recorded data with a laser. |
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The media has 2 formats, "for General (consumer
use)" and "for Authoring (professional use)", using lasers in different wave-length
for recording. The copy-protected function is added to the former format. |
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| DVD-RW (Rewritable type) |
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Standardized by "DVD Forum" |
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Rewritable about 1,000 times |
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The phase change recording material is adopted.
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Using amorphous material in the recording layer
makes it possible to record and play back data with a laser. |
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| DVD+R (Write-once type) |
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Standardized by "DVD+RW Alliance" |
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One-time recording |
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Using organic dye material in the recording layer
makes it possible to play back the recorded data with a laser. |
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Provided with the lossless linking function capable
of recording data seamlessly |
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| DVD+RW (Rewritable type) |
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Standardized by "DVD+RW Alliance" |
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Rewritable about 1,000 times |
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The phase change recording material is adopted.
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Using amorphous material in the recording layer
makes it possible to record and play back data with a laser. |
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Provided with the lossless linking function capable
of recording data seamlessly |
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