Spadille's Blog

[From:http://www.videohelp.com/dvd]
DVD stands for Digital Versatile/Video Disc, DVDR stands for DVD Recordable and DVDRW for DVD ReWriteable.

There are three competing DVD Recording standards, DVD-R/DVD-RW and DVD+R/DVD+RW have pretty similiar features and are compatible with many standalone DVD Players and most DVD-ROMs while DVD-RAM has less DVD Player and DVD-ROM compatibility but better recording features.

DVD-R and DVD-RW
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DVD-R was the first DVD recording format released that was compatible with standalone DVD Players.
DVD-R is a non-rewriteable format and it is compatible with about 93% of all DVD Players and most DVD-ROMs.
DVD-RW is a rewriteable format and it is compatible with about 80% of all DVD Players and most DVD-ROMs.
DVD-R and DVD-RW supports single side 4.37 computer GB* DVDs(called DVD-5) and double sided 8.75 computer GB* DVDs(called DVD-10).
These formats are supported by DVDForum.

DVD+R and DVD+RW
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DVD+R is a non-rewritable format and it is compatible with about 89% of all DVD Players and most DVD-ROMs.
DVD+RW is a rewritable format and is compatible with about 79% of all DVD Players and most DVD-ROMs.
DVD+R and DVD+RW supports single side 4.37 computer GB* DVDs(called DVD-5) and double side 8.75 computer GB* DVDs(called DVD-10).
These formats are supported by the DVD+RW Alliance.

DVD+R DL
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DVD+R DL or called DVD+R9 is a Dual Layer writeable DVD+R. The dual layered discs can hold 7.95 computer GB* (called DVD-9) and dual layered double sides 15.9* computer GB (called dvd-18).

DVD-R DL
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DVD-R DL or called DVD-R9 is a Dual Layer writeable DVD-R. The dual layered discs can hold 7.95 computer GB* (called DVD-9) and dual layered double sides 15.9* computer GB (called dvd-18).

DVD-RAM
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DVD-RAM has the best recording features but it is not compatible with most DVD-ROM drives and DVD-Video players. Think more of it as a removable hard disk. DVD-RAM is usually used in some DVD Recorders. This format is supported by DVDForum.

Currently there are many writeable and rewriteable DVD formats on the market, and this can be confusing to the average consumer.
These DVD formats include: DVD-RAM DVD-R DVD-RW DVD+R DVD+RW DVD-RAM

+R和-R该选哪个? [From: http://computer.sz.net.cn/2004-09-17/nw2004091700091.shtml]
DVD-R／RW的缺点是刻录速度慢，因此市场上高速DVD-R／RW盘极少，大多都是4×的。DVD+R／RW是索尼、飞利浦以及惠普主推的刻录标准，DVD+R／RW克服了DVD-R／RW的一些缺点，它的寻址方式要优于DVD-R／RW，而且也比较容易提升速度，市场上8×和16×的DVD+R／RW也渐渐多起来了，不过DVD+R／RW盘片相对较贵；DVD-RAM是松下主推的DVD刻录标准，它采用与传统DVD不同的物理格式，技术方面很先进而兼容性差，目前只有松下和LG的DVD刻录机支持该标准。
上面我们已经简单说了DVD±R／RW的各自特点，对于普通用户而言，选择物美价廉的DVD-R比较合适，DVD-R光盘不仅能够保存普通数据资料，而且它和家用DVD机兼容较好，因此非常适合刻录DVD影碟、电子照片等多媒体资料；对于需要长时间数据保存的朋友来说，DVD+R是不错的选择，DVD+R光盘拥有更好的稳定性，和DVD刻录机的兼容性也不错，总体刻录质量要好于DVD-R。