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Old Aug 30, 2004, 11:24 PM
WillGtl48 WillGtl48 is offline
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Default DVD CD Specs

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[B]DVD[/B] stands for Digital Versatile/Video Disc, [B]DVDR[/B] stands for DVD Recordable and [B]DVDRW[/B] for DVD ReWriteable. If you're familiar with regular audio/music CDs or regular DVD-Video discs, then you will know what a recordable DVDR/W looks like. A recordable DVDR/W stores up to 2 hours of very good quality DVD-Video, including several audio tracks in formats like stereo, Dolby Digital or DTS and also advanced menu systems, subtitles and still pictures that can be played by many standalone DVD Players and most computer DVD-ROMs. If you choose to lower the video quality it is possible to store several hours video on a recordable DVDR/W using low bitrates and low resolution with video quality more like VHS, SVHS, SVCD, CVD or VCD. It is also possible to have up to 4.37* GB ordinary data or mix DVD-Video and data on a recordable DVD that can be played by most computer DVD-ROMs.

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


[B]DVD-R[/B] and [B]DVD-RW[/B]
DVD-R/W 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/W supports single side 4.37 computer GB* DVDs(called DVD-5) and double sided 8.75 computer GB* DVDs(called DVD-10).


[B]DVD+R[/B] and [B]DVD+RW[/B]
DVD+R/W has some "better" features than DVD-R/W such as lossless linking and both CAV and CLV writing.
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/W supports single side 4.37 computer GB* DVDs(called DVD-5) and double side 8.75 computer GB* DVDs(called DVD-10).


[B]DVD+R DL[/B]
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).


[B]DVD-RAM [/B]
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.

[B][U]Sizes[/U][/B]

[B]DVD-5[/B], holds around 4 700 000 000 bytes and that is 4.37 computer GB where 1 kbyte is 1024 bytes* . DVD+R/W and DVD-R/W supports this format. Also called Single Sided Single Layered. [B]This is the most common DVD Media, often called 4.7 GB Media. [/B]

[B]DVD-10[/B], holds around 9 400 000 000 bytes and that is 8.75 computer GB. DVD+R/W and DVD-R/W supports this format. Also called Double Sided Single Layered.

[B]DVD-9[/B], holds around 8 540 000 000 bytes and that is 7.95 computer GB. DVD+R supports this format. Also called Single Sided Dual Layered. [B]This media is called DVD+R9, DVD+R DL or 8.5 GB Media. [/B]

[B]DVD-18[/B], holds around 17 080 000 000 bytes and that is 15.9 computer GB. DVD+R supports this format. Also called Double Sided Dual Layered.

[B]DVD+R/W/DL and DVD-R/W exact sizes [/B]
DVD-R/W = 4 706 074 624 bytes ( 4488 MB )
DVD+R/W = 4 700 372 992 bytes ( 4482 MB )
DVD+R DL = 8 547 993 600 bytes ( 8152 MB )

[U][B]DVD Write & Read Speeds[/B][/U]

[B]DVD-+R/W write speeds (4.37 GB) [/B]
1x = around 60 minutes (1x read speed is 1.32MB/s(1 385 000 000 bytes/s) = ~57 minutes)
2x = around 30 minutes (2x read speed is 2.62MB/s = ~28 minutes)
2.4x = around 25 minutes (2.4x read speed is 3.17MB/s = ~24 minutes)
4x = around 15 minutes (4x read speed is 5.28MB/s = ~14 minutes)
6x = around 12 minutes (6x read speed is 7.93MB/s = ~9 minutes)
8x = around 10 minutes (8x read speed is 10.57MB/s = ~7 minutes)
12x = around 7 minutes (12x read speed is 15.85MB/s = ~5 minutes)
16x = around 5 minutes (16x read speed is 21.13MB/s = ~3.5 minutes)

[B]DVD-+R DL write speeds (7.95 GB) [/B]
1x = around 104 minutes (1x read speed is 1.32MB/s = ~103 minutes)
2.4x = around 44 minutes (2.4x read speed is 3.17MB/s = ~43 minutes)
4x = around 28 minutes (4x read speed is 5.28MB/s = ~26 minutes)
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