What is DVD? |
DVD stands for Digital Versatile/Video Disc, DVDR
stands for DVD Recordable and DVDRW for
DVD ReWriteable. If you're familiar with regular audio/music
CDs or regular DVD-Video discs, then you will know what a
recordable DVD looks like. A recordable DVD 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
DVD 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, 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.
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DVD-R and DVD-RW
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).
DVD+R and DVD+RW
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).
DVD+R DL
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
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
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.
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DVD Sizes: |
The DVD sizes can be a bit confusing. There are basicly 4 different DVD Sizes,
DVD-5, holds around 4 700 000 000 bytes and that is 4.37 computer GB where 1 kbyte is 1024 bytes* . DVD+R/DVD+RW and DVD-R/DVD-RW supports this format. Also called Single Sided Single Layered. This is the most common DVD Media, often called 4.7 GB Media.
DVD-10, holds around 9 400 000 000 bytes and that is 8.75 computer GB. DVD+R/DVD+RW and DVD-R/DVD-RW supports this format. Also called Double Sided Single Layered.
DVD-9, 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. This media is called DVD-R9, DVD-R DL, DVD+R9, DVD+R DL or 8.5 GB Media.
DVD-18, 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.
* In the computer world is 1 KB data = 1024 bytes so 4 700 000 000 bytes / 1024 = 4 589 843KB / 1024 = 4482MB / 1024 = 4.37GB.
DVD+R/DVD+RW/DVD+R DL and DVD-R/DVD-RW exact sizes
DVD-R/DVD-RW = 4 706 074 624 bytes ( 4488 MB )
DVD+R/DVD+RW = 4 700 372 992 bytes ( 4482 MB )
DVD+R DL = 8 547 993 600 bytes ( 8152 MB )
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DVD Write and read speeds: |
Single Layer(4.7GB) write speeds
1x (CLV) = about 58 minutes
2x (CLV) = about 29 minutes
2.4x (CLV) = about 24 minutes
4x (CLV) = about 14.5 minutes
6x (CLV/ZCLV) = about 10-12 minutes
8x (PCAV/ZCLV) = about 8-10 minutes
12x (PCAV/ZCLV) = about 6.5-7.5 minutes
16x (CAV/ZCLV) = about 6-7 minutes
Dual/Double Layer(8.5GB) write speeds
1x CLV = about 105 minutes
2.4x CLV = about 44 minutes
4x CLV = about 27 minutes
Single Layer (4.7GB) read speeds
1x read speed is 1.321MB/s = ~56 minutes
6x CAV (avg. ~4x) read speed is max 7.93MB/s = ~14 minutes
8x CAV (avg. ~6x) read speed is max 10.57MB/s = ~10 minutes
12x CAV (avg. ~8x) read speed is max 15.85MB/s = ~7 minutes
16x CAV (avg. ~12x) read speed is max 21.13MB/s = ~5 minutes
* write speed time and read speed time is not the same because writing requires some extra steps and also does the faster writing above 6x usually use lower write speeds for some parts of the dvd. 4x DVD speed = 36x CD speed. |
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Other non-standard special DVD formats: |
DVD-VCD
is basicly a VCD authored on a DVD. DVD supports the VCD resolution but the audio has to be resampled to 48 khz. If the audio is resampled to 48 khz it is standard DVD-Video.
DVD-SVCD
is basicly a SVCD authored on a DVD. DVD do not supports the SVCD resolution but it may anyway work and the audio has to be resampled to 48 khz like the DVD-VCD.
DVD-MP3
is MP3s burned on a DVD but very few MP3 capable standalone DVD Players supports it because most Players verify DVD as DVD-Video only.
DVD-ISO
is MPEG ,MPG, VOB files burned on a DVD without any DVD Authoring(making the vob,ifo files) but very few standalone DVD Players supports it because most Players verify DVD as DVD-Video only.
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DVD Ripper Wizard key features:
- Convert DVD to almost all popular video formats
- Rip CSS protected DVD movies
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DVD Ripper Wizard main functions:
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