DVR & History of its Growth across the Globe
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DVD-R in simple common man understandable language is understood as a DVD recordable format. A DVD-R characteristically has a storage capacity of 4.71 GB. Both values are significantly larger than the storage capacity of its optical predecessor, the 700 MB CD-R – a DVD-R has 6.4 times the capacity of a CD-R. Pioneer has also developed an 8.54 GB dual layer version, DVD-R DL, which appeared on the market in 2005.
Data on a DVD-R cannot be changed, whereas a DVD-RW (DVD-rewritable) can be rewritten multiple (1000+) times. DVD-R (W) is one of three competing industry standard DVD recordable formats; the others are DVD+R (W) and DVD-RAM.
In present day technology savvy world there are three competing DVD Recording standards available in the market across the globe, DVD-R/DVD-RW and DVD+R/DVD+RW shares quite similar features and are compatible among standalone DVD Players and most DVD-ROMs while DVD-RAM has less DVD Player and DVD-ROM compatibility but better recording features.
All about DVD-R:
As far as DVD-R discs composition is concerned, they are composed two 0.6 mm polycarbonate discs, joined with an adhesive to each other. One contains the laser guiding groove and is coated with the recording dye and a silver alloy or gold reflector. The other one is an un-grooved "model" disc to assure mechanical stability of the sandwich structure, and compatibility with the compact disc standard geometry which requires a total disc thickness of about 1.2 mm.
The core designed and developed structure of Watershield DVD also help to protect the data containing layer from scratches by a thick "model" disk, a problem with CDs, which lack that structure. Double-sided discs have two grooved, recordable disc sides, and require the user to flip the disc to access the other side. In comparison to CD's 1.2 mm of polycarbonate, a DVD's laser beam is suppose to penetrate 0.6 mm of plastic in order to reach the dye recording layer, which is designed and developed to allow the lens to focus the beam to a smaller spot size to write smaller pits.
When we analyze a DVD-R, the addressing is generally done with additional pits and lands (called land pre-pits) in the areas between the grooves. The groove on a DVD-R disc has a constant wobble frequency used for motor control etc. Very much sure information shared about DVDR in above lines going to update your core knowledge base about the concept understood as DVDR in varied facets.
DVDR in present day fast moving world become a basic data management and sharing medium across the globe. DVD-R allows its user to carry huge data anywhere in the world. |
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Author Resource:-
After graduating in electronics seven years ago, Nathan decided to get into the field of electronics. His expertise and knowledge of the latest electronic goods have made him a trusted and reliable name among people as far as seeking expert opinion before buying products such as DVD-R and Watershield DVD etc. is concerned.
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By :
Nathan Davies
Submitted
2009-12-16 08:32:10 |
Article From Article Mayhem
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