DVD (
"digital versatile disc" or "digital video disc" is a
digital optical disc storage format invented and developed by Philips, Sony,
Toshiba, and Panasonic in 1995. The medium can store any kind of digital data
and is widely used for software and other computer files as well as video
programs watched using DVD players. DVDs offer higher storage capacity than
compact discs while having the same dimensions.
Pre-recorded
DVDs are mass-produced using molding machines that physically stamp data onto
the DVD. Such discs are a form of DVD-ROMs, because data can only be read and
not written or erased. Blank recordable DVD discs (DVD-R and DVD+R) can be
recorded once using a DVD recorder and then function as a DVD-ROM. Rewritable
DVDs (DVD-RW, DVD+RW, and DVD-RAM) can be recorded and erased many times.
DVDs are
used in DVD-Video consumer digital video format and in DVD-Audio consumer
digital audio format as well as for authoring DVD discs written in a special
AVCHD format to hold high definition material (often in conjunction with AVCHD
format camcorders). DVDs containing other types of information may be referred
to as DVD data discs.
In the early
'90s when the first CD-R disc was introduced manufacturers said the media had a
data life in excess of 40 years. In the late 90s when the first DVDR discs
appeared on the scene producers proclaimed a data life of at least 100 years.
Throughout that time and even today the press will "discover" that
the media is susceptible to CD or DVD rot that will eat your information -
audio, video or data - in as little as two years after it is written.
Because CD
and DVD media - in 2003 more than 7,150 million CD-R discs and more than 400
million DVDR discs were made and sold -- is used to archive nearly everything
today it does make you worry. Especially when these discs are the only place
you have precious, irreplaceable family memories - photos and movies - as well
as vital family, personal and company data/documents.
So where
does the truth lie? Somewhere across the complete spectrum.
Most people
who burn a disc without producing a coaster believe they have quality media.
Unfortunately that only tells you the disc will be compatible (able to be
played) in the vast majority of CD or DVD players. More importantly all better
quality CD and DVD burners include technology called overburn/underburn
protection making coaster production a thing of the past. The basic
construction of the two technologies enable you to burn your data in a very
precise, very controlled manner. So if you are looking to buy CD and DVDs of
your favourite movies and music visit Allindiayellowpage.com to get detail information about CDs and DVDs available
stores in your city and nearest areas.