A MegaByte is
equivalent to 8,388,608 Bits or
1,048,576 Bytes in
the basic form of digital information storage, being
composed of '0's or '1's in any combination.
On a CD or DVD the Bits are represented by 'pits' and 'grounds' (the normal flat
metallic surface of the disc without any holes burnt or punched out of it) with
a transition between a pit and ground being a 1 and a continuous spell within
a pit or a ground being a 0.
On a tape or hard
disc the same principle to a CD applies, but the
pits and grooves are represented magnetically.
As a rough guide,
you can fit 25,000 MegaBytes (or 25 GigaBytes) on
a single-layer Blu-ray disc, 50,000 MegaBytes (or
50 GigaBytes) on a dual-layer Blu-ray disc, 4,700
MegaBytes (or 4.7 GigaBytes) of information on a
full size (12cm) DVD and 700 MegaBytes (or 0.7
GigaBytes) of information on a standard (12cm) CD.
There are 8 Bits
in a Byte,
1024 Bytes in a Kilobyte (KB),
1024 KiloBytes in a MegaByte (MB),
1024 MegaBytes in a GigaByte (GB),
1024 GigaBytes in a TeraByte (TB),
1024 TeraBytes in a PetaByte,
1024 PetaBytes in an ExaByte,
1024 ExaBytes in a ZettaByte and
1024 ZettaBytes in a YottaByte.
View other CD
and DVD production FAQs.
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