CDs/DVDs works on the optical disc storage technology. CD stands for the Compact Disc and DVD stands for Digital Versatile Disc. A DVD/CD is composed of several layers of plastics and each layer is created by injection molding polycarbonate plastic.Data is encoded in the form of small pits and bumps in the track of disc.The encoding is done by a sharp laser beam.While reading the laser beam detects the pits and bumps and the combination of these gives a stream of bits which can be interpreted as characters by the computer.
Physical Formats:
DVD-ROM,CD-ROM
DVD-R, CD-R
DVD-RAM or DVD+RW, CD+RW
Logical Formats:
DVD-Video
DVD-Audio
Audio CD
Video CD
MP3 CD
Super Video CD
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