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Article: Compact Disc, DVD, and MP3 Technology
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Copyright informationCOPYRIGHT 2002 The Gale Group Inc. This material is published under license from the publisher through the Gale Group, Farmington Hills, Michigan. All inquiries regarding rights should be directed to the Gale Group. (Hide copyright information)
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Compact Disc, DVD, and MP3 Technology
Compact discs (CDs), MP3s, and Digital Versatile Discs (DVDs) are currently some of the most popular ways to enjoy music and movies. Utilizing the latest in
digital
technology they have each been able to improve on the standards set by their predecessors.
Compact Discs
A compact disc is a storage medium with digital data recorded on its surface. An optical beam reads the CD and reproduces the sound. Because the beam does not touch the CD, there is no wear and tear on the disc.
Compact discs store sound through a process known as Pulse Code Modulation (PCM). With this method, audio signals are sampled during short times intervals, and then ...
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