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Definition of Compression

By , About.com Guide

Definition: Data can frequently be compressed by removing redundant sections (such as silences in music) or converting repeating sequences like ffffff into 6f, which reduces that text to 33% of its original size.

There are two types of compression:

  • Lossless - where the compressed data can be uncompressed to return an identical copy of the original.
  • Lossy - where some quality is lost to achieve greater compression but the loss is not noticeable.
Want to know more- read What is Data Compression?

Glossary:

A B C D E F G H I J K L M N O P Q R S T U V W X Y Z
Examples:
Data compression can be useful for bundling several files into one archive- making it easier to copy or email.
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