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data compression
Last modified: Thursday, January 22, 2004 

Storing data in a format that requires less space than usual.

Data compression is particularly useful in communications because it enables devices to transmit or store the same amount of data in fewer bits. There are a variety of data compression techniques, but only a few have been standardized. The CCITT has defined a standard data compression technique for transmitting faxes (Group 3 standard) and a compression standard for data communications through modems (CCITT V.42bis). In addition, there are file compression formats, such as ARC and ZIP.

Data compression is also widely used in backup utilities, spreadsheet applications, and database management systems. Certain types of data, such as bit-mapped graphics, can be compressed to a small fraction of their normal size.

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For internet.com pages about data compression . Also check out the following links!

Related Links

Optimizing Web Graphics 
Webreference.com article on how to minimize file size and dithering for Web graphics. Includes sections on the color palette, color reduction, compression, tools and techniques, and several online references.

Compression information page
Contains several archiver benchmark comparisons, archiver information and download links, and compression news.

Data Compression FAQ
Contains links to three FAQs about data compression.

PKWARE Home Page
Provides news and information about PKWARE Inc., and their popular data compression utility PKZIP.

The Audio and Video Compression Page
Good collection of links to technical MPEG and JPEG FAQs, as well as audio and video compression information and an introduction to wavelets.

Video over the Internet
Extensive paper on some of the problems, solutions and technologies, and products associated with streaming video on the Internet.

WinZip Home Page
Offers a collection of information for the WinZip archive utility for Windows including ordering information, download links, and support and FAQs.

Yahoo!'s archiving and compression utilities for UNIX page
Yahoo!'s directory of links to shareware, resources, and utilities for data archiving and compression for UNIX systems.

Yahoo!'s compression page
Yahoo!'s directory of compression software, utilities, and companies.

related categories

Data Compression

related terms

AAC

ARC

B-frame

CCITT

DCT

decoder

disk compression

DSP

Huffman compression

I-frame

JPEG

lossless compression

lossy compression

LZW

MNP

MP3

MPEG

MPEG-4

P-frame

ripper

wavelet

wavelet compression

ZIP


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