lossy compression

lossy compression
Compression Com*pres"sion, n. [L. compressio: cf. F. compression.] 1. The act of compressing, or state of being compressed. ``Compression of thought.'' --Johnson. [1913 Webster]

2. (Computers) reduction of the space required for storage (of binary data) by an algorithm which converts the data to a smaller number of bits while preserving the information content. The act of compressing [3].

Note: Compression may be {lossless compression}, in which all of the information in the original data is preserved, and the original data may be recovered in form identical to its original form; or {lossy compression}, in which some of the information in the original data is lost, and decompression results in a data form slightly different from the original. {Lossy compression} is used, for example, to compress audio or video recordings, and sometimes images, where the slight differences in the original data and the data recovered after {lossy compression} may be imperceptable to the human eye or ear. The {JPEG} format is produced by a {lossy compression} algorithm. [PJC]


The Collaborative International Dictionary of English. 2000.

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  • Lossy compression — Compression Com*pres sion, n. [L. compressio: cf. F. compression.] 1. The act of compressing, or state of being compressed. Compression of thought. Johnson. [1913 Webster] 2. (Computers) reduction of the space required for storage (of binary… …   The Collaborative International Dictionary of English

  • lossy compression — Compression Com*pres sion, n. [L. compressio: cf. F. compression.] 1. The act of compressing, or state of being compressed. Compression of thought. Johnson. [1913 Webster] 2. (Computers) reduction of the space required for storage (of binary… …   The Collaborative International Dictionary of English

  • lossy compression — Compression Com*pres sion, n. [L. compressio: cf. F. compression.] 1. The act of compressing, or state of being compressed. Compression of thought. Johnson. [1913 Webster] 2. (Computers) reduction of the space required for storage (of binary… …   The Collaborative International Dictionary of English

  • lossy compression — los sy com*pres sion, n. (Computers) The compression of binary data into a form which, when it is re expanded, has most, but not all, of the original information. It is used primarily for compression of images and sounds, and is designed to… …   The Collaborative International Dictionary of English

  • Lossy Compression — Lossy Compression,   Datenreduktion …   Universal-Lexikon

  • Lossy compression — A lossy compression method is one where compressing data and then decompressing it retrieves data that may well be different from the original, but is close enough to be useful in some way. Lossy compression is most commonly used to compress… …   Wikipedia

  • lossy compression —    Any data compression method that compresses a file by discarding any data that the compression mechanism decides is not needed. Original data is lost when the file is decompressed. Lossy compression methods may be used for shrinking audio or… …   Dictionary of networking

  • lossy compression —    A process that reduces the storage space needed for an image file. If a digital image that has undergone lossy compression is decompressed, it will differ from the image before it was compressed (though this difference may be difficult for the …   Glossary of Art Terms

  • lossy compression — nuostolingasis glaudinimas statusas T sritis informatika apibrėžtis Duomenų ↑glaudinimo būdas, kai juos suspaudžiant prarandama dalis informacijos. Iš taip suglaudintų duomenų nebegalima visiškai tiksliai atkurti pirminio jų pavidalo. Tačiau… …   Enciklopedinis kompiuterijos žodynas

  • lossy compression — compression of graphical data in which some of the information is lost and the quality of the picture is damaged although the compression is very efficient …   English contemporary dictionary

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