lossless compression

lossless 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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  • lossless compression — /lɒsləs kəmˈprɛʃən/ (say losluhs kuhm preshuhn) noun Computers a data compression technique in which there is no reduction of the file data. Compare lossy compression …  

  • JPEG Lossless Compression — is a means of compressing images such that the original image can be recovered exactly so called Reversible Compression. It is only commonly used in conjunction with the DICOM standard for medical imaging.The name JPEG stands for Joint… …   Wikipedia

  • Lossless data compression — is a class of data compression algorithms that allows the exact original data to be reconstructed from the compressed data. The term lossless is in contrast to lossy data compression, which only allows an approximation of the original data to be… …   Wikipedia

  • 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… …   The Collaborative International Dictionary of English

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