Compression

Compression may refer to: Compression is a reduction in the number of bits needed to represent data. Compressing data can save storage capacity, speed file transfer.Compression is often compared to data deduplication, but the two techniques operate differently. Deduplication is a type of compression that looks for redundant chunks of data across a storage system or a file system and replaces each duplicate chunk with a pointer to the original.

Physical science

• Compression (physics), the result of the subjection of a material to compressive stress
• Compression member, a class of structural elements, of which a column is the most common specific example
• Compressibility, a measure of volume change resulting from pressure
• Gas compression, raising the pressure and reducing the volume of gases
• Compression ratio, a figure of merit of an internal-combustion engine
• Compression (geology), a system of forces that tend to decrease the volume of rocks
• Compression strength or Compressive strength

Information science

• Data compression, the process of encoding digital information using fewer bits
• Audio compression (data), the compression of digital audio streams and files
• Bandwidth compression, a reduction in either the time to transmit or in the amount of bandwidth required to transmit
• Compression artifact, noticeable defects in audio or video that has been compressed
• Image compression, the application of data compression on digital images
• Video compression, the compression of digital video streams and files
• One-way compression function, a cryptographic primitive
• Dynamic range compression, a compression process that reduces the dynamic range of an audio signal

Medicine

• Brain compression, a potentially fatal condition where pressure is exerted on the brain by internal bleeding
• Compression bandage, a bandage that uses compression to reduce the flow of blood
• Compression in pyelography, pressing on the lower abdominal area in intravenous pyelogram
• Condensation (psychology) in Freudian psychology
• Cold compression therapy, to alleviate the pain of minor injuries

Other

• Gain compression, in electronic amplifiers, a reduction in differential or slope gain resulting from device non-linearity
• Compression (functional analysis), the restriction of an operator on a Hilbert space to a subspace, obtained by orthogonal projection
• Compression (phonetics), running syllables together in informal speech
• Compression (zoology), when an animal (or part of) is smaller compared with other animals in the same group, for example the Yellow jack

See also

• All pages with titles beginning with Compression
• All pages with titles containing Compression
• Compaction (disambiguation)
• Compress
• Compression garment
• Compressor (disambiguation)
• Decompression (disambiguation)
• Expansion (disambiguation)