Compression may refer to:

Physical science

Compression (physics) In mechanics, compression is the application of balanced inward ("pushing") forces to different points on a material or Structural system, structure, that is, forces with no Net force, net sum or torque directed so as to reduce its size in one ...

, size reduction due to forces *

Compression member A compression member is a structural element that primarily resists forces, which act to shorten or compress the member along its length. Commonly found in engineering and architectural structures, such as columns, struts, and braces, compressio ...

, a structural element such as a column *

Compressibility In thermodynamics and fluid mechanics, the compressibility (also known as the coefficient of compressibility or, if the temperature is held constant, the isothermal compressibility) is a measure of the instantaneous relative volume change of a f ...

, susceptibility to compression *

Gas compression A compressor is a mechanical device that increases the pressure of a gas by reducing its volume. An air compressor is a specific type of gas compressor. Many compressors can be staged, that is, the gas is compressed several times in steps or ...

Compression ratio The compression ratio is the ratio between the maximum and minimum volume during the compression stage of the power cycle in a piston or Wankel engine. A fundamental specification for such engines, it can be measured in two different ways. Th ...

, of a combustion engine *

Compression (geology) In geology Geology (). is a branch of natural science concerned with the Earth and other astronomical objects, the rocks of which they are composed, and the processes by which they change over time. Modern geology significantly overlaps all ...

*Compression or

compressive strength In mechanics, compressive strength (or compression strength) is the capacity of a material or Structural system, structure to withstand Structural load, loads tending to reduce size (Compression (physics), compression). It is opposed to ''tensil ...

Information science

Bandwidth compression In telecommunications, the term bandwidth compression has the following meanings: *The reduction of the Bandwidth (computing), bandwidth needed to transmit a given amount of data in a given time. *The reduction of the time needed to transmit a g ...

, reducing effort in data transmission *

Data compression In information theory, data compression, source coding, or bit-rate reduction is the process of encoding information using fewer bits than the original representation. Any particular compression is either lossy or lossless. Lossless compressi ...

, reducing the data required for information **

Audio compression (data) In information theory, data compression, source coding, or bit-rate reduction is the process of encoding information using fewer bits than the original representation. Any particular compression is either lossy or lossless. Lossless compression ...

, reducing the data required for audio **

Compression artifact A compression artifact (or artefact) is a noticeable distortion of media (including Image, images, Sound recording, audio, and video) caused by the application of lossy compression. Lossy data compression involves discarding some of the medi ...

, defect in data due to compression **

Image compression Image compression is a type of data compression applied to digital images, to reduce their cost for computer data storage, storage or data transmission, transmission. Algorithms may take advantage of visual perception and the statistical properti ...

, of digital images **

Video compression In information theory, data compression, source coding, or bit-rate reduction is the process of encoding information using fewer bits than the original representation. Any particular compression is either lossy or lossless. Lossless compression ...

One-way compression function In cryptography, a one-way compression function is a function that transforms two fixed-length inputs into a fixed-length output.Handbook of Applied Cryptography by Alfred J. Menezes, Paul C. van Oorschot, Scott A. Vanstone. Fifth Printing (August ...

, a cryptographic primitive

Medicine

* Brain compression, a medical condition *

Compression bandage A bandage is a piece of material used either to support a medical device such as a dressing or splint, or on its own to provide support for the movement of a part of the body. When used with a dressing, the dressing is applied directly on ...

*Pressing on the lower abdominal area in an

intravenous pyelogram Pyelogram (or pyelography or urography) is a form of imaging of the renal pelvis and ureter. Types include: * Intravenous pyelogram – In which a contrast solution is introduced through a vein into the circulatory system. * Retrograde pyelogram ...

Cold compression therapy Cold compression therapy, also known as hilotherapy, combines two of the principles of rest, ice, compression, elevation to reduce pain and swelling from a sports or activity injury to soft tissues and is recommended by orthopedic surgeons foll ...

, for minor injuries

Other

*Amplifier

gain compression Gain compression is a reduction in ''differential'' or ''slope'' gain caused by nonlinearity of the transfer function of an amplifying device for large-signal inputs. Overview When overdriving an amplifier beyond its the linear range, gai ...

, due to nonlinearity *

Compression (dance) This is a list of dance terms that are not names of dances or types of dances. See List of dances and List of dance style categories for those. This glossary lists terms used in various types of ballroom partner dances, leaving out terms of highl ...

, several techniques *

Compression (functional analysis) In functional analysis, the compression of a linear operator ''T'' on a Hilbert space to a subspace ''K'' is the operator :P_K T \vert_K : K \rightarrow K , where P_K : H \rightarrow K is the orthogonal projection onto ''K''. This is a natural wa ...

Compression (phonetics) In phonology, syncope (; from ) is the loss of one or more sounds from the interior of a word, especially the loss of an unstressed vowel. It is found in both synchronic and diachronic analyses of languages. Its opposite, whereby sounds are adde ...

, running syllables together *

Dynamic range compression Dynamic range compression (DRC) or simply compression is an audio signal processing operation that reduces the volume of loud sounds or amplifies quiet sounds, thus reducing or ''compressing'' an audio signal's dynamic range. Compression is c ...

, reducing audio dynamic range

Physical science

Information science

Medicine

Other

See also