Compression may refer to:
Physical science
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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
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Compression member, a structural element such as a column
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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
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Gas compression
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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
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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
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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
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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
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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
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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
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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
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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 ...
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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
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Brain compression, a medical condition
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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
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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, due to nonlinearity
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Compression (dance), several techniques
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Compression (functional analysis)
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Compression (phonetics), running syllables together
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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
See also
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*
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Compaction (disambiguation)
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Compress
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Compression garment
Compression garments are pieces of clothing that fit tightly around the skin. In medical contexts, compression garments provide support for people who have to stand for long periods or have poor Circulatory system, circulation. These come in va ...
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Compressor (disambiguation)
A compressor is a mechanical device that increases the pressure of a gas by reducing its volume.
Compressor may also refer to:
* A device that performs Compression (disambiguation)
* Compressor (audio signal processor), for dynamic range compr ...
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Decompression (disambiguation)
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Expansion (disambiguation)
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