Lossless data compression (7645 bytes)
1: ... the compressed data. Contrast with [[lossy data compression]].
3: Lossless data compression is used in software compression tools such as the highly popular [[ZIP file forma...
4: ... important that the original and the decompressed data are exactly identical, or when no assumption can ...
5: ...e others like [[TIFF]] and [[MNG]] may use either lossless or lossy methods.
6: [[GIF]] uses a technically lossless compression method, but most GIF implementations are incapabl...

Lossless Predictive Audio Compression (905 bytes)
1: ...[audio compression]] algorithms which are [[lossy compression|lossy]].
3: ... Audio - Free Lossless Codec (TTA)]], [[FLAC|Free Lossless Audio Codec (FLAC)]]
6: .../wer/liebchen/lpac.html Lossless Predictive Audio Compression (LPAC)]
7: ...heory The basic principles of lossless audio data compression (TTA)]

Lossless Transform Audio Compression (LTAC) (916 bytes)
1: ... conventional [[lossy compression|lossy]] [[audio compression]] algorithms (like [[MP3]]).
3: ...it much faster than LTAC and even leads to better compression results. LTAC will not be developed any further.
5: ''See also:'' [[Lossless Predictive Audio Compression (LPAC)]]
8: ...ttp://www.nue.tu-berlin.de/wer/liebchen/ltac.html Lossless Transform Coding (LTAC) of Audio Signals]

Data compression (8017 bytes)
1: ...that the word "compression" is encoded as "CP!". Compression only works when both the [[sender]] and [[receive...
5: ...ata in order to achieve higher compression (lossy compression).
8: ...as spreadsheets, text, executable programs, etc., losslessness is essential because changing even a single b...
10: ...mitations of the human sensory system to compress data in ways that are lossy, but nearly indistinguisha...
12: ...n is therefore lossy compression. Different audio compression standards are listed under [[audio codecs]]. Thi...

Transparency (data compression) (449 bytes)
1: ...ther words, transparency is the situation where [[compression artifact]]s are nonexistent or imperceptible.

Data compression ratio (424 bytes)
1: ...al compression ratio used to measure the physical compression of substances. Ratios are generally expressed as...
3: ...10MB file that compresses to 2MB would have a 5:1 compression ratio.

Audio data compression (7026 bytes)
1: ...audio signals, or [[companding]], which uses both compression and complementary dynamic range expansion as a n...
5: ...ta compression|lossy]]" algorithms to achieve the compression effect.
7: == Lossless compression ==
9: ...consumers who disdain the quality loss from lossy compression techniques such as [[Vorbis]] and [[MP3]].
11: ...ed [[waveform]]s that present a challenge to many compression algorithms. This is due to the nature of audio w...

Lossy data compression (3236 bytes)
1: ...e enough" to be useful in some way. This type of compression is used frequently on the Internet and especially...
3: There are two basic lossy compression schemes:
7: ...The error between the predicted data and the real data, together with any extra information needed to re...
12: [[Lossless data compression|lossless]] methods is that in some cases a lossy method ca...
13: ...uce a much smaller compressed file than any known lossless method, while still meeting

Four-stage model of data compression (5688 bytes)
1: Almost all [[data compression]] systems can be viewed as comprising
2: '''four successive stages of data processing''' arranged as a processing [[pipeline...
12: The ubiquitous compression pipeline (A-B-C-D) is what is of interest.
14: ...ssy compression often follows the same pattern as lossless, but with one or more quantization steps somewher...
16: * (B) Organization by context often means data reordering, for which a simple but good example i...

Lossless Audio (689 bytes)
1: ...s exactly identical to the original. However, the compression ratio is thus far lower than that for .mp3 files ...
6: * Best compression currently available (see comparison).
10: External link: http://www.lossless-audio.com

Apple Lossless (1102 bytes)
1: ...[Apple Computer]] for [[Lossless data compression|lossless]] [[encoding]] of digital [[music]].
3: ... connector and recent [[firmware]] can play Apple Lossless encoded files. It does not utilize any [[DRM]] sc...
5: ...t half the storage space"'' that the uncompressed data would require.
7: The Apple Lossless Encoder was introduced as a component of [[QuickT...
19: [[de:Apple Lossless]]

Meridian Lossless Packing (350 bytes)
1: ...esolution logo), and typically provides about 2:1 compression on most music material.

Compression (325 bytes)
1: There are several types of '''compression''':
3: *[[physical compression]]
4: *[[data compression]]
5: **[[multimedia compression]]
6: **[[image compression]]

Volume (compression) (649 bytes)
1: A '''volume''' is a term in [[data compression]] for a file who has been compressed and split in...
3: ...affected instead of the whole. Second, it allows compression to a volume size compatible with removable media....
7: === Compression utilities with volume support ===

Compression ratio (2339 bytes)
1: The '''compression ratio''' is a single number that can be used to p...
3: To calculate the compression ratio;<br>
14: == Saab Variable Compression engine ==
15: ...on chamber volume are almost always constant, the compression ratio for a given engine is almost always constan...
17: ...sub>), which, via the above equation, changes the compression ratio (CR).

Wavelet compression (1899 bytes)
1: ...]. A certain loss of quality is accepted ([[lossy compression]]).
3: ... sky. This means that the transient elements of a data signal can be represented by a smaller amount of ...
5: ...rm]] with a wavelet transform to produce a hybrid compression method that would be good at representing a mix o...
14: Examples for wavelet compression:
21: [[Category:Lossy compression algorithms]]

Compression fitting (509 bytes)
1: Compression fittings are used in [[Plumbing]] to join two pip...
3: Compression fittings work by the application of force to the ...
9: ...iydata.com/techniques/plumbing/joints/compression/compression.htm

Image compression (3301 bytes)
1: ...e able to store or [[data transmission|transmit]] data in an efficient form.
3: ...ssy compression|lossy]] or [[lossless compression|lossless]].
4: Lossless compression is preferred for artificial images such as techni...
5: ...use lossy compression methods usually introduce [[compression artifact]]s near sharp edges.
8: Methods for lossless image compression are:

Signal compression (1577 bytes)
1: ...This should probably be merged with [[Audio level compression]] or [[Companding]]''
3: In [[telecommunication]], the term '''signal compression''' has the following meanings:
7: Signal compression is usually expressed in [[Bel|dB]].
11: Signal compression is usually accomplished by separate devices calle...
13: [[Signal]] compression (in dB) may be a linear or nonlinear function of ...

Bandwidth compression (620 bytes)
1: In [[telecommunication]], the term '''bandwidth compression''' has the following meanings:
2: ...andwidth]] needed to transmit a given amount of [[data]] in a given [[time]].
3: ... of the time needed to transmit a given amount of data in a given bandwidth.
5: ''Note:'' Bandwidth compression implies a reduction in normal bandwidth of an [[i...
6: This can be accomplished with [[data compression]] techniques.

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