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Topic: Compression

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	Maximum Compression (lossless data compression software)
		Maximum Compression's goal is to show the maximum achievable data compression ratio for several filetypes (text, executable, jpeg etc).
		PAQ8M is identical to PAQ8L in compression for non JPEG data, it takes #1 place on the SFC benchmark (method 2) and widens the gap to #2 (WinRK).
		THOR 0.3a and QazaR both have better compression while THOR, written in Delphi(!), is also faster then previous version; it now clocks a compression speed of almost 43 MB/s in MFC test.
	www.maximumcompression.com (5644 words)

	Audio level compression - Wikipedia, the free encyclopedia
		Compression is used during sound recording, live sound reinforcement, and broadcasting to improve the perceived quality of audio.
		Compression is used extensively in broadcasting to boost the perceived volume of the sound track while keeping it within strict limits (broadcasters in most countries have legal limits on instantaneous peak volume they may broadcast).
		Compression is also often used in music production to make performances more consistent in dynamic range so that they "sit" in the mix of other instruments better and maintain consistent attention from the listener.
	en.wikipedia.org /wiki/Audio_level_compression (1325 words)

	Physical compression - Wikipedia, the free encyclopedia
		Physical compression is the result of the subjection of a material to compressive stress, resulting in reduction of volume.
		This steam being compressed as the stroke is completed, a cushion is formed against which the piston does work while its velocity is being rapidly reduced, and thus the stresses in the mechanism due to the inertia of the reciprocating parts are lessened.
		In internal combustion engines it is a necessary condition of economy to compress the explosive mixture before it is ignited: in the Otto cycle, for instance, the second stroke of the piston effects the compression of the charge which has been drawn into the cylinder by the first forward stroke.
	en.wikipedia.org /wiki/Physical_compression (256 words)

	Data Compression Record @ ArtisticNudity.com (Artistic Nudity) (Site not responding. Last check: )
		One popular instance of compression that many computer users are familiar with is the ZIP file format, which, as well as providing compression, acts as an archiver, storing many files in a single output file.
		In lossy audio compression, methods of psychoacoustics are used to remove non-audible (or less audible) components of the signal.
		Voice compression is used in Internet telephony for example, while audio compression is used for CD ripping and is decoded by MP3 players.
	www.artisticnudity.com /encyclopedia/Data_compression (1109 words)

	LZW compression - Hutchinson encyclopedia article about LZW compression (Site not responding. Last check: )
		Data compression system used to reduce the size of data files and thus shorten the time needed to transmit them.
		LZW compression is the basis of the GIF graphics interchange format.
		This information should not be considered complete, up to date, and is not intended to be used in place of a visit, consultation, or advice of a legal, medical, or any other professional.
	encyclopedia.farlex.com /LZW+compression (134 words)

	Data compression Info - Encyclopedia WikiWhat.com (Site not responding. Last check: )
		Data compression, a fundamental topic of computer science, is the process of encoding data so that it takes less storage space or less transmission time than it would if it were not compressed.
		In particular, compression of images and sounds can take advantage of limitations of the human sensory system to compress data in ways that are lossy, but nearly indistinguishable from the original.
		Closely allied with data compression are the fields of coding theory and cryptography.
	www.wikiwhat.com /encyclopedia/d/da/data_compression.html (569 words)

	Data Compression
		Data compression may be viewed as a branch of information theory in which the primary objective is to minimize the amount of data to be transmitted.
		Similarly, compressing a file to half of its original size is equivalent to doubling the capacity of the storage medium.
		While the primary focus of this survey is data compression methods of general utility, Section 2 includes examples from the literature in which ingenuity applied to domain-specific problems has yielded interesting coding techniques.
	www.ics.uci.edu /~dan/pubs/DataCompression.html (1050 words)

	LZW Data Compression
		Compression occurs when a single code is output instead of a string of characters.
		This is possible because the compression algorithm always outputs the STRING and CHARACTER components of a code before it uses it in the output stream.
		This means that the compressed data is not burdened with carrying a large string translation table.
	www.dogma.net /markn/articles/lzw/lzw.htm (3973 words)

	What is compression? - a definition from Whatis.com - see also: compressed, Web compression
		Content compression can be as simple as removing all extra space characters, inserting a single repeat character to indicate a string of repeated characters, and substituting smaller bit strings for frequently occurring characters.
		Compression is performed by a program that uses a formula or algorithm to determine how to compress or decompress data.
		Graphic image compression can be either lossy (some information is permanently lost) or lossless (all information can be restored).
	searchstorage.techtarget.com /sDefinition/0,,sid5_gci211828,00.html (438 words)

	Download Compression tools - Softpedia
		This is a easy-to-use, but powerful and fast compress utility.
		KGB Archiver is the compression tool with unbelievable high compression rate.
		Compress, encrypt and archive entire directory structures into an encrypted archive, and then to uncompress and decrypt the same
	www.softpedia.com /get/Compression-tools (388 words)

	Compressing Web Content with mod_gzip and mod_deflate \| Linux Journal (Site not responding. Last check: )
		When using compression algorithms, the difference between standard and maximum compression levels is small, especially when you consider the extra CPU time necessary to process these extra compression passes.
		The compression ratio for the test files ranged from no compression for files that were less than 300 bytes to 15% of the original file size for two Linux SCSI Programming HOWTOs.
		Compression ratios do not increase in a linear fashion when compared to file size; rather, compression depends heavily on the repetition of content within a file to gain its greatest successes.
	www.linuxjournal.com /article/6802 (2380 words)

	Speech Compression
		With current compression techniques (all of which are lossy), it is possible to reduce the rate to 8 kbps with almost no perceptible loss in quality.
		Further compression is possible at a cost of lower quality.
		ADPCM (32000 bps) This is speech compressed using the Adaptive Differential Pulse Coded Modulation (ADPCM) scheme.
	www.data-compression.com /speech.html (940 words)

	Digital Domain (Site not responding. Last check: )
		Compression is a tool; when used by skilled hands, it has produced some of the most beautiful recordings in the world.A lot of music genres are based on the sound of compression, from Disco to Rap to Heavy Metal.
		Buss compression causes all the instruments to be modulated by the attack and transients of the loudest instrument.
		There should be three compression settings--for background listening at low levels, for moderate listening in a noisy environment, and for parties, whereyou want to switch discs without adjusting the volume control.
	www.digido.com /portal/pmodule_id=11/pmdmode=fullscreen/pageadder_page_id=33 (5210 words)

	Harmony Central®: Effects Explained: Compression/Limiting
		In the studio, compression is a useful tool when cutting tracks and adjusting the mix.
		One popular use of compression is to increase an instrument's sustain.
		A little compression will keep the instrument's level from changing radically after it's plucked, which is perceived as increased sustain or a 'smoothing' of instrument.
	www.harmony-central.com /Effects/Articles/Compression (1713 words)

	Compression
		In the diagram above the transition from unity gain to compression at the threshold of compression/limiting is gradual instead of a straight line.
		The aim of compression is to make the instrument sound louder, to squeeze the dynamic range, therefore you may wish to lengthen the attack time and let the transients through (to be dealt with by a limiter if necessary) and the compressor will then be working on sustained levels above the threshold.
		The centre section is the compression section with the standard controls over threshold, ratio, attack and release.
	www.saecollege.de /reference_material/pages/Compression.htm (1657 words)

	Optimizing Web Graphics: Compression - webreference.com
		While the LZW compression algorithm used by GIFs is one of the better general purpose compression algorithms, it wasn't designed specifically for graphics.
		Compression and decompression times are symmetric, although the International JPEG Group's (IJG) decoder is more optimized and noticeably faster than their encoder.
		JPEG compression takes place in Y/UV space and therefore is treated as 24 bit data (8 bit for grey), regardless of the colors in the original image.
	www.webreference.com /dev/graphics/compress.html (3850 words)

	Compressing and Decompressing Data using Java
		This is especially true if you wish to compress and decompress data on the fly (before transferring it to a remote machine for example).
		Note that data compression can be implemented on existing hardware by software or through the use of special hardware devices that incorporate compression techniques.
		Compressing data on the fly, however, improves the performance of client/server applications only when the objects being compressed are more than a couple of hundred bytes.
	java.sun.com /developer/technicalArticles/Programming/compression (2680 words)

	THE MERCK MANUAL, Sec. 14, Ch. 182, Spinal Cord Disorders
		Acute compression is usually traumatic, producing signs of segmental damage at the level of compression usually combined with corticospinal tract dysfunction (eg, hyperreflexia, Babinski's sign, weakness) and sensory deficits below the level of compression (see Spinal Cord Injury, below).
		Chronic compression may be caused by bony or cartilaginous protrusions into the cervical, thoracic, or lumbar spinal canal (eg, from osteophytes or spondylosis, especially in patients with a congenitally narrow spinal canal--see Cervical Spondylosis in Ch.
		The course of chronic compression is substantially slower than that of subacute compression; serious symptoms may take months or years to develop.
	www.merck.com /pubs/mmanual/section14/chapter182/182b.htm (496 words)

	Compression: Digital Imaging: Glossary: Learn: Digital Photography Review
		For instance, if you compress a document into a ZIP file and later extract and open the document, the content will of course be identical to the original.
		TIFF is an image format that can be compressed in a lossless way.
		Lossy compression reduces the image size by discarding information and is similar to summarizing a document.
	www.dpreview.com /learn?/Glossary/Digital_Imaging/Compression_01.htm (326 words)

	What is data compression? - A Word Definition From the Webopedia Computer Dictionary
		Data compression is particularly useful in communications because it enables devices to transmit or store the same amount of data in fewer bits.
		Data compression is also widely used in backup utilities, spreadsheet applications, and database management systems.
		Certain types of data, such as bit-mapped graphics, can be compressed to a small fraction of their normal size.
	www.webopedia.com /TERM/d/data_compression.html (306 words)

	Cognition as Compression
		There is solid evidence that first language learning by children may, to a large extent, be understood as information compression (see the publications that may be obtained from that page, especially Learning syntax and meanings through optimization and distributional analysis).
		'Cognition as compression' has provided the inspiration for a programme of research on Computing as Compression, developing the conjecture that all kinds of computing and formal reasoning may usefully be understood as information compression by pattern matching, unification and search - and developing a 'new generation' computing system based on the theory.
		Much of this research is relevant to understanding human cognition as described in two 'overview' articles (Multiple alignment, cognition and computing (short) and Information compression by multiple alignment, unification and search as a unifying principle in computing and cognition (long)) and in several other publications.
	www.cognitionresearch.org.uk /cognition.html (462 words)

	Compression (Java 2 Platform SE v1.4.2)
		Class Compression is a printing attribute class, an enumeration, that specifies how print data is compressed.
		Compression is an attribute of the print data (the doc), not of the Print Job.
		If a Compression attribute is not specified for a doc, the printer assumes the doc's print data is uncompressed (i.e., the default Compression value is always
	java.sun.com /j2se/1.4.2/docs/api/javax/print/attribute/standard/Compression.html (274 words)

	Compression C++ Class Source Code for DirectX Game Library (Site not responding. Last check: )
		Flexibility is provided for developers to supply their own compression algorithms to compress image data serialized to disk.
		This is a basic run-length encoded compression algorithm that is most useful in images with large areas filled with one color, such as transparent images.
		Compression is achieved by creating a compression object, such as an instance of CK_RLE, and telling an instance of CK_Image to use it via the setCompression() method.
	www.chilkatsoft.com /ChilkatDx/compress.htm (354 words)

	IIS Compression in IIS6.0 (Site not responding. Last check: )
		Yet the compression for level 9 is nearly as good as level 10.
		They claim (I have no doubts they are correct) that their compression logic can work with more browsers and even some browsers that request compression but don't handle it correctly.
		This built in compression i speak of can be access from the system manager, then going to the http protocol under your server serving owa, going to the exchange virtual server properties, and then the settings tab.
	weblogs.asp.net /owscott/archive/2004/01/12/57916.aspx (5131 words)

	Compression (Site not responding. Last check: )
		There are many various compression method with character string compression among them.
		It is usually used for text compression, especially for program source codes.
		A simple compression method exchanges these repeating words with their codes.
	acm.uva.es /p/v6/625.html (332 words)

	HTTP Compression Speeds up the Web: WebReference.com
		The idea is to compress data being sent out from your Web server, and have the browser decompress this data on the fly, thus reducing the amount of data sent and increasing the page display speed.
		To do this the data must be analyzed and compressed in real time and be decompressed with no user interaction at the other end.
		Compressing HTML can have a major impact on the performance of HTTP especially as PPP lines are being filled up with data and the only way to obtain higher performance is to reduce the number of bytes transmitted.
	www.webreference.com /internet/software/servers/http/compression (901 words)

	Technorati Tag: compression
		Compression at MSN Shopping Find great deals on a wide selection of computers.
		Filed under: Compression — Administrator @ 12:58 pm I was looking at some press release video today that was encoded with Windows Media and it’s still...
		Compression Compare prices on a wide variety of home supplies and save money.
	www.technorati.com /tag/compression (520 words)

	compression from FOLDOC (Site not responding. Last check: )
		The standard Unix compression utilty is called compress though GNU's superior gzip has largely replaced it.
		When compressing several similar files, it is usually better to join the files together into an archive of some kind (using tar for example) and then compress them, rather than to join together individually compressed files.
		This is because some common compression algorithms build up tables based on the data from their current input which they have already compressed.
	foldoc.org /foldoc/foldoc.cgi?compression (222 words)

	Structure in Terms of Compression & Tension (Site not responding. Last check: )
		The compressive units of Pleroma are masses that have collapsed under gravity.
		His goal was for man to balance compression with tension in imitation of nature.
		The words may be compressive; his actions and the actions of those around him may be compressive; but the irony is tensional: as is the humor.
	www.pkimaging.com /mik/macroinformation/views/tension/tension.html (1087 words)

	MSU Lossless Video Codec
		When choosing any variant of quality and compression mode, graphics in the top side of the window show expected quality, compression ratio, compression speed and decompression speed.
		Compression method allows you to choose compression algorithm - the new one or the old one.
		The new one is much faster on compression and decompression, but the old one gives better compression on most files (but on some files the new method works better).
	www.compression.ru /video/ls-codec/index_en.html (843 words)

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