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	Lossless data compression - Wikipedia, the free encyclopedia
		Lossless data compression is a class of data compression algorithms that allows the exact original data to be reconstructed from the compressed data.
		Lossless data compression is used in software compression tools such as the highly popular ZIP file format, used by PKZIP, WinZip and Mac OS 10.3, and the Unix programs bzip2, gzip and compress.
		Lossless compression is used when it is important that the original and the decompressed data be identical, or when no assumption can be made on whether certain deviation is uncritical.
	en.wikipedia.org /wiki/Lossless_data_compression (1007 words)

	Apple Lossless - Wikipedia, the free encyclopedia
		Apple Lossless (also known as Apple Lossless Encoder, ALE, or Apple Lossless Audio Codec, ALAC) is an audio codec developed by Apple Computer for lossless encoding of digital music.
		It is not a variant of AAC, but instead uses linear prediction [1] similar to other lossless codecs such as FLAC and Shorten.
		The Apple Lossless Encoder was introduced as a component of QuickTime 6.5.1 on April 28, 2004 and thus as a feature of iTunes 4.5.
	en.wikipedia.org /wiki/Apple_Lossless_Encoding (244 words)

	TTA - Wikipedia, the free encyclopedia
		True Audio (abbreviated TTA) is a free, simple real-time lossless audio codec, based on adaptive prognostic filters which has shown satisfactory results comparing to majority of modern analogs.
		TTA performs lossless compression on multichannel 8, 16 and 24 bit data of uncompressed wav input files.
		Being "lossless" means that no data/quality is lost in the compression - when decompressed, the data will be identical to the original.
	en.wikipedia.org /wiki/TTA (208 words)

	Encyclopedia: Lossless
		Lossless data compression is a class of data compression algorithms that allow the original data to be reconstructed exactly from the compressed data.
		Lossless compression is used when it is important that the original and the decompressed data are exactly identical, or when no assumption can be made on whether certain deviation is uncritical.
		Good compression algorithms are those that achieve shorter output on input distributions that occur in real-world data.
	www.nationmaster.com /encyclopedia/Lossless (964 words)

	[No title]
		Lossless Compression Handbook explains the process of compression and transmission of multimedia signals (images, text, audio, and data) so that the decompressed or reconstructed data exactly match the original.
		Lossless compression is most important for content that leaves no margin for error, says Sayood.
		Lossless compression is more commonly used in text, data, image, and audio applications than in video applications, says Sayood.
	www.emedialive.com /Articles/PrintArticle.aspx?ArticleID=5092 (997 words)

	Lossless data compression - Wikipedia, the free encyclopedia
		Lossless data compression algorithms cannot guarantee to compress (that is make smaller) all input data sets.
		Thus any lossless compression algorithm that makes some files shorter must necessarily make some files longer.
		Sound data, for instance, cannot be compressed well with conventional text compression algorithms.
	en.wikipedia.org /wiki/Lossless (1007 words)

	Radified Guide to lossless audio compression [loss less]
		Lossless codecs merely shrink the size of the original file/song by >compressing< it [usually by half].
		The folks who hang out at the Hydrogen Audio forums use FLAC as their lossless codec of choice, because it allows everyone to participate in listening tests, regardless of which operating system they use.
		Lossless codecs represent the holy grail of audio archiving, as far as fidelity is concerned.
	mp3.radified.com /lossless.htm (2358 words)

	Theory of Data Compression
		It is possible to compress the source, in a lossless manner, with compression rate close to H.
		Lossless data compression theory and rate-distortion theory are known collectively as source coding theory.
		In lossless data compression, the compressed-then-decompressed data is an exact replication of the original data.
	www.data-compression.com /theory.html (2876 words)

	[1.0] Introduction / Lossless Data Compression (Site not responding. Last check: 2007-11-06)
		Lossless data compression is used when the data has to be uncompressed exactly as it was before compression.
		Lossless compression ratios are generally in the range of 2:1 to 8:1.
		* A more sophisticated and efficient lossless compression technique is known as "Huffman coding", in which the characters in a data file are converted to a binary code, where the most common characters in the file have the shortest binary codes, and the least common have the longest.
	www.vectorsite.net /ttdcmp1.html (5166 words)

	Neil's World - Apple Lossless Encoder
		The downside to this is that files compressed using lossless compression are typically quite a bit larger than their lossy counterparts.
		Thankfully, lossless formats are easier to compare since output quality isn’t a factor, but a good format will have quick encoding, a small output file size, many features, and would preferably be open source too.
		The most popular is FLAC (Free Lossless Audio Codec), which is now being steered by the Xiphophorus Foundation who are also steering the Ogg Vorbis format.
	www.neilturner.me.uk /2004/May/09/apple_lossless_encoder.html (1206 words)

	Lossless compression vs. speed
		Encouraged lately by some new and improved lossless audio formats, I got curious how all these would compare in a graphical form, as a function of their (realtime) speed.
		To have the harddisk's performance as constant as possible, I kept it defragged before running each batchfile, and erased the generated lossless- and wav files afterwards, so the files got placed in about the same place on the harddisk.
		Lossless Encoding forum of Hydrogen Audio, and the original thread that made me start this page.
	web.inter.nl.net /users/hvdh/lossless/main.htm (360 words)

	Conditions for Lossless Scattering
		We now present a theorem characterizing the condition of losslessness in terms of the eigenvalues and eigenvectors of the scattering matrix.
		This shows the eigenvalues of every lossless scattering matrix lie on the unit circle.
		Theorem 3 can be extended to lossless junctions of lossy waveguides, as the reader can easily verify by applying the above proof to (27).
	ccrma-www.stanford.edu /~jos/wgj/Conditions_Lossless_Scattering.html (214 words)

	Lossy Compression
		For example, medical imaging prefers lossless image compression, since compressing digital radiographs with lossy techniques may divert diagnosis accuracy.
		Applications such as astronomical imaging also require lossless compression, since the image is going to be processed by computing devices instead of human eyes.
		But as in lossless digital data compression, there is a trade-off of compression ratio for the error-free reconstruction.
	www.csi.edu /support/itc/pres2/lossless.htm (159 words)

	MPEG-4 Audio Lossless Coding (ALS)
		Lossless audio coding enables the compression of digital audio data without any loss in quality due to a perfect reconstruction of the original signal.
		Applying lossless entropy coding methods such as Lempel-Ziv, Huffman or arithmetic coding directly to the audio signal is not very efficient due to the long-time correlations and the high range of values.
		Although the combination of analysis and synthesis filter is not lossless in general, lossless processing can be achieved if some basic conditions are observed.
	www.nue.tu-berlin.de /forschung/projekte/lossless/mp4als.html (1037 words)

	DataCompression.info - Lossless Compression (Site not responding. Last check: 2007-11-06)
		To eliminate the problem of choosing between lossless and near lossless, DualStream has an option to create a correction file, which may be eventually stored separately and used at a later time to restore the original.
		The advantage is that the two files (near lossless and correction) have together approximately the size of the lossless coded original file.
		Like other lossless compression schemes the data reduction varies with the source, but it is generally between 25% and 50% for typical popular music and somewhat better than that for classical music and other sources with greater dynamic range.
	datacompression.info /Lossless.shtml (7119 words)

	Digital Compression
		Lossless compressors produce an exact replica of the original source.
		Lossless compression is the only way to preserve the "CD Quality" level of your program material.
		One proponent of Lossless Compression is Etree.org a music distribution hub but not for audio that has been compressed in a lossy fashion like MP3 or AAC but for audio that has been compressed in a lossless way.
	www.puredigitalaudio.org /digitalcompression/index.shtml (713 words)

	Lossless audio compression
		Links to material concerning the lossless compression (data reduction) of digital audio signals, including some other programs (such as RAR) which I did not test as fully as those listed above, because initial tests indicated their compression ratios were not as good.
		Thanks to Alexandre Enkerli for alerting me to this.) A new algorithm suitable for lossless or lossy compression of audio and other similar signals has been developed by DAKX in North Carolina: http://www.dakx.com The algorithm is patented in the US: http://www.patents.ibm.com/details?patent_number=5825830.
		There is a test there on lossless compression of 8 bit audio files, but I am really only interested in 16 bit stereo files, which are a very different thing.
	www.firstpr.com.au /audiocomp/lossless/index1998.html (4812 words)

	Lossless Wavelet Compression
		This web page discusses lossless data compression using integer to integer wavelet transforms and an integer version of the wavelet packet transform.
		Applications for lossless compression include compression of experimental data and compression of financial time series (for example, the bid/ask time series that arise from intra-day trading).
		Lossless compression algorithms are used to compress data where loss cannot be tolerated.
	www.bearcave.com /misl/misl_tech/wavelets/compression (3163 words)

	Lossless audio compression
		In my 1998 tests I was not interested in speed, but in November 2000, in view of the fact that the compression ratios of the leading programs were fairly similar, I decided to test their speed as well, since this varies enormously.
		FLAC (Free Lossless Audio Coder) was released in an Alpha form on 10 December 2000.
		In a lossless audio compression program, a major task is to store a larege body of signed integers of varying lengths.
	www.firstpr.com.au /audiocomp/lossless (7537 words)

	Hydrogenaudio Forums -> screw-ups in lossless codecs
		But a lossless encoding of such an extracted file would be encoded exactly as it exists, errors and all.
		This is why you should keep backups (for me, lossless files stored on hard drive with DVD backups stored in a dry, no sunlight environment).
		This effect, however, is not specific to lossless encoders, even though lossless encoders might be especially sensitive to it, just like some other applications.
	www.hydrogenaudio.org /forums/index.php?showtopic=19998 (685 words)

	Lossless Data Compression
		The main objective of this page is to introduce two important lossless compression algorithms: Huffman Coding and Lempel-Ziv Coding.
		Mainly for this reason, the Lempel-Ziv code is the most widely used technique for lossless file compression.
		Huffman codes are optimal in the sense that no other lossless fixed-to-variable length code has a lower average rate.
	www.data-compression.com /lossless.html (932 words)

	Apple's lossless compression makes iTunes an audiophile's delight
		Almost hidden away in the improvements in the current version is a new, lossless method of compressing audio for your iTunes collection.
		The only other lossless audio compression method, available for Windows, Mac OS, Mac OS X and Linux, is FLAC, which stands for "free lossless audio codec." FLAC is sometimes used by bands that want to release their music on the Internet but don't want to compromise on audio quality.
		Unlike most CDs, my live digital recordings are unrelenting in their variations in loudness and quietness (I used no limiters), and the lossless encoding handled the wide dynamic range very well.
	aroundcny.com /technofile/texts/mac060204.html (419 words)

	LPAC - Lossless Predictive Audio Compression
		LPAC is a codec (coder / decoder) for lossless compression of digital audio files.
		"Lossless" means that any compressed file can be decompressed in a way it will be bit-wise identical with the original.
		The new PAC file format (v5) has a CRC checksum to indicate lossless processing, and there are some compression enhancements associated with this new file format.
	www.nue.tu-berlin.de /wer/liebchen/lpac.html (1705 words)

	Alparysoft R&D - Products (Site not responding. Last check: 2007-11-06)
		The next version of codec will be supplemented with visually lossless compression algorithm, where source and decoded video have some mathematical differences, but not different visually.
		Lossless compression - on selecting this option codec encodes video without any mathematical losses, i.e.
		Visually lossless compression - on selecting this option codec encodes video with mathematical losses, but without video deterioration (on the right fitting of compression level).
	www.alparysoft.com /prod/lossless-video-codec.phtml (837 words)

	Dummies Guide to Lossless
		Lossless audio groups are for people who want an exact replica of the original music material source.
		On the other hand, if you view the exercise as lossless enthusiasts do, and accept that some substantial active input from your part is needed (even just to download and play the music, let alone to upload), then this may be for you a home with new horizons of enjoyment & satisfaction.
		Since there are several lossless compression applications around, downloading files from a.b.s.l and being able to use them (which means "decoding" them into WAV files in order to burn your CD) would suggest having to install all of these apps.
	lossless.free.fr (13642 words)

	True Audio Software :: TTA Lossless Audio Codec :: Format Description
		Simple and stable lossless audio data format for real-time compressing of digital music.
		TTA lossless audio data format has a very simple structure.
		The total number of frames in data stream can be calculated as a quotient of overall count of samples and "frame length".
	www.true-audio.com /codec.format (292 words)

	Digital image file types
		A lossless algorithm might, for example, look for a recurring pattern in the file, and replace each occurrence with a short abbreviation, thereby cutting the file size.
		In practice, TIFF is used almost exclusively as a lossless image storage format that uses no compression at all.
		Though lossless, it is a factor of three of four smaller than TIFF files of the same image.
	www.wfu.edu /~matthews/misc/graphics/formats/formats.html (1694 words)

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