* Formats with lossless compression, such as FLAC, Monkey's Audio ( filename extension APE ), WavPack ( filename extension WV ), TTA, ATRAC Advanced Lossless, Apple Lossless ( filename extension m4a ), MPEG-4 SLS, MPEG-4 ALS, MPEG-4 DST, Windows Media Audio Lossless ( WMA Lossless ), and Shorten ( SHN ).

* ALAC-Apple Lossless compression, a lossless compression format from Apple.

* flac – File format for the Free Lossless Audio Codec, a lossless compression codec.

* Lossless data compression

Lossless compression reduces bits by identifying and eliminating statistical redundancy.

Lossless data compression algorithms usually exploit statistical redundancy to represent data more concisely without losing information.

Lossless compression is possible because most real-world data has statistical redundancy.

Lossless audio compression produces a representation of digital data that decompresses to an exact digital duplicate of the original audio stream, unlike playback from lossy compression techniques such as Vorbis and MP3.

Lossless compression is unable to attain high compression ratios due to the complexity of wave forms and the rapid changes in sound forms.

# REDIRECT Lossless compression

Lossless compression of digitized data such as video, digitized film, and audio preserves all the information, but can rarely do much better than 1: 2 compression because of the intrinsic entropy of the data.

* Lossless data compression

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 many applications.

Lossless compression is used in cases where it is important that the original and the decompressed data be identical, or where deviations from the original data could be deleterious.

Lossless compression methods may be categorized according to the type of data they are designed to compress.

Lossless data compression algorithms cannot guarantee compression for all input data sets.

When the music is stored in an audio file format that is lossless such as FLAC, Monkey's Audio or WMA Lossless, the computer playback of recorded audio can serve as an audiophile-quality source for a hi-fi system.

Lossless audio formats are most often used for archiving or production purposes, with smaller lossy audio files being typically used on portable players and in other cases where storage space is limited and / or exact replication of the audio is unnecessary.

A lossless codec, WMA Lossless, compresses audio data without loss of audio fidelity ( the regular WMA format is lossy ).

ATRAC Advanced Lossless ( AAL ) is the latest update to the codec family.

ATRAC Advanced Lossless is widely supported in older Walkman players and SonicStage version 4 or later.

Lossless compression is provided by the use of a reversible integer wavelet transform in JPEG 2000.

FLAC (; Free Lossless Audio Codec ) is a codec ( compressor-decompressor or coder-decoder ) which allows digital audio to be losslessly compressed such that file size is reduced without any information being lost.

Dolby TrueHD, developed by Dolby Laboratories, is an advanced lossless audio codec based on Meridian Lossless Packing.

Additionally, variable rate encoding is inherent in lossless compression schemes such as FLAC and Apple Lossless.

Lossless Transform Audio Compression ( LTAC ) is a compression algorithm developed by Tilman Liebchen, Marcus Purat and Peter Noll at Institute for Telecommunications, Technical University Berlin ( TU Berlin ), to compress PCM audio in a lossless manner, unlike conventional lossy audio compression algorithms ( like MP3 ).

LTAC will not be developed any further since it has been superseded by its successor Lossless Predictive Audio Compression ( LPAC ), which is based on linear prediction.

Lossless predictive audio compression ( LPAC ) is an improved lossless audio compression algorithm developed by Tilman Liebchen, Marcus Purat and Peter Noll at Institute for Telecommunications, Technical University Berlin ( TU Berlin ), to compress PCM audio in a lossless manner, unlike conventional audio compression algorithms which are lossy.

Meanwhile it is no longer developed because an advanced version of it has become an official standard under the name of MPEG-4 Audio Lossless Coding.

Meridian Lossless Packing, also known as Packed PCM ( PPCM ), is a proprietary lossless compression technique for compressing PCM audio data developed by Meridian Audio, Ltd. MLP is the standard lossless compression method for DVD-Audio content ( often advertised with the Advanced Resolution logo ) and typically provides about 1. 5: 1 compression on most music material.

* Lossless codecs: There are also many lossless codecs which are typically used for archiving data in a compressed form while retaining all of the information present in the original stream.

Since Windows Media Player 9 Series, the player supports crossfading, audio dynamic range ( Quiet Mode ) for WMA Pro and WMA Lossless, and auto volume leveling for certain media which includes volume level / gain information such as MP3 or Windows Media.

Currently known as " Media Player 10 Mobile ", this edition ( released in October 2004 ) closely resembles the capabilities of the Windows version of WMP 10, including playlist capabilities, a media library, album art, WMA Lossless playback, support for DRM-protected media, video playback at 640x480 with stereo sound, and the same Energy Blue interface aesthetics also seen in recent versions of Windows XP Media Center Edition.

* ICER reverts to a separate internal LOCO ( Low Complexity Lossless Compression ) compressor for lossless image compression.

* Meridian Lossless Packing, a lossless compression codec for audio data

* Meridian Lossless Packing ( lossless coding for DVD-Audio )

Apple Lossless, also known as Apple Lossless Audio Codec ( ALAC ), or Apple Lossless Encoder ( ALE ), is an audio codec developed by Apple Inc. for lossless data compression of digital music.

After initially being proprietary for many years, in late 2011 Apple open sourced and made royalty-free the Apple Lossless codec.

The Apple Lossless Encoder ( the software for encoding into ALAC files ) was introduced into the Mac OS X Core Audio framework on April 28, 2004 together with the QuickTime 6. 5. 1 update, and thus available in iTunes as of version 4. 5 and above.

The open source library libavcodec incorporates both a decoder and an encoder for Apple Lossless format which means that media players based on that library, including VLC media player and MPlayer, are able to play Apple Lossless files, as well as many media centre applications for home theatre computers, such as Plex, XBMC, and Boxee.