[permalink] [id link]
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.
from
Wikipedia
Some Related Sentences
Lossless and audio
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.
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 ).
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.
* Lossless audio formats, a performance comparison of lossless audio formats, including Shorten.
Category: Lossless audio codecs
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.
* Lossless audio formats comparison: measuring FLAC against five other lossless audio formats
Category: Lossless audio codecs
Dolby TrueHD, developed by Dolby Laboratories, is an advanced lossless audio codec based on Meridian Lossless Packing.
The iPod line can play several audio file formats including MP3, AAC / M4A, Protected AAC, AIFF, WAV, Audible audiobook, and Apple Lossless.
Audiophiles play music from a wide variety of sources including phonograph records, compact discs ( CDs ), and digital audio file formats that are uncompressed as well as ones that are compressed using lossless data compression such as FLAC, Windows Media Audio 9 Lossless and Apple Lossless ( ALAC ).
* FLAC ( Free Lossless Audio Codec ), an audio data compression scheme
Category: Lossless audio codecs
* Windows Media Player related audio codecs: WMA1, WMA2, WMA Pro and WMA Lossless
Lossless and compression
* 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 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 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.
Lossless and digital
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.
DTS-encoded CDs ripped to Apple Lossless audio files-which decode as digital white noise in iTunes-will play back correctly when the AirPort Express is connected via TOSLINK to a DTS-compatible amplifier – decoder.
* Apple Lossless ( also Apple Lossless Audio Codec ), an audio codec developed by Apple Inc. for lossless data compression of digital music
Mp3Splt is a command line utility to split mp3 ( VBR supported ) and ogg files selecting a begin and an end time position, without decoding, thus avoiding digital generation loss ( see also Lossy compression # Lossless editing ).
Lossless and data
* 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.
* Lossless data compression – Data compression without loss of information
As with the FLAC and Apple Lossless format, files encoded to Monkey's Audio are typically reduced to about half of the original size, with data transfer rates and bandwidth requirements being reduced accordingly.
Lossless and original
ATRAC Advanced Lossless provides " scalable " compression ; it records a lossy ATRAC3 or ATRAC3plus stream, and supplements it, in the same file, with a stream of correction information that allows the original signal to be reproduced, if desired.
When re-ripping such a CD one could use a lossless audio codec such as AIFF, Apple Lossless, FLAC or WAV however such files take up significantly more space than the original. mp4 files.
Standard audio CDs ripped in iTunes into Apple Lossless format streamed to the Airport Express will output a bit-for-bit identical bitstream when compared to the original CD ( provided any sound enhancement settings in iTunes are disabled ).
" Lossless " means that the output from the decompressor is bit-for-bit identical with the original input to the compressor.
Lossless compression algorithms reduce file size while preserving a perfect copy of the original uncompressed image.
0.134 seconds.