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Qu'est-ce (qui) est audio compression - définition
WIKIMEDIA DISAMBIGUATION PAGE
Audio compression (disambiguation)
lossy audio compression
![Comparison of [[spectrogram]]s of audio in an uncompressed format and several lossy formats. The lossy spectrograms show [[bandlimiting]] of higher frequencies, a common technique associated with lossy audio compression.](https://commons.wikimedia.org/wiki/Special:FilePath/AudiodatenkompressionManowarThePowerOfThySword.jpg?width=200 "Comparison of [[spectrogram]]s of audio in an uncompressed format and several lossy formats. The lossy spectrograms show [[bandlimiting]] of higher frequencies, a common technique associated with lossy audio compression.")
![[[MP3]], an example of a lossy file format compared to [[WAV]].](https://commons.wikimedia.org/wiki/Special:FilePath/MP3 compression.jpg?width=200 "[[MP3]], an example of a lossy file format compared to [[WAV]].")
![Solidyne 922: The world's first commercial audio bit compression [[sound card]] for PC, 1990](https://commons.wikimedia.org/wiki/Special:FilePath/Placa-audioPC-925.jpg?width=200 "Solidyne 922: The world's first commercial audio bit compression [[sound card]] for PC, 1990")
PROCESS OF ENCODING INFORMATION USING FEWER BITS THAN THE ORIGINAL REPRESENTATION
Multimedia compression; Data compression/multimedia compression; Video compression; Data compression algorithm; Compression algorithm; Uncompression; File compression; Data Compression; Block compression; Spatial compression; Temporal compression; Intelligent Compression; Transparent decompression; Compression algorithms; Datacompression; Source Coding; Bit-rate reduction; File compressing; Digital audio compression; Lossless audio compression; Compression program; Compression utility; Coding techniques; Source coding; Audio data compression; Lossless audio; Perceptual audio coding; Video Compression; Lossless Audio; Negabyte; Sound compression; Audio compression (data); Compression software; Decompression software; Compressed data; Video data compression; Video encoding; Encoding software; Data decompression; Lossy audio compression; Uncompressed; Compressed video; Compressed digital video; Digital video compression; Lossless video compression; Text compression; Genetic compression algorithm; Algorithms for lossless data compression; History of video compression; Perceptual audio coder; Compression techniques; Machine learning and data compression; History of audio compression
lossless audio compression
PROCESS OF ENCODING INFORMATION USING FEWER BITS THAN THE ORIGINAL REPRESENTATION
Multimedia compression; Data compression/multimedia compression; Video compression; Data compression algorithm; Compression algorithm; Uncompression; File compression; Data Compression; Block compression; Spatial compression; Temporal compression; Intelligent Compression; Transparent decompression; Compression algorithms; Datacompression; Source Coding; Bit-rate reduction; File compressing; Digital audio compression; Lossless audio compression; Compression program; Compression utility; Coding techniques; Source coding; Audio data compression; Lossless audio; Perceptual audio coding; Video Compression; Lossless Audio; Negabyte; Sound compression; Audio compression (data); Compression software; Decompression software; Compressed data; Video data compression; Video encoding; Encoding software; Data decompression; Lossy audio compression; Uncompressed; Compressed video; Compressed digital video; Digital video compression; Lossless video compression; Text compression; Genetic compression algorithm; Algorithms for lossless data compression; History of video compression; Perceptual audio coder; Compression techniques; Machine learning and data compression; History of audio compression
<audio, compression> Any kind of audio compression in which
the original signal and the decoded signal are bitwise
identical. Lossless audio compression algorithms are usually
based on a data compression algorithm like PKzip or gzip
but specialized for PCM audio data. The signal is divided
into predictable tonal components and unpredictable noisy
components. Tonal components are stored as coefficients of a
predictor, the remaining signal is coded by Rice coding,
Huffman coding or arithmetic coding.
(2001-12-24)
Lossless predictive audio compression
LOSSLESS AUDIO CODING FORMAT
Lossless Predictive Audio Compression
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.
Wikipédia
Audio compression
Audio compression may refer to:
- Audio compression (data), a type of lossy or lossless compression in which the amount of data in a recorded waveform is reduced to differing extents for transmission respectively with or without some loss of quality, used in CD and MP3 encoding, Internet radio, and the like
- Dynamic range compression, also called audio level compression, in which the dynamic range, the difference between loud and quiet, of an audio waveform is reduced
