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Audio codecs

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Audio codecs are technologies which compress relevant information of audio into a code.


Most popular audio codecs are:

  • MP3 (MPEG-1 layer 3 audio codec)
  • AAC (advanced audio codec)
  • WMA (windows media, based on AAC)


They are all based on quite similar algorithms.


In audio-only files, file format usually allows only one codec,

but audio codecs are also used in video files, which usually allow almost any codec to be used.


See also: Audio file format, Video file formats, Audio compression, Audio storage, codec, Audio signal processing, Digital signal processing, Speech coding



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