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MP3| Audio compression format that uses perceptual audio coding and psychoacoustic compression to strip inaudible and unnecessary information from sound signals. MP3 packs a minute of sound, at near CD quality, into about 1 megabyte. This makes delivering music directly over the Internet a viable prospect. MP3 is Layer 3 of the MPEG-2 video compression system developed by the Moving Pictures Expert Group (MPEG). |
| Despite its popularity, MP3 no longer has the best audio quality or highest compression ratio of perceptual encoding schemes. The two competitors are MP4, which is a proprietary format based on MPEG-2 ACC technology, and Microsoft's Windows Media Audio (WMA), which is capable of producing a similar sound quality to MP3, but with half the file size. |
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