MP3

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{|
 
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|[[File Formats]]
 
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|[[Electronic File Formats]]
 
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|[[Audio]]
 
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|[[MP3]]
 
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{{FormatInfo
 
{{FormatInfo
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|formattype=electronic
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|subcat=Audio and Music
 
|extensions={{ext|mp3}}
 
|extensions={{ext|mp3}}
 
|mimetypes={{mimetype|audio/mpeg}}
 
|mimetypes={{mimetype|audio/mpeg}}
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|locfdd={{LoCFDD|fdd000012}}, {{LoCFDD|fdd000105}}
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|pronom={{PRONOM|fmt/134}}
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|wikidata={{wikidata|Q42591}}
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|released=1993
 
}}
 
}}
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'''MP3''' is the name commonly given to the audio formats specified by [[MPEG-1]] Layer III and [[MPEG-2]] Layer III, standardized as ISO/IEC 11172-3:1993, with some additions in ISO/IEC 13818-3:1995. It uses lossy compressed data.
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MP3 is based in part on work by the Fraunhofer Institute, which held patents in the format. Other companies may also have held patents encumbering its implementation. One of the relevant patents was [http://www.google.com/patents/US5812672 U.S. Patent 5,812,672], which expired in September 2015; many other related patents in various countries expired earlier. The final expiration of all relevant patents took until 2017, however, due to some "submarine patents" which were kept in the application process for years, extending their expiration dates. A modified version of [[DCT compression]] (Discrete cosine transform) is used, a lossy compression method also used in [[JPEG]] images.
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[[ID3]] tags are often used to provide metadata in MP3 files, though they aren't part of the MP3 specification.
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== Specifications ==
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* [https://www.iso.org/standard/22412.html ISO/IEC 11172-3:1993] (not free to download)
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* [https://www.iso.org/standard/26797.html ISO/IEC 13818-3:1998] (not free to download)
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* RFC 3003: The audio/mpeg Media Type
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* RFC 5219: A More Loss-Tolerant RTP Payload Format for MP3 Audio
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* http://mpgedit.org/mpgedit/mpeg_format/mpeghdr.htm
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* http://mpgedit.org/mpgedit/mpeg_format/MP3Format.html
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== Software ==
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* [[Konvertor]]
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* [http://mpesch3.de1.cc/ MP3DirectCut] -- MP3 editor
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* [http://lame.sourceforge.net/ LAME MP3 encoder: open-source]
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* [http://www.rarewares.org/mp3-lame-libraries.php LAME compiled libraries] - needed for various software to let it import/export/use MP3s
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* [[MP3Stego]] - Hide information in MP3 files
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* [[Wrapster]] - Convert any file into a valid MP3 file to bypass restrictions that only allow audio files
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==See also==
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* [[APE tag]]
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* [[ID3]]
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* [[MPEG-1]]
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* [[MPEG-2]]
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* [[MPEG Elementary Stream]]
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* [[MP1]], [[MP2]]
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* [[packMP3]]
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* [[MP3 wrapper]]
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* [[mp3PRO]]
  
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'''MP3''' is the name commonly given to the audio formats specified by MPEG-1 Layer III and MPEG-2 Layer III, standardized as ISO/IEC 11172-3:1993. It uses lossy compressed data. It is based in part on work by the Fraunhofer Institute, which still holds patents in the format. Other companies may also hold patents encumbering its implementation.
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== Sample files ==
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* {{DexvertSamples|audio/mp3}}
  
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ID3 tags are often used to provide metdata in MP3 files, though they aren't part of the MP3 specification. ID3 V1 defines a fixed-length data block that is always placed at the end of the file. ID3 V2, which has very little in common with V1, defines a block with variable-length frames and allows more flexibility and verbosity.
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== Other links ==
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* [[Wikipedia:MP3|MP3 (Wikipedia)]]
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* [http://www.tonedeaf.com.au/news/international-news/306773/3d-print-mp3-vinyl-record.htm Now You Can 3D Print Any MP3 Into A Vinyl Record]
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* [https://gist.github.com/warewolf/7e584b96efc6e2e799b3 Diff of 2 copies of an Amazon MP3 download showing how they have different hashes, apparently a DRM measure to uniquely identify a copy]
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* [http://ryanmaguiremusic.com/theghostinthemp3.html The Ghost in the MP3]
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* [https://fileformats.wordpress.com/2015/03/30/honda/ Honda MP3 player defect]
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* [http://www.npr.org/sections/therecord/2017/05/11/527829909/the-mp3-is-officially-dead-according-to-its-creators The MP3 Is Officially Dead, According To Its Creators] ''[Ed. note: This article title may be [https://marco.org/2017/05/15/mp3-isnt-dead misleading].]''
  
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== References ==
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[[Category:MPEG]]
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* [http://en.wikipedia.org/wiki/MP3 MP3 (Wikipedia)]
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Latest revision as of 15:32, 28 December 2023

File Format
Name MP3
Ontology
Extension(s) .mp3
MIME Type(s) audio/mpeg
LoCFDD fdd000012, fdd000105
PRONOM fmt/134
Wikidata ID Q42591
Released 1993

MP3 is the name commonly given to the audio formats specified by MPEG-1 Layer III and MPEG-2 Layer III, standardized as ISO/IEC 11172-3:1993, with some additions in ISO/IEC 13818-3:1995. It uses lossy compressed data.

MP3 is based in part on work by the Fraunhofer Institute, which held patents in the format. Other companies may also have held patents encumbering its implementation. One of the relevant patents was U.S. Patent 5,812,672, which expired in September 2015; many other related patents in various countries expired earlier. The final expiration of all relevant patents took until 2017, however, due to some "submarine patents" which were kept in the application process for years, extending their expiration dates. A modified version of DCT compression (Discrete cosine transform) is used, a lossy compression method also used in JPEG images.

ID3 tags are often used to provide metadata in MP3 files, though they aren't part of the MP3 specification.

Contents

[edit] Specifications

[edit] Software

[edit] See also

[edit] Sample files

[edit] Other links

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