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<p><b>New page</b></p><div>[[File:Mp3filestructure.svg|Mp3filestructure|thumb]] '''MP3''' is an [[audio coding format]] for digital audio. Originally defined as the third audio format of the [[MPEG-1]] standard, it was retained and further extended—defining additional bit rates and support for more audio channels—as the third audio format of the subsequent [[MPEG-2]] standard. A third version, known as [[MPEG 2.5]]—extended to better support lower bit rates—is commonly implemented, but is not a recognized standard.<br />
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MP3 files are marked by the file extension ".mp3" and primarily gained fame due to their small file size and portability, making them an ideal format for storing and transferring music on digital audio players, computers, and the internet during the late 1990s and early 2000s. The MP3 format uses a form of [[lossy data compression]] to reduce file sizes by cutting out sounds that are either inaudible or less important, allowing for a more efficient storage of audio data without significantly impacting the perceived quality of the sound for most listeners.<br />
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==History==<br />
The development of the MP3 format is attributed to a team of engineers from [[Germany]] under the leadership of [[Karlheinz Brandenburg]] at the [[Fraunhofer Society]] in the late 1980s. The project aimed to create a digital audio encoding format that could compress audio files with minimal loss of sound quality. The MP3 standard was finalized in 1991 and became widely adopted by consumers worldwide, especially with the proliferation of Internet use and digital media players.<br />
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==Technical Details==<br />
MP3 files utilize the [[MPEG Audio Layer III]] compression to reduce the file sizes of audio tracks. The compression works by analyzing the audio signal and then reducing the precision of certain parts of sound that are considered to be beyond the auditory resolution of most people, known as [[psychoacoustic]] masking. This allows the files to be significantly smaller than uncompressed audio formats like [[WAV]] or [[AIFF]], while retaining a sound quality that is very close to the original uncompressed audio for most listeners.<br />
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==Usage==<br />
The popularity of MP3s grew rapidly with the advent of [[Napster]], a file-sharing service that made it easy to download music files, and the development of portable MP3 players. This format became synonymous with digital audio, transforming the music industry by making it easy to distribute, share, and store music digitally with little to no physical media.<br />
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==Legal and Copyright Issues==<br />
The widespread use of MP3s led to significant legal and copyright controversies, particularly in the music industry. Artists and record labels faced challenges with copyright infringement as music was shared on the internet without permission. Legal battles and the development of digital rights management (DRM) technologies were some of the responses to these challenges.<br />
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==Legacy==<br />
Despite the emergence of more advanced audio coding formats like [[AAC]] and [[Ogg Vorbis]], MP3 remains a widely used and influential format due to its early entry into the digital audio space and the vast libraries of music that exist in MP3 format. Its development marked a significant moment in the history of digital media, influencing how music is consumed and distributed.<br />
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[[Category:Audio codecs]]<br />
[[Category:MPEG]]<br />
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