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MP4 player
The name MP4 player is a marketing term for inexpensive portable media players, usually from little known or generic device manufacturers.〔(【引用サイトリンク】title=MP3≠MP4！区别和认识MP3与MP4的不同！ )〕 The name itself is a misnomer, since most MP4 players through 2007 were incompatible with the MPEG-4 Part 14 or the ''.mp4'' container format. Instead, the term refers to their ability to play more file types than just MP3. In this sense, in some markets like Brazil, any new function added to a given media player is followed by an increase in the number, for example an MP5 or MP12 Player,〔http://lista.mercadolivre.com.br/mp12 retrieved Nov. 22 2009.〕 despite there being no corresponding MPEG-5 standard (, the current standard, still being developed, is MPEG-4).
The Archos Jukebox Multimedia was the first commercial portable media player, and was the first to be coined as an MP4 player is a mp4 video.〔(【引用サイトリンク】title="MP4教父" 爱可视全球总裁访华力拓中国市场 )〕〔(【引用サイトリンク】title=爱可视VS苹果：从MP3到MP4 )〕
== General features ==
Today's MP4 Players can play video in a multitude of video formats without the need to pre-convert them or downsize them prior to playing them. Some MP4 Players possess USB ports in order for the users to connect it to a PC. Some models also have memory cards to expand the memory of the player instead of storing files in the built-in memory.
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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