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| Name | MP3 | MP4 |
| Full name | MP3 - MPEG-1 or MPEG-2 Audio Layer III | MP4 - MPEG-4 Part 14 |
| File extension | .mp3 | .mp4, .m4a, .m4p, .m4b, .m4r, .m4v |
| MIME type | audio/mpeg, audio/MPA, audio/mpa-robust | video/mp4 |
| Developed by | Fraunhofer Institute | International Organization for Standardization |
| Type of format | Digital audio | Media container |
| Description | MPEG-1 or MPEG-2 Audio Layer III, more commonly referred to as MP3, is an audio coding format for digital audio which uses a form of lossy data compression. It is a common audio format for consumer audio streaming or storage, as well as a de facto standard of digital audio compression for the transfer and playback of music on most digital audio players. | MPEG-4 Part 14 or MP4 is a digital multimedia format most commonly used to store video and audio, but can also be used to store other data such as subtitles and still images. Like most modern container formats, it allows streaming over the Internet.MPEG-4 Part 14 or MP4 is a digital multimedia format most commonly used to store video and audio, but can also be used to store other data such as subtitles and still images. Like most modern container formats, it allows streaming over the Internet. |
| Technical details | The use of lossy compression is designed to greatly reduce the amount of data required to represent the audio recording and still sound like a faithful reproduction of the original uncompressed audio. An MP3 file that is created using the setting of 128 kbit/s will result in a file that is about 1/11 the size of the CD file created from the original audio source. | Most kinds of data can be embedded in MPEG-4 Part 14 files through private streams. A separate hint track is used to include streaming information in the file. The registered codecs for MPEG-4 Part 12-based files are published on the website of MP4 Registration authority (mp4ra.org). |
| Associated programs | VLC media player, MPlayer, Winamp, foobar2000. | Windows Media Player, RealPlayer, MPlayer, Media Player Classic, VLC Media Player, K-Multimedia Player |
| Wiki | https://en.wikipedia.org/wiki/MP3 | https://en.wikipedia.org/wiki/MPEG-4_Part_14 |