MP3 and MP4 Full Form

MP3 is the abbreviated form of MPEG Audio Layer III and MP4 is the abbreviated form of MPEG-4 AVC, where MPEG stands for Moving Picture Experts Group and AVC stands for Advanced Video Coding.

MPEG Audio Layer 3 (MP3), is a patented encoding format for digital audio which uses a form of lossy data compression. It is a common audio format for consumer audio storage, as well as a de facto standard of digital audio compression for the transfer and playback of music on most digital audio players.

In other words, it is a programming format for digital audio which uses a form of loss data firmness, which signifies the original bits cannot be re-fabricated from the compressed bits. It can decrease the size of an audio file on the CD upto its 10th part.

The most communal bit rate for an MP3 file is around 256 kilobits per second, which is nearly one-sixth of the 1.4 megabits per second required by the compact disc (CD) format. In contrast to its reduced size, it still sounds like a realistic replica of the original audio to its listeners.

MPEG-4 Part 14 or MP4 is a digital multimedia container format most commonly used to store video and audio, but it can also be used to store other data such as subtitles and still images.

Portable media players are sometimes advertised as “MP4 Players”, although some are simply MP3 Players that also play AMV video or some other video format, and do not necessarily play the MPEG-4 Part 14 format.


Not well, it seems, because the MP3 has now died, according directly to the people who invented it. The Fraunhofer Institute for Integrated Circuits, which is part of the German research institution that funded MP3 development in the late 80s, announced late April, 2019 that its licensing for MP3-related patents has ended. Another audio format called Advanced Audio Coding, or AAC, is now the “de facto standard for music download and videos on mobile phones.” Bernhard Grill, who was involved in MP3 development said that AAC offers a lot more functionality than MP3.

Why is an MP3 file called an MP3 file?

MP3 is the acronym for MPEG Audio Layer III (3), which is the acronym for Moving Picture Experts Group which developed compression systems.

Compression systems are used for video data such as DVD movies and HDTV broadcasts.

The MP3 format is a compression system for music. It helps to reduce the number of byes in a song without reducing the quality of the sound. The goal of the MP3 format is to compress a CD-quality song by a factor of 10 to 14 without notably affecting the quality.

With MP3, a 32 Megabyte (MB) song on a CD is compressed to about 3 MB.

History of MP3

Fraunhofer-Gesellschaft, a German company, invented and developed MP3, and has licensed patents to the compression technology until its recent demise. The inventors listed in the patent were Bernhard Grill, Karl-Heinz Brandenburg, Thomas Sporer, Bernd Kurten, and Ernst Eberlein.

  • 1987 – The Fraunhofer Institut in Germany began researching high-quality low bit-rate audio coding. It was called the EUREKA project EU147, Digital Audio Broadcasting.
  • 1988 – The Moving Picture Experts Group, or MPEG, was established.
  • 1989 – Fraunhofer received a patent in Germany for MP3.
  • 1992 – Dieter Seitzer, who helped Fraunhofer with its research, integrated his audio coding with MPEG-1.
  • 1993 – The MPEG-1 standard was published.
  • 1994 – The MPEG-2 standard was developed and then published a year later.
  • Nov. 26, 1996 – The U.S. patent for MP3 was issued.
  • 1998 – Fraunhofer began enforcing patent rights. Whoever used the MP3 audio coding paid a licensing fee to Fraunhofer.
  • February 1999 – SubPop, a recording company, distributed music under the MP3 format, the first such company to do so.
  • 1999 – The first portable MP3 players appear.


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