MP3 - MPEG-1 Audio Layer 3
What is MP3?
- MPEG-1 Audio Layer 3 is more commonly referred to as MP3, it is a common audio format for consumers’ audio storage, as well as a de facto standard of digital audio compression for the transfer and playback of music on digital audio players.
- MP3 file is created by using the setting of 128 kbit/s and will result in a file that is about 1/11th the size of the CD file which is created from the original audio source. It can also be constructed at higher or lower bit rates, with higher or lower resulting quality.
- MP3 is an audio-specific format designed by the Moving Picture Experts Group as part of its MPEG-1 standard. The group was formed by several teams of engineers at Fraunhofer IIS in Erlangen, Germany, AT&T-Bell Labs in Murray Hill, NJ, USA, Thomson-Brandt, and CCETT as well as others. It was approved as an ISO/IEC standard in 1991 and the use in MP3 of a lossy compression algorithm is designed to reduce the amount of data required to represent the audio recording.
- MP3 uses a complex, precise masking model that is much more signal dependent. The compression works by reducing accuracy of certain parts of sound. This method is commonly referred to as perceptual coding and it internally provides a representation of sound within a short-term time or frequency analysis window, by using psychoacoustic models to discard or reduce precision of components less audible to human hearing, and recording the remaining information in an efficient manner.
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