Thursday, June 11, 2009

What is MP3?

MPEG-1 Audio Layer 3, better known as MP3, is a patented digital audio encoding format using a form of lossy compression. It is a common audio format for audio storage, as well as a de facto standard for digital audio compression for transmission and playback of music on digital audio players. MP3 is an audio format, from the Moving Picture Experts Group. 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 and others. He was as ISO / IEC standard in 1991.

The use of MP3 is a lossy compression algorithm to reduce the amount of data needed to make the audio recording and still like a faithful reproduction of the original uncompressed audio to most listeners. An MP3 file that starts with the mid-range bitrate setting of 128 kbit / s in a file that is normally 1:10 on the size of the CD file from the original audio source. An MP3 file can also be constructed at higher or lower bitrates, with higher or lower resulting quality. The compression works by correctness of certain parts of the economy, as the auditory resolution ability of most people. This method is commonly referred to as perceptual coding. [1] It is an internal representation of sound within a short time / frequency analysis window, psycho acoustic models to discard or reduce precision of components less audible to human hearing, and the inclusion of other information in an efficient manner. This corresponds roughly to the principles adopted by JPEG, an image compression format.

No comments:

Post a Comment