Information about MP3 player

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Written by John Coleman on February 7, 2010 – 7:40 am -

MPEG-1 Audio Layer 3, more usually referred to as MP3, is a patented digital audio encoding structure using a form of lossy data compression. It is a common audio structure for consumer audio storage, as well a standard of digital audio compression for the transfer and playback of music on digital audio players.

MP3 is an audio-specific format that was designed by the Moving Picture Experts Group as part of its MPEG-1 standard. The group was formed by a few 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 accepted as an ISO/IEC standard in 1991.

The use in MP3 of a lossy compression algorithm is planned to significantly reduce the amount of data acquired to represent the audio recording and even now sound like a devoted copy of the original uncompressed audio for most listeners. An MP3 file that is made using the setting of 128 kbit/s will outcome in a file that is about 1/11the size of the CD file fashioned from the original audio resourse. An MP3 file can also be constructed at higher or lower bit rates, with higher or lower resulting quality.

The compression works by plummeting correctness of some parts of sound that are deemed away from the auditory resolution capability of most people. This method is commonly referred to as perceptual coding.[5] It internally provides a representation of sound within a short-term time/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.

This way is often presented as relatively conceptually parallel to the principles used by JPEG, an image compression format.The specific algorithms, however, are rather different: JPEG uses a built-in vision model that is very widely tuned, while MP3 uses a complex, precise masking model that is much more signal dependent.

Individually I always prefer to buy ipods form e-shops since online buying is very easier.

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