The development
process of MP3 Players

MP3 Players, MP4
Players, MP5 Players, are
now everywhere. In a number of years ago, MP3 Players have emerged, and now
almost everyone has an MP3 Player, especially young people, they like music,
like to have the rhythm life, so they always used to bring MP3 player.

MP3 stands for
MPEG Audio Layer III and it is a standard for audio compression that makes any
music file smaller with little or no loss of sound quality. MP3 is part of
MPEG, an acronym for Motion Pictures Expert Group, a family of standards for
displaying video and audio using lossy compression. Standards set by the
Industry Standards Organization or ISO, beginning in 1992 with the MPEG-1 standard.
MPEG-1 is a video compression standard with low bandwidth. The high bandwidth
audio and video compression standard of MPEG-2 followed and was good enough to
use with DVD technology. MPEG Layer III or MP3 involves only audio compression.

Fraunhofer
Gesellschaft has this to say about MP3 Players: "Without
Data reduction, digital audio signals typically consist of 16 bit samples
recorded at a sampling rate more than twice the actual audio bandwidth. So you
end up with more than 1.400 Mbit to represent just one second of stereo music
in CD quality. By using MPEG audio coding, you may shrink down the original
sound data from a CD by a factor of 12, without losing sound quality."

In 1987: the
Fraunhofer Institut in Germany
began research code-named EUREKA
project EU147, Digital Audio Broadcasting (DAB).  January 1988 - Moving Picture Experts Group
or MPEG was established as a subcommittee of the International Standards
Organization/International Electrotechnical Commission or ISO/IEC. April 1989 -
Fraunhofer received a German patent for MP3. 1992 - Fraunhofer's and Dieter
Seitzer’s audio coding algorithm was integrated into MPEG-1. 1993 - MPEG-1
standard published. 1994 - MPEG-2 developed and published a year later.
November 26, 1996 - United
States patent issued for MP3. September 1998
- Fraunhofer started to enforce their patent rights. All developers of MP3
encoders or rippers and decoders/players now have to pay a licensing fee to
Fraunhofer. February 1999 - A record company called SubPop is the first to
distribute music tracks in the MP3 format. 1999 - Portable MP3 players appear.

With the
development of MP3 Players, MP4 Players,
MP5 Players is also emerging. In the MP3 Players on the basis of adding new
functionality, but also is very important, regardless of the number of
additional features, they are all MP3-based develop.

Internet
reference: http://inventors.about.com/od/mstartinventions/a/MPThree.htm

Editor: Rowlin