1. How MP3 Music Files Work
● Algorithm of the MP3
● What is the MP3
● Download the MP3 File
● MP3 Files copyright protection
2. Algorithm of the MP3
● A band division filter and conversion to the
frequency domain data by MDCT
(transformation DCT).
● The adaptive bit allotment in a frequency
domain based on hearing psychology.
● The reversible compression of the bit stream
by the Huffman encoding.
3. What is MP3?
● Mp3 is abbreviation of
[Moving Picture
Experts Group Audio
Layer-3].
● It is one of the
compression voice file
formats for the digital
voice.
4. Download the MP3 File
● When you want to download, you visit web site
that is posted MP3 file or FTP download site.
● The file is converted to an MP3 format.
● You can download the file to your computer.
● You can play the downloaded file with a special
piece of software called an MP3 player.
5. MP3's copyright protection
●
MP3 files has no copyright information.
– Everyone can copy and play the MP3 files.
– There are the opinion that it is used for an illegal
distribution.
