MP3 Basics
Goal: To compress files as much as possible while retaining the same perceived audio quality as the original signal.
Uses lossy audio coding, also known as perceptive coding, to take advantage of the imperfections in human perception.
Very popular form of compression for music, especially downloading over the internet, and playing on MP3 players, such as IPODs.
Other forms of compression, such as WAV, AAC, WMA, and OGG are also popular.
Perceptive Coding
There is much more information in a signal than the human ear and mind process. This extra information is eliminated to make gains in compression.
A detailed model of human perception must be developed so only the extra information is eliminated.
