Human ear
The technique is realized by perceptual coding techniques addressing the
perception of sound waves by the human ear. (Why have a music frequency that
you wont hear) By exploiting stereo effects and limiting the bandwidth, the
coding may achieve an acceptable sound quality at even lower bit rates.
MPEG Layer-3 is the most powerful member of the MPEG audio coding family.
For a given sound quality level, it requires the lowest bit rate or for a
given bit rate, it achieves the highest sound quality. What it means to you
If you look at the size of a typical CD audio track you will see its about
45Mb, however the same track compressed into MP3 would be shrank right down
to a few Megabytes, typically 3Mb. This means you could have several albums
on one MP3 disk. Portable MP3 players.
MP3 players have internal memory cards, just like digital cameras, although
the players might have a small amount of available memory, they can store a
large amount of MP3 audio tracks.
