is transparent if the original and decoded signal are
indistinguishable to the human ear. The bit rate depends on
the
codec and the audio material. Some codecs (e.g.
AAC,
MP3) are optimized for transparent coding at a low data
distinguisable but pleasant reproduction at lower bit rates.
Typical data rates in
kbps for different codecs are:
MP1 288-320
MP2 224-256
MP3 160-224
MPEG-2 AAC 128-160
MPEG-4 AAC 112-144
MPEGplus 160-200
(2001-12-23)