14
A
P
E
X
D
I
G
I
T
A
L
AD-660
What is MP3 and VCD?
WHAT IS MP3?
MP3 is a compression form (like zip). The name MP3 stand for Mpeg1 Audio layer 3 and its compression
algorithm is based on a complicated psycho-acoustic model. This model is based on the fact that the human
ear can not hear all the audio frequencies. The human hearing range is between 20Hz to 20khz and it is
most sensitive between 2 to 4 kHz. As a result the MP3 compression form is destructive, that means the
compression algorithm causes the file to lose some information so that it can not be restored to its original
content.
When compressing an audio file (encoding) using the MP3 algorithm you can set the desired encoding level
and have any compression level you want. The larger the compressed file the better the audio quality of the
result. The majority of the files available on the internet are encoded in 128 kbits stereo 44kHz which results
in a high quality file that is 12 times smaller than the original! This, of course, has many
interesting consequences.
PLAYING IN MP3 FORMAT
You can play an MP3 CD by different “PLAY MODE” such as:
- “FOLDER”
(normal playback)
- “FOLDER R” (repeat playback on a specific folder)
- “REP-ONE”
(repeat playback on a song)
- “SINGLE”
(playback a song only one time)
- “SHUFFLE” (random playback)
1. Insert an MP3 CD, the DVD video player will initialize the disc and the directory (folder) will be shown
on the TV screen.
ROOT
0
BBBBBBBBBBB
1
CCCCCCCCCCC
2
DDDDDDDDDDD
3
EEEEEEEEEEE
4
FFFFFFFFFFF
5
..
0
SSSSSSSSSSS
1
TTTTTTTTTTT
2
VVVVVVVVVVV
3
ZZZZZZZZZZZ
4
UUUUUUUUUUU
5
MP3
MP3
PLAY MODE:
FOLDER
MP3 MENU
