compression ratio NISSAN LEAF 2019 Owner´s Manual

•CDs that are in poor condition or are
dirty, scratched or covered with finger-
prints may not work properly.
•
The following CDs may not work properly.
– Copy Control Compact Discs (CCCD)
– Recordable Compact Discs (CD-R)
– Rewritable Compact Discs (CD-RW)
•
Do not use the following CDs as they may
cause the CD player to malfunction:
– 3.1 in (8 cm) discs with an adapter
– CDs that are not round
– CDs with a paper label
– CDs that are warped, scratched, or
have abnormal edges
• This audio system can only play prere-
corded CDs. It has no capability to re-
cord or burn CDs.
• If the CD cannot be played, one of the
following messages will be displayed.
CHECK DISC:
• Confirm that the CD is inserted correctly
(the label side is facing up, etc.).
•
Confirm that the CD is not bent or warped
and it is free of scratches.
PRESS EJECT:
This is an error due to excessive tem-
perature inside the player. Remove the
CD by pressing the EJECT button. Af ter a
short time, reinsert the CD. The CD can be
played when the temperature of the
player returns to normal.
UNPLAYABLE:
The file is unplayable in this audio system
(only MP3 or WMA (if so equipped) CD).
Compressed audio files
(MP3/WMA)
Terms
• MP3 — MP3 is short for Moving Pictures Experts Group Audio Layer 3. MP3 is the
most well-known compressed digital au-
dio file format. This format allows for near
“CD quality” sound, but at a fraction of the
size of normal audio files. MP3 conversion
of an audio track from CD-ROM can re-
duce the file size by approximately a
10:1 ratio with virtually no perceptible loss
in quality. MP3 compression removes the
redundant and irrelevant parts of a sound
signal that the human ear doesn’t hear. • WMA — Windows Media Audio (WMA)* is a
compressed audio format created by Mi-
crosof t as an alternative to MP3. The WMA
codec offers greater file compression
than the MP3 codec, enabling storage of
more digital audio tracks in the same
amount of space when compared to
MP3s at the same level of quality.
• Bit rate — Bit rate denotes the number of bits per second used by a digital music file.
The size and quality of a compressed digi-
tal audio file is determined by the bit rate
used when encoding the file.
• Sampling frequency — Sampling fre- quency is the rate at which the samples of
a signal are converted from analog to digi-
tal (A/D conversion) per second.
• Multisession — Multisession is one of the methods for writing data to media. Writing
data once to the media is called a single
session, and writing more than once is
called a multisession.
• ID3/WMA Tag — The ID3/WMA tag is the part of the encoded MP3 or WMA file that
contains information about the digital
music file such as song title, artist, encod-
ing bit rate, track time duration, etc. ID3 tag
information is displayed on the Artist/
song title line on the display.
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