compression ratio NISSAN VERSA SEDAN 2018 Owner´s Manual

CHECK DISC:
∙Confirm that the CD is inserted cor-
rectly (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 tem-
perature of the player returns to nor-
mal.
UNPLAYABLE:
The file is unplayable in this audio
system (only MP3 or WMA (if so
equipped) CD).Compact disc with MP3 or WMA
Terms
∙ MP3 — MP3 is short for Moving Pictures
Experts Group Audio Layer 3. MP3 is the
most well-known compressed digital
audio 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 reduce the file size by approxi-
mately a 10:1 ratio with virtually no per-
ceptible 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
Microsof t as an alternative to MP3. The
WMA codec offers greater file compres-
sion than the MP3 codec, enabling stor-
age of more digital audio tracks in the
same amount of space when com-
pared to MP3s at the same level of qual-
ity.∙ Bit rate — Bit rate denotes the number
of bits per second used by a digital mu-
sic file. The size and quality of a com-
pressed digital 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
digital (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, art-
ist, encoding bit rate, track time dura-
tion, etc. ID3 tag information is displayed
on the Artist/song title line on the dis-
play.
* Windows® and Windows Media® are reg-
istered trademarks and trademarks in the
United States of America and other coun-
tries of Microsof t Corporation of the USA.
Display screen, heater, air conditioner, audio and phone systems4-19

Fade and drif t: As your vehicle moves away
from a station transmitter, the signals will
tend to fade and/or drif t.
Static and flutter: During signal interfer-
ence from buildings, large hills or due to
antenna position (usually in conjunction
with increased distance from the station
transmitter), static or flutter can be heard.
This can be reduced by adjusting the treble
control to reduce treble response.
Multipath reception: Because of the reflec-
tive characteristics of FM signals, direct and
reflected signals reach the receiver at the
same time. The signals may cancel each
other, resulting in momentary flutter or loss
of sound.
AM RADIO RECEPTION
AM signals, because of their low frequency,
can bend around objects and skip along
the ground. In addition, the signals can be
bounced off the ionosphere and bent back
to earth. Because of these characteristics,
AM signals are also subject to interference
as they travel from transmitter to receiver.Fading: Occurs while the vehicle is passing
through freeway underpasses or in areas
with many tall buildings. It can also occur
for several seconds during ionospheric tur-
bulence even in areas where no obstacles
exist.
Static: Caused by thunderstorms, electrical
power lines, electric signs and even traffic
lights.
AUDIO OPERATION PRECAUTIONS
MP3 or WMA terms
∙ MP3 — MP3 is short for Moving Pictures
Experts Group Audio Layer 3. MP3 is the
most well-known compressed digital
audio 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 reduce the file size by approxi-
mately a 10:1 ratio with virtually no per-
ceptible 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
Microsof t as an alternative to MP3. The
WMA codec offers greater file compres-
sion than the MP3 codec, enabling stor-
age of more digital audio tracks in the
same amount of space when com-
pared to MP3s at the same level of qual-
ity.
∙ Bit rate — Bit rate denotes the number of bits per second used by a digital mu-
sic file. The size and quality of a com-
pressed digital 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
digital (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.
4-24Display screen, heater, air conditioner, audio and phone systems