2012 NISSAN ALTIMA compression ratio

CD, DVD or USB with Compressed
Audio Files (models with Navigation
System)
The file types supported by this system are MP3,
WMA, AAC/M4A and ATRAC3.
Explanation of 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 can reduce the file size by ap-
proximately 10:1 ratio (Sampling: 44.1 kHz,
Bit rate: 128 kbps) with virtually no percep-
tible loss in quality. The compression re-
duces certain parts of sound that seem in-
audible to most people.
● WMA — Windows Media Audio (WMA) is a
compressed audio format created by Micro-
soft 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. ●
AAC/M4A — Advanced Audio Coding
(AAC) is a lossy audio compression format.
Audio files that have been encoded with
AAC are generally smaller in size and deliver
a higher quality of sound than MP3.
● ATRAC3, ATRAC3 Plus — Adaptive Trans-
form Acoustic Coding (ATRAC) is a lossy
audio compression format developed by
Sony.
● Bit rate — Bit rate denotes the number of
bits per second used by a digital music file.
The size and quality of a compressed digital
audio file is determined by the bit rate used
when encoding the file.
● Sampling frequency — Sampling frequency
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, artist, album title,
encoding bit rate, track time duration, etc.
ID3 tag information is displayed on the
Album/Artist/Track title line on the display.
* Windows, Windows Media and Windows
Vista are registered trademarks or trademarks
of Microsoft Corporation in the United States of
America and/or other countries.
4-38Monitor, climate, audio, phone and voice recognition systems

●Angle Mark (DVD-VIDEO)
When this item is turned on, an angle mark
will be shown on the bottom of the screen if
the scene can be seen from a different angle.
● Menu Skip (DVD-VIDEO)
DVD menus are automatically configured
and the contents will be played directly
when the “Menu Skip” key is turned on. Note
that some discs may not be played directly
even if this item is turned on.
● CM Skip (DVD-VIDEO)
Select the “CM Skip” key to choose the
setting time for CM backward and forward
operations. Use the “+” or “-” key to choose
a setting time of 15, 30 or 60 seconds.
● DRC (DVD-VIDEO, DVD-VR)
DRC (Dynamic Range Compression) auto-
matically adjusts the soundtrack volume
level to maintain a more even sound to the
speakers.
● DVD Language (DVD-VIDEO, VIDEO CD)
Select the “DVD Language” key to open the
number entry screen. Input the number cor-
responding to the preferred language and
select the “OK” key. The DVD top menu
language will be changed to the one speci-
fied. ●
Display
Adjust the image quality of the screen by
selecting the preferred adjustment items.
● Audio
Choose the preferred language for the au-
dio.
● Subtitle (DVD-VIDEO, DVD-VR)
Choose the preferred language for the sub-
titles.
● Display Mode (DVD-VIDEO, VIDEO CD,
DVD-VR)
Choose from the “Full”, “Wide”, “Normal” or
“Cinema” mode.
● Title List (DVD-VR)
Choose the preferred title from the list.
● Play Mode
Choose the preferred play mode.
● PG/PL Mode (DVD-VR)
Choose from the “PG” or “PL” mode.
USB INTERFACE (models without
Navigation System) (if so equipped)
Connecting a device to the USB input
jack
The USB input jack is located in the center con-
sole. Open the protective cover
1on the USB
jack, then insert the USB device into the jack.
When a compatible storage device is plugged
into the jack, compatible audio files on the stor-
age device can be played through the vehicle’s
audio system.

●10 Key Search
Select the “10 Key Search” key to open the
number entry screen. Input the number you
want to search for and the specified file or
folder will be played.
● Display
Adjust the image quality of the screen.
● DRC
DRC (Dynamic Range Compression) auto-
matically adjusts the soundtrack volume
level to maintain a more even sound to the
speakers.
● Audio
Choose the preferred language of the audio.
● Subtitle
Choose the preferred language of the sub-
titles.
● Display Mode
Choose between the “Normal”, “Wide”,
“Cinema” or “Full” display modes.
iPod* PLAYER OPERATION
WITHOUT NAVIGATION SYSTEM (if
so equipped)
Connecting iPod
To connect an iPod to the vehicle so that the
iPod can be controlled with the audio system
controls and display screen, use the USB jack
located in the center console. Open the protec-
tive cover
1on the USB jack in the center
console. Then connect the iPod-specific end of
the cable to the iPod and the USB end of the
cable to the USB jack on the vehicle. If your iPod
supports charging via a USB connection, its bat- tery will be charged while connected to the ve-
hicle with the ignition switch in the ACC or ON
position.
While connected to the vehicle, the iPod
can
only be operated by the vehicle audio controls.
To disconnect the iPod from the vehicle, remove
the USB end of the cable from the USB jack on
the vehicle, then remove the cable from the
iPod.
*iPod is a trademark of Apple Inc., registered in
the U.S. and other countries.
Compatibility
The following models are compatible:
● iPod 5th Generation version 1.2.3
● iPod Classic - version 1.1
● iPod Touch - version 2.1*
● iPod Nano - 1st generation version 1.3.1
● iPod Nano - 2nd generation version 1.1.3
● iPod Nano - 3rd generation version 1.0.2
● iPod Nano - 4th generation version 1.0.4
● iPod Nano - 5th generation version 1.0.1
* Some features of this iPod may not be fully
functional.