2012 NISSAN ALTIMA Owners Manual

Troubleshooting guide:

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

Playback order:
Music playback order of a CD, DVD or USB
device with compressed audio files is as illus-
trated.● The folder names of folders not containing
compressed audio files are not shown in the
display.
● If there is a file in the top level of the
disc/USB, “Root Folder” is displayed.
● The playback order is the order in which the
files were written by the writing software, so
the files might not play in the desired order.

Specification chart:

Troubleshooting guide:

Compressed Video Files (models with
Navigation System)
Explanation of terms:● DivX – DivX refers to the DivX codec
owned by Div, Inc. used for a lossy compres-
sion of video based on MPEG-4.
● AVI – AVI stands for Audio Video Interleave.
It is standard file format originated by Micro-
soft Corporation. A .divx encoded file can be
saved into the .avi file format for playback on
this system if it meets the requirements
stated in the table in this section. However,
all .avi files are not playable on this system
since different encodings can be used other
than the DivX codec.
● ASF – ASF stands for Advanced Systems
Format. It is file format owned by Microsoft
Corporation. Note: Only .asf files that meet
the requirements stated in the table in this
section can be played.
● Bit rate — Bit rate denotes the number of
bits per second used by a digital video files.
The size and quality of a compressed digital
audio file is determined by the bit rate used
when encoding the file.
4-42Monitor, climate, audio, phone and voice recognition systems

Requirements for Supporting Video Playback:

1. SEEK/TRACK button
2. CD insert slot
3. TUNE/FF·REW button
4.