2011 INFINITI QX compression ratio

Compressed Audio Files (MP3/WMA/
AAC)
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
approximately a 10:1 ratio (Sampling: 44.1
kHz, Bit rate: 128 kbps) with virtually no
perceptible loss in quality. The compression
reduces certain parts of sound that seem
inaudible 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. ●
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 con-
tains information about the digital music file
such as song title, artist, album title, encod-
ing bit rate, track time duration, etc. ID3 tag
information is displayed on the
Album/Artist/Track title line on the display.
* Windows and Windows Media are regis-
tered trademarks or trademarks of Microsoft
Corporation in the United States of America
and/or other countries. Playback order :
●
The folder names of folders not containing
compressed audio files are not shown in the
display.
SAA2494
4-46Monitor, climate, audio, phone and voice recognition systems

DVD settings
Select the “Settings” key to adjust the following
settings.
Key (DVD-VIDEO, DVD-AUDIO) :
Keys for the DVD menu operation are displayed.
: Move the cursor to select a DVDmenu.
Enter: Enter the selected menu.
Move: Change the display location by moving the operation key.
Back: Return to the previous screen.
Hide: Hide the operation key.
Title Menu (DVD-VIDEO) :
Some menus specific to each disc will be
shown. For details, see the instructions on the
disc.
Title Search (DVD-VIDEO, DVD-VR) :
The scene with the specified title will be dis-
played each time the “+” side or “” side is
selected.
Group Search (DVD-AUDIO, VIDEO CD) :
A scene in the specified group will be displayed
each time the “+” side or “” side is selected.
10 Key Search (DVD-VIDEO, VIDEO-CD,CD-DA,
DVD-VR) :
Select the “10 Key Search” key to open the
number entry screen. Input the number to be
searched and select the “OK” key. The specified
Title/Chapter or Group/Track will be played.
Select No. (VIDEO-CD) :
Select the “Select No.” key to open the number
entry screen. Input the number to be searched
and select the “OK” key. The specified scene
will be played. Angle (DVD-VIDEO) :
If the DVD contains different angles (such as
moving images), the current image angle can be
switched to another one. Select the “Angle”
key. The angle will change each time the “+”
side or “” side is selected.
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. Choose the setting
time from 15, 30 or 60 seconds by selecting the
“+” side or “” side.
DRC (DVD-VIDEO, DVD-VR) :
DRC (Dynamic Range Compression) automati-
cally adjusts the soundtrack volume level to
maintain a more even sound to the speakers.
Example
SAA2498
4-60Monitor, climate, audio, phone and voice recognition systems

Skip (Previous chapter)
Select the “
” key to skip the chapter(s) of
the disc backward. The chapters will go back
the number of times the “
” key is se-
lected.
List :
Select the “List” key on the movie file operation
screen to display the file list.
Settings :
Select the “Settings” key to adjust the following
settings.
●Audio File Playback
Switch to the audio playback mode. This
item is displayed only when the USB
memory contains the audio files.
● Play Mode
Select the “Normal” or “1 Track Repeat” play
mode. ●
10 Key Search
Select the “10 Key Search” key to open the
number entry screen.
Input the number to be searched and select
the “OK” key.
The specified folder/file will be played.
● Display
To adjust the image quality of the screen,
select the preferred adjustment items.
● DRC
DRC (Dynamic Range Compression) auto-
matically adjusts the soundtrack volume
level to maintain a more even sound to the
speakers.
● Audio
Select the preferred language for audio.
● Subtitle
Select the preferred language for subtitle.
● Display Mode
Select the “Normal”, “Wide”, “Cinema” or
“Full” mode.
Example
SAA2504
Monitor, climate, audio, phone and voice recognition systems4-65

Title Search (DVD-VIDEO) :
A scene that belongs to a specified title will be
displayed each time the “+” side or “” side is
selected.
10 Key Search (DVD-VIDEO, VIDEO-CD, CD-DA) :
Select the “10 Key Search” key and push the
ENTER button to open the number entry screen.
Input the number you want to search for and
select the “OK” key with the INFINITI controller.
Then push the ENTER button. The specified
Title/Chapter or Group/Track will be played.
Angle (DVD-VIDEO) :
If the DVD contains different angles (such as
moving images), the current image angle can be
switched to another one.
Select the “Angle” key and push the ENTER
button. When the “+” side or “” side is
selected, the angle will change.
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) :
The amount of seconds for CM Skip can be set
to 15, 30 or 60 seconds.
DRC (DVD-VIDEO) :
DRC (Dynamic Range Compression) allows tun-
ing of the dynamic range of sound recorded in
the Dolby Digital format.
DVD Language (DVD-VIDEO, VIDEO-CD) :
Select the “DVD Language” key and push the
ENTER button to open the number entry screen.
Input the number corresponding to the pre-
ferred language and select the “OK” key with
the INFINITI controller. Then push the ENTER
button. The DVD top menu language will be
changed to the one selected.
Display :
Adjust the image quality of the screen, select
the preferred adjustment items and push the
ENTER button.Audio :
Choose the preferred language using the
INFINITI controller and push the ENTER button.
Subtitle (DVD-VIDEO) :
Choose the preferred language using the
INFINITI controller and push the ENTER button.
To turn off the subtitles, push and hold the
ENTER button until a beep sounds.
Display Mode (DVD-VIDEO, VIDEO-CD) :
Choose from the “Full”, “Wide”, “Normal” or
“Cinema” mode using the INFINITI controller
and push the ENTER button again.
Play Mode :
Choose the preferred play mode using the
INFINITI controller and push the ENTER button.
Remote controller operation
Use the remote controller to adjust the follow-
ing items.
Rear display ON/OFF :
The rear displays can be activated or deacti-
vated individually.
To activate or deactivate the rear displays, push
the preferred side (L or R) of the “ON·OFF”
button on the remote controller.
4-92Monitor, climate, audio, phone and voice recognition systems