2014 INFINITI QX50 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 approxi-
mately 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
Microsoft as an alternative to MP3. The
WMA codec offers greater file compres-
sion 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 deter-
mined 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,
artist, album title, encoding bit rate,
track time duration, etc. ID3 tag in-
formation is displayed on the Album/
Artist/Track title line on the display.
* Windows
®and Windows Media®are
registered trademarks or trademarks of
Microsoft Corporation in the United States of America and/or other countries.
Monitor, climate, audio, phone and voice recognition systems4-59

4-64Monitor, climate, audio, phone and voice recognition systems
Compressed Video Files (models
with navigation system)
Explanation of terms:
.DivX®- DivX®refers to the DivX®codec
owned by DivX, Inc. used for a lossy
compression of video based on MPEG-
4.
. AVI - AVI stands for Audio Video
Interleave. It is a standard file format
originated by Microsoft 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, not all the “.avi”files are
playable on this system since different
encodings can be used than the DivX
®
codec.
. ASF - ASF stands for Advanced Systems
Format. It is a 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 file. The size and quality of a
compressed digital audio file is deter- mined by the bit rate used when
encoding the file.

4-74Monitor, climate, audio, phone and voice recognition systems
SAA2498
Example
DVD settings
Select the“Settings”key to adjust the
following settings.
Key (DVD-VIDEO):
Keys for the DVD menu operation are
displayed.
: Move the cursor to select a DVD
menu.
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
displayed each time the “+”side or “−”
side is selected.
Group Search (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) auto-
matically adjusts the soundtrack volume
level to maintain a more even sound to the
speakers.

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
selected.
List:
Select the “List”key on the movie file
operation screen to display the file list.
SAA2504
Example
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 Re-
peat” 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)
automatically 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 sub-
title.
. Display Mode
Select the “Normal”,“Wide”,“Cinema”
or “Full” mode.
Monitor, climate, audio, phone and voice recognition systems4-79