Compressed Audio Files (Mp3/Wma/Aac) - Bosch AIVIH61L2 Manual

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 di-
gital 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
Microsoft as an alternative to MP3. The
WMA codec offers greater file com-
pression 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.
. 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-
Condition:
mined by the bit rate used when
encoding the file.
. Sampling frequency — Sampling fre-
quency is the rate at which the sam-
ples 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 multises-
sion.
. 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.
. AAC — Advanced Audio Coding (AAC) is
a compressed audio format. AAC of-
fers greater file compression than MP3
and enables music file creation and
storage at the same quality as MP3.
[ Edit: 2019/ 9/ 13 Model: 2020MY AIVI ST3 OM_N20E-AV1NJU0_NAVIOM19-022 ]
(37,1)
3. Audio system
Playback order
. The folder names of folders not con-
taining compressed audio files are not
shown on the display.
. The playback order is the order in
which the files were written by the
writing software, so the files might not
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