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10-14
Interior equipment and accessories
Bit rate
Sampling frequency
Format
Maximum number of layers of directory
Maximum number of folders
Maximum number of files
•
MP3/WMA files
•
MP3 (MPEG1/2 Audio Layer III) is a standard
coding format for digital audio data compres-
sion.
•
WMA (Windows Media
format for digital audio data compression devel-
oped by Microsoft Corporation.
NOTE:
•
Windows is a registered trademark of Microsoft
Corporation in the United States and other coun-
tries.
•
Windows Media is either a registered trademark
or trademark of Microsoft Corporation in the
United States and/or other countries.
•
File specifications
MPA: 8 – 320 kbps
WMA: 64 – 161 kbps
MPEG-1 LAYER2/3: 32, 48, 44.1 (kHz)
MPEG-2 LAYER2/3: 16, 22.05, 24 (kHz)
MPEG-2.5 LAYER3: 8, 141.025, 12 (kHz)
ISO/IEC 11172-3.13818-3
8
200
512
•
This audio system recognizes files as MP3/
WMA files and reproduces them only if their file
names have the extension ".mp3" or ".wma" rep-
resenting MP3 or WMA.
•
The system supports VBR (variable bit rate)
encoded audio files.
•
The system supports multi-session files. How-
ever, it will not reproduce any session that is not
closed.
NOTE:
•
Bit rate is the amount of data (number of bits)
processed per second. Variable bit rate (VBR) is
a method in which the bit rate is varied during
the data encoding process.
•
Sampling frequency refers to the number of
times that analog signals are converted into dig-
ital signals (AD conversion) in one second.
•
Multisession is a writing format applicable to
recordable CDs (such as CD-R). Closing means
the process to record a session closing state-
ment at the end of writing.
®
Audio) is the coding
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