compression ratio SUBARU BRZ 2016 1.G Navigation Manual

226 Audio and Visual
Audio Operations
About MP3/WMA
MP3 (MPEG Audio Layer 3) is a standard format for audio compression. By
using MP3, a file can be compressed to about 1/10 of the original size.
WMA ( Windows Media Audio) is Microsoft's audio compression technology.
WMA files can be compressed to a size even smaller than MP3 files.
This unit only supports certain MP3/WMA file standards, recorded media
and formats. Take note of the following when writing MP3/WMA files onto a
disc.
■About the supported MP3 file standards
•Supported standards:
MPEG1/2/2.5 Audio Layer 3
•Supported sampling frequencies (kHz):
-MP3 (MPEG1 Audio Layer 3): 32, 44.1, 48
-MP3 (MPEG2 Audio Layer 3): 16, 22.05, 24
-MP3 (MPEG2.5 Audio Layer 3): 8, 11.025, 12
•Supported bit rates (kbps):-MP3 (MPEG1 Audio Layer 3): 32, 40, 48, 56, 64, 80, 96, 112, 128, 160, 192, 224,
256, 320
-MP3 (MPEG2/2.5 Audio Layer 3): 8, 16, 24, 32, 40, 48, 56, 64, 80, 96, 112, 128,
144, 160
* Supports VBR ( Variable Bit Rate).
* Does not support Audio Layer 1/2.
* Emphasis supports only 50/15ms.
* Does not support free format.
* Does not support DRM (Digital Rights Management).
•Supported channel modes:
Stereo, Joint Stereo, Dual channels, Monaural
■About the supported WMA file standards
•Supported standards:
WMA Ver. 7 to 9
•Supported sampling frequencies (kHz):
22.05, 24, 32, 44.1, 48
•Supported bit rates (kbps):
-WMA Ver. 7, 8: 48, 64, 80, 96, 128, 160, 192
-WMA Ver. 9: 48, 63, 64, 80, 95, 96, 127, 128, 160, 191, 192, 256, 320
* Supports 2-channel play only.
* Supports VBR ( Variable Bit Rate).
* Does not support WMA9 Professional/Lossless/Voice.
* Does not support DRM (Digital Rights Management).
•Supported channel modes:
Stereo, Monaural
■About ID3/WMA tags
In MP3/WMA files, you can enter textual attribute information known as
ID3 tags/WMA tags to save information such as track titles and artist
names.
This unit supports ID3v.1.0, 1.1, 2.2, 2.3 and 2.4 tags. This unit supports
the ISO 8859-1, 2, 5 and 7 codes only. Use only the ISO 8859-1, 2, 5 or 7
codes to record tags. If characters not included in ISO 8859-1, 2, 5 or 7
codes are recorded, they may not be readably displayed.
This unit supports the WMA tag ASF revision (v1.20.02). WMA tags using
only Unicode are supported. Always use Unicode characters to enter
the information.
* When Ver. 1.x and Ver. 2.x of the ID3 tags both exist, precedence is given to
Ver. 2.x.