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CORE-A55/KAF-A55
Glossary
Term
Description
AAC
AAC stands for "Advanced Audio Coding" It is the audio compression method use
with the video compression of digital broadcasting, etc.
MP3
An audio compression method developed by Fraunhofer IIS, Germany. It achieves
a high compression rate by thinning out the data of the sound that is less audible
to human ears. It can compress music CD data into about 1/11 (128 kbps) while
maintaining similar audio quality.
USB
Standard for interfacing between the PC and peripheral devices. This system is
compatible with USB 1.1 and 2.0.
USB mass storage class
Standard for controlling a USB device from a PC. Also, refers to the action that a PC
recognizes a USB device connected to it as an external storage device.
VBR (Variable Bit Rate)
Technology for assigning the bits by varying their quantity according to the amount
of music information.
WMA
Stands for "Windows Media™ Audio". This is an audio compressed encoding system
developed by Microsoft Corporation.
Sampling frequency
Number of times analog signal is converted into digital signal per second. It is 44.1
kHz with music CD. In general, higher sampling frequencies offer higher audio
quality.
Tag data
Information written in audio file, including the title name, artist name, album name
and genre.
Bit rate
Figure expressing the amount of information per second. A higher bit rates offer
higher audio quality.
Message list
Displayed Message
Description
Reading
The system is reading the audio file information from the SD/USB audio source.
D-IN
−−−
The input signal is recorded with a sampling frequency other than 32k/44.1k/48k Hz.
D-IN
Unlock
No digital component is connected to the D-IN terminal.
D-IN
NonPCM
A signal other than PCM signal is input to the D-IN terminal.
No File
There is no audio file that can be played with this system.
B60-5784-00̲00̲English.indd 38
B60-5784-00̲00̲English.indd 38
08.9.16 11:39:27 AM
08.9.16 11:39:27 AM
