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MP3 (MPEG Audio Layer-3)
This is an internationally standardized audio data
compression scheme, using the “MPEG-1” video
compression standard. It compresses the data volume to
about one eleventh its original size while maintaining sound
quality equivalent to a music CD.
WMA (Windows Media Audio)
This is audio compression technology developed by
Microsoft Corporation.
WMA data can be encoded using Windows Media
®
Player.
To encode WMA files, only use applications authorized by
Microsoft Corporation. If you use an unauthorized application,
the file may not work properly.
Sampling frequency
Sampling involves taking a reading of a sound wave (analog
signal) at regular intervals and expressing the height of the
wave at each reading in digitized format (producing a digital
signal).
The number of readings taken in one second is called the
“sampling frequency”. The larger the value, the closer the
reproduced sound is to the original.
Dynamic range
The difference between the maximum undistorted sound
level and the minimum discernible level above the noise
emitted by the device.
Bit rate
This is the amount of audio data recorded on a disc that is
read in one second.
Finalizing
This process enables DVD/CD recorded with a recorder to be
played by other players.
Linear PCM
This is an uncompressed PCM (Pulse Code Modulation)
signal. Unlike lossy compression audio sources such as
MP3, no audio quality or dynamic range deteriorates.
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