Sony Walkman MZ-N710 Operating Instructions Manual page 113

Recording mode (Bit rate)
This is a measure of data volume per second. The rate is expressed in bps (bits per second).
In SonicStage, the bit rate can be selected for recording an audio CD or converting MP3
and WAV format audio files into ATRAC3 format from among three rates: 132 kbps, 105
kbps or 66 kbps. In the case of 105 kbps, 105,000 bits of information is processed per
second. If the bit rate is large, that means a large amount of information is used to play the
music. Thus, 105 kbps data produces better sound quality than 66 kbps data, and 132 kbps
data provides better sound quality than 105 kbps data. However, audio files in formats such
as MP3 have different encoding methods, and so the sound quality is not determined by the
bit rate alone.
SDMI
SDMI, which stands for Secure Digital Music Initiative, is a forum that consists of over
130 companies in the fields of recorded audio content, computers, and consumer
electronics. It is dedicated to the development of integrated copyright protection
technology that can be used worldwide.
SDMI is working to create a framework for preventing the improper usage of audio files
and to promote legal music distribution services. The copyright protection technology
OpenMG is based on the SDMI standard.
Windows Media Audio
This is an audio compression technology that includes the management system called
"Windows Media Rights Manager".
Windows Media Technology
This is a technology that includes a contents management system called Windows Media
Rights Manager which encrypts contents and distributes music contents along with their
conditions for usage, distribution, etc. Audio files supporting Windows Media
Technologies (WMT) downloaded via EMD* can be imported into and managed by
OpenMG Jukebox.
* EMD may not be available in certain areas of the world.
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