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Glossary
ATRAC3
ATRAC3, which stands lbr Adaptive 'lYanstk}rm Acoustic Coding3, is audio compression
technology that satisfies 1he demand for high sound qualgy and high compression rates.
The NI'RAC3 compression rate is approximalely 10 times higher 1hart 1hat of the Audio
CD, resulting an increased data capacity lbr the media.
"Check-in/Check-Out"
Check-out is to transfer music files from a personal computer to an external device/media
(such as a Nelwork Walkman). Returning checked-out music files 1o the same computer is
to check in. (You cannot move checked-out music files to another computer.)
You can check out a music file, check it back in, and then check it out again an infinite
number of times. The SDMI rules provide that up to lbur copies of a music file can be
checked out at one time. OpenMG employs a melhod whereby lhree copies of a song can
be checked out simultaneously, while the fourth copy is maintained as a master on your PC.
Electronic Music Distribution (EMD) service
EMD is a websile that distributes music files which are available lbr purchase.
MP3
MP3, which stands tbr MPEG-I Audio Layer3, is a standard fbr audio file compression
determined by the Motion Picture Experts Group, an ISO (ln*ernational Organization lbr
Standardization) working group. It enables compression of audio files to about 1/10 of the
data size of a standard compact disc. Since the MP3 encoding algorithm is disclosed, there
are various encoders/decoders that are compliant with this standard, including freeware that
is available for no charge. The MP3 standard is therefore widely used in the computer field.
Music Drive
Music Drive is a music database lbr managing audio data on a computer, in Music Drive,
audio files can be managed along with such inlbrmation as artist names, track names, and
CD jacket images, or can be combined and categorized in different playlists.
OpenMG
Copyright protection technology for the import and mm_agement of musical content from
distribution services or CDs. By using software that are compliant with OpenMG, audio
contents can be encrypled before slorage on a hard disk drive to allow playback of those
audio files on that compuler. OpenMG also prevenls the unauthorized distribution of the
contents via the lnternet or olher networks.
Playlist
A playlist is like a container thal can be used 1o hold and calegorize files slored in Music
Drive. For example, by making a "jazz" playlist and then putting your favorile jazz tracks
into the playlist, you can play all of the tracks repeatedly or check 1hem all out at the same
time.
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