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Terms
Packet write
This is a general term for a method
of writing on CD-R, etc. at the time
required for a file, just as is done
with files on floppy or hard discs.
Bit rate
This expresses data volume per
second, or bps (bits per second)
units. The higher the rate, the more
information is available to reproduce
the sound. Using the same encoding
method (such as MP3), the higher
the rate, the better the sound.
Multi-session
Multi-session is a recording method
that allows additional data to be
recorded later. When recording
data on a CD-ROM, CD-R or CD-
RW, etc., all data from beginning
to end is treated as a single unit or
session. Multi-session is a method
of recording more than 2 sessions in
one disc.
CD-DA
CD-DA is an abbreviation of Compact
Disc Digital Audio. It refers to the
uncompressed format of regular
CDs.
ID3 Tag
This is a method of embedding track-
related information in a MP3 file. This
embedded information can include
the track title, the artist's name, the
album title, the music genre, the
year of production, comments and
other data. The contents can be
freely edited using software with ID3
Tag editing functions. Although the
tags are restricted to the number of
characters, the information can be
viewed when the track is played back.
ISO9660 format
This is the international standard for the
format logic of CD-ROM folders and
files. For the ISO9660 format, there are
regulations for the following two levels.
Level 1:
The file name is in 8.3 format (the name
consists of up to 8 characters, half-byte
English capital letters and half-byte
numerals and the "_" sign, with a file-
extension of three characters).
Level 2:
The file name can have up to 31
characters (including the separation
mark "." and a file extension).
Each folder contains less than 8
hierarchies.
Extended formats
Joliet:
File names can have up to 64 characters.
Romeo:
File names can have up to 128 characters.
m3u
Playlists created using the
"WINAMP" software have a playlist
file extension (.m3u).
MP3
MP3 is short for MPEG1 & 2 Audio
Layer3. It is an audio compression
standard set by a working group
(MPEG) of the ISO (International
Standards Organization). MP3 is able
to compress audio data to about 1/10
the level of a conventional disc.
WMA
WMA is short for Windows Media
TM
Audio and refers to an audio
compression technology that is
developed by Microsoft Corporation.
WMA data can be encoded by using
Windows Media Player version 7 or
later.
AAC
AAC is short for Advanced Audio
Coding and refers to an audio
compression technology standard
used with MPEG2 and MPEG4.