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PLAYING AUDIO/VIDEO FILES
File format features
MP3 CDs
MP3 stands for MPEG-1 Audio Layer 3 and comes from the Mo-
tion Picture Expert Group (MPEG) standard, which was developed
for compressing film data.
The MP3 format enables audio files to be saved on a computer
with a sound quality similar to that of a CD. This only requires about
10% of the original data quantity. The standard encoding bit rate
for MP3 files is 128 kbps. Generally, the higher the bit rate of an
MP3 file, the better the sound quality.
Most MP3 files on the Internet are encoded at 128 or 160 kbps.
160 kbps is considered CD quality.
MP3 files can be downloaded from the Internet and then burned
onto a CD-ROM. Your DVD player can read the ID3 tag from the
file header, which contains information on the song and the artist,
and displays this in the info menu/status display.
MP3 CDs contain sound recordings. They can be played in the
normal manner on an audio system. The digital signals transmitted
during MP3 playback are PCM encoded, regardless of the audio
output setting. The signals are output with the same data rate as
the music source (possibilities are: 32 kbps – 320 kbps, ideal:
128 kbps).
MP3 files can be organised into folders and subfolders similar to
files on a computer.
JPEG CDs
JPEG stands for Joint Picture Experts Group. This process was de-
signed to compress picture files.
JPEG files can be burned onto a CD along with other file types.
These CDs are known as file CDs or mixed-mode CDs. For exam-
ple, the CD could contain MP3 files (audio) and JPEG files (for
example to display album covers).
The files on a JPEG CD can be organised in directories. This
structure is similar to that of an MP3 CD.
JPEG CDs only contain data in the compressed JPEG format. This
is mostly data from digital cameras or from imaging programs. The
data (images) can be displayed individually or in sequence in a
slide show.
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