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Choosing a disc (cont’d)
Structure of disc contents
Normally, DVD video discs are divided into titles, and
the titles are subdivided into chapters.
Audio CDs are divided into tracks.
Title: Divided contents of a DVD video disc.
Roughly corresponds to a story title in short
Chapter: Divided contents of a title. This corresponds
to a chapter in a story.
Track: Divided contents of an Audio CD.
Group: Divided contents of a MP3, WMA or JPEG
data disc. Consists of number of tracks.
Each title, chapter, or track is assigned a number, which
is called “title number”, “chapter number”, or “track
Some discs may not have these numbers.
DVD video disc
Title 1 Title 2
Chapter 1 Chapter 2 Chapter 1 Chapter 2 Chapter 3
Track 1 Track 2 Track 3 Track 4 Track 5
On handling discs
● Do not touch the playback side of the disc.
● Do not stick paper or tape to discs.
On cleaning discs
● Fingerprints and dust on the disc cause picture and
sound deterioration. Wipe the disc from the center
outwards with a soft cloth. Always keep the disc
● Do not use any type of solvent such as thinner,
benzine, commercially available cleaners or
antistatic spray for vinyl LPs. It may damage the
On storing discs
● Do not store discs in a place subject to direct
sunlight or near heat sources.
● Do not store discs in places subject to moisture and
dust such as a bathroom or near a humidifier.
● Store discs vertically in a case. Stacking or placing
objects on discs outside of their case may cause
MP3, WMA, JPEG
Group 1 Group 2
Track 1 Track 2 Track 3 Track 4 Track5