Sony CMT-DH30 Operating Instructions Manual page 106

Parental Control
A function of the DVD VIDEO to limit
playback of the disc by the age of the
users according to the limitation level in
each country. The limitation varies from
disc to disc; when it is activated, playback
is completely prohibited, violent scenes
are skipped or replaced with other scenes
and so on.
Playback Control (PBC)
Signals encoded on VIDEO CDs (Version
2.0) to control playback. By using menu
screens recorded on VIDEO CDs with
PBC functions, you can enjoy playing
simple interactive programs, programs
with search functions, and so on.
Progressive format (sequential
scanning)
In contrast to the Interlace format,
the progressive format can reproduce
50  60 frames per second by
reproducing all scanning lines (525
lines for the NTSC system, 625 lines
for PAL system). The overall picture
quality increases and still images, text
and horizontal lines appear sharper. This
format is compatible with the 525 or 625
progressive format.
10
GB
Region Code
This system is used to protect copyrights.
A region code is allocated on each DVD
system or DVD VIDEO according to
the sales region. Each region code is
shown on the unit as well as on the disc
packaging. The system can play back
the discs that match its region code. The
system can also play back discs with the
" " mark. Even when the region code
is not shown on the DVD VIDEO, the
region limit may still be activated.
Scene
On a VIDEO CD with PBC functions,
the menu screens, moving pictures and
still pictures are divided into sections
called "scenes. "
Title
The longest section of a picture or a
music piece on a DVD VIDEO; a movie,
etc., for a picture piece on video software,
or the entire album in audio software.
Track
Section of a picture or a music piece on
a VIDEO CD, CD, or MP3. An album is
composed of several tracks (MP3 only).