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GLOSSARY
4:3 Letterbox Screen
This is one method for displaying a wide screen
picture on a conventional sized (4:3) TV. While
viewing a wide screen picture, the black bars
appear on the top and the bottom of the screen.
4:3 Pan-Scan Screen
This is one method for displaying a wide screen
picture on a conventional sized (4:3) TV. While
viewing a wide screen picture, the left and right
edges of the pictures will not be shown on the
screen.
Dolby Digital
This is a digital audio compression technology
that was developed by Dolby Laboratories. Dolby
Digital encoding method (so-called discrete 5.1
channel digital audio format) records and
compresses the left front channel, right front
channel, center channel, left rear channel, right
rear channel, and LFE channel (total 6 channels,
but LFE channel is counted as 0.1 channel,
therefore called 5.1 channels) signals digitally.
Each channel is completely independent from
other channel signals to avoid interference,
therefore, you can obtain much better sound
quality with stereo and surround effects.
To reproduce these original surround signals, you
need to connect an amplifier or a decoder
compatible with Dolby Digital.
DTS Digital Surround
Another discrete 5.1 channel digital audio format,
available on CD, LD, and DVD software,
developed by Digital Theater Systems, Inc.
Compared to Dolby Digital, audio compression
rate is relatively low. This fact allows DTS Digital
Surround format to add breadth and depth to the
reproduced sounds. As a result, DTS Digital
Surround features natural, solid and clear sound.
To reproduce these surround signals, you need to
connect an amplifier or a decoder compatible
with DTS Digital Surround.
Linear PCM
This is a digital recording format that is used for
audio CDs.
Playback Control (VCD)
When a VCD has the PBC (Playback Control)
function, you can enjoy menu-driven operations
and high-resolution still pictures.
Sampling Frequency, Quantization Bits
When analog signals are converted into digital
signals, they are divided into many points and
digitized. This dividing method is called
“sampling.” The sampling frequency indicates
how many points one second is divided into – for
example, for CD sound, one second is divided
into 44100 points since its sampling frequency is
44.1 kHz. On the other hand, the number of
quantization bits indicates the volume size used
to memorize each divided point.
The larger this number is, the clearer the sound
can be reproduced.
Titles and Chapters (DVD)
A DVD is divided into several titles (large
divisions), and each title is divided into chapters
(smaller divisions).
These divisions are assigned their particular
numbers, so that they are easily accessed.
Tracks (VCD, CD)
VCDs and CDs are divided into tracks. Each
track has its own number so that it is easily
accessed.
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