Table of Contents
Advertisement
Glossary
Chapter
Sections of a picture or a music piece on a
DVD that are smaller than titles. A title is
composed of several chapters. Each chapter
is assigned a chapter number enabling you
to locate the chapter you want.
Dolby Digital
This sound format for movie theaters is
more advanced than Dolby Surround Pro
Logic. In this format, the rear speakers
output stereo sound with an expanded
frequency range and a subwoofer channel
for deep bass is independently provided.
This format is also called "5.1" because the
subwoofer channel is counted as 0.1 channel
(since it functions only when a deep bass
effect is needed). All six channels in this
format are recorded separately to realize
superior channel separation. Furthermore,
since all the signals are processed digitally,
less signal degradation occurs.
Dolby Surround Pro Logic
As one method of decoding Dolby
Surround, Dolby Surround Pro Logic
produces four channels from two-channel
sound. Compared with the former Dolby
Surround system, Dolby Surround Pro Logic
reproduces left-to-right panning more
naturally and localizes sounds more
precisely. To take full advantage of Dolby
Surround Pro Logic, you should have one
pair of rear speakers and a centre speaker.
The rear speakers output monaural sound.
GB
62
Dolby Pro Logic II Surround
Dolby Pro Logic II creates five full-
bandwidth output channels from two-
channel sources. This is done using an
advanced, high-purity matrix surround
decoder that extracts the spatial properties of
the original recording without adding any
new sounds or tonal colorations.
DTS
Digital audio compression technology that
the Digital Theater Systems, Inc. developed.
This technology conforms to 5.1-channel
surround. The rear channel is stereo and
there is discrete subwoofer channel in this
format. DTS provides the same 5.1 discrete
channels of high quality digital audio. The
good channel separation is realized because
all the channel data is recorded discrete and
processed in digital.
DVD
A disc that contains up to 8 hours of moving
pictures even though its diameter is the
same as a CD.
The data capacity of a single-layer and
single-sided DVD, at 4.7 GB (Giga Byte), is
7 times that of a CD. Furthermore, the data
capacity of a dual-layer and single-sided
DVD is 8.5 GB, a single-layer and double-
sided DVD 9.4 GB, and a dual-layer and
double-sided DVD 17 GB.
The picture data uses the MPEG 2 format,
one of the worldwide standards of digital
compression technology. The picture data is
compressed to about 1/40 of its original size.
The DVD also uses the variable rate coding
technology that changes the data to be
allocated according to the status of the
picture.
Advertisement
Table of Contents
