Sony DAV-X1 - Manual (Page 88)

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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
a worldwide standard 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
processes allocated data according to the status
of the picture.
The audio data is recorded in Dolby Digital as
well as in PCM, allowing you to enjoy more
realistic audio presence.
Furthermore, various advanced functions such
as the multi-angle, multilingual, and Parental
Control functions are provided with the DVD.
DVD-RW
A DVD-RW is a recordable and rewritable disc
that is the same size as a DVD VIDEO. The
DVD-RW has two different modes: VR mode
and Video mode. DVD-RWs created in Video
mode have the same format as a DVD VIDEO,
while discs created in VR (Video Recording)
mode allow the contents to be programmed or
edited.
DVD+RW
A DVD+RW (plus RW) is a recordable and
rewritable disc. DVD+RWs use a recording
format that is comparable to the DVD VIDEO
format.
File
A JPEG image recorded on a DATA CD. (“File”
is an exclusive definition for this system.) A
single file consists of a single image.
Film based software, Video based
software
DVDs can be classified as Film based or Video
based software. Film based DVDs contain the
same images (24 frames per second) that are
shown at movie theaters. Video based DVDs,
such as television dramas or sit-coms, displays
images at 30 frames (or 60 fields) per second.
HDMI (high-definition multimedia
interface)
HDMI is an interface that supports both video
and audio on a single digital connection. The
HDMI connection carries standard to high
definition video signals and multi-channel audio
signals to AV components such as HDMI
equipped TVs, in digital form without
degradation. Since the video signals are
compatible with the current DVI (digital visual
interface) format, HDMI jacks can be connected
to DVI (digital visual interface) jacks by way of
an HDMI -DVI (digital visual interface)
converter cord. The HDMI specification
supports HDCP (high-bandwidth digital
contents protection), a copy protection
technology that incorporates coding technology
for digital video signals.
Interlace format
(Interlaced scanning)
The Interlace format is the NTSC standard
method for displaying TV images at 30 frames
per second. Each frame is scanned twice -
alternately between the even numbered scanning
lines and then odd numbered scanning lines, at
60 times per second.
Multi-angle function
Various angles of a scene, or viewpoints of the
video camera are recorded on some DVDs.
Multilingual function
Several languages for the sound or subtitles in a
picture are recorded on some DVDs.
Parental Control
A function of the DVD 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 60 frames per
second by reproducing all scanning lines (525