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TYPES OF DISCS THAT CAN BE PLAYED WITH THIS UNIT
CD VIDEO SYSTEM (*1) |
The CD VIDEO SYSTEM
is the standard name for the "'ap-
tical video disc with digital audio'' system that encompasses
both LDs and CDV discs.
The following mark is the standard mark for the CD VIDEO
SYSTEM
and is found on all players and discs which con-
form to the CD VIDEO SYSTEM
format.
The
following
systems
are
included
in the
CD
VIDEO
SYSTEM:
E_—=
CD VIDEO
® CDV (CD VIDEO CDV) discs
® LaserVision
Discs (CD VIDEO
LDs) containing
digital
sound with sub-codes
® Compatible players which can play CDs and CDV discs
® Compatible players which can play CDs, CDV discs, and
LDs
CD VIDEO LDs (*4)
A CD VIDEO LD is an LD with digital audio which is encod-
ed with sub-codes (data such as TOC and track number
data, excluding audio and video signals).
LDs (LASERVISION DISCS) |
With this unit, only play LaserVision discs which bear the
following mark.
Ly
.«
LASER DISC
Lesertision
This mark is the standard mark for LaserVision video discs.
Players and discs which bear the LaserVision mark are mutu-
ally compatible as long as they conform to the same televi-
sion system.
Two types of standard LaserVision disc are available — stan-
dard play (CAV) (*5) discs and extended play (CLV) (*3)
discs — which differ with respect to their signal recording
systems.
CAV (*5) DISCS
The jackets and labels of these discs are marked with a
"Standard Play Disc CAV" or ''Standard Play'' indication.
Frames are recorded on these discs at a ratio of one frame
per disc revolution, and the discs are played at a fixed rota-
tional speed (CAV = Constant Angular Velocity) of 1,800
rpm. This system is well suited to special playback modes
such as still frame playback and multi-speed playback. One
side of a CAV disc can have a playback time of up to 30
minutes (for a 12-inch disc), which is equivalent to 54,000
frames. Each frame—from frame 1 to frame 54,000—is en-
coded with its own frame number.
*
Playback time varies according to the contents of the
disc.
CLV (*3) DISCS
The jackets and labels of these discs are marked with a '/Ex-
tended Play Disc CLV"
or ''Extended Play"' indication.
Signals are recorded on these discs at a constant linear ve-
locity (CLV), and the rotational speed during playback varies
from 1,800 rpm for the innermost track to 600 rpm for the
outermost track. As a result, one side of a CLV disc can have
a playback time of up to 60 minutes (for a 12-inch disc),
which is twice as long as a standard play (CAV) disc. CLV
discs are encoded with time numbers which correspond to
the elapsed play time from the beginning of the disc.
*
Playback time varies according to the contents of the
disc.
LASERVISION DISCS WITH DIGITAL AUDIO (*6)
The jackets and labels of these discs bear the following
mark.
digital o. sisitel
Bus
&i
These are LaserVision discs which contain digital audio sig-
nals in addition to conventional analog audio signals. This
feature allows the high image quality of LaserVision discs
to be enjoyed together with the superior quality of digital
sound. The digital and analog audio signals are recorded on
the disc using different frequency bands.
LASERVISION MULTI AUDIO DISCS WITH DIGITAL
AUDIO
The jackets and labels of these discs bear the following
mark.
Higitol and wuiti auoio or Meiig/ MUTT AUDIO
These are LaserVision discs in which the recorded digital
and analog audio signals differ in content. This allows the
user to enjoy two different audio soundtracks by switching
between the digital and analog sound.
CDV (COMPACT
DISC WITH VIDEO)
DISCS
These are compact discs which also contain video signals.
Of the total 25-minute
playback time of a CDV disc, 20
minutes is encoded with conventional CD digital audio sig-
nals (the ''audio part''). The remaining 5 minutes is encod-
ed with both video and digital audio signals (the ''video
part').
3
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