Pioneer CLD-900 Betriebsanleitung - Seite 5
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About LaserVision Discs
There are two kinds of LaserVision discs: standard play disc,
and
extended
play
disc.
Some
discs
also
use
digital
technology
to record
the audio
signals
(LaserVision
with
Digital Sound Disc).
Standard Play (CAV) Discs
Standard Play
These discs are called CAV discs since they play at a '""Con-
stant Angular Velocity."
These discs allow such special functions as STILL/STEP,
FAST, and MULTI-SPEED
play. In addition, standard play
discs allow random access, chapter stop, and interval repeat
playback.
Extended Play (CLV) Discs
Extended Play
Since these discs play at a 'Constant Linear Velocity,'' they
are called CLV discs. Compared to standard play (CAV) discs,
the CLV disc allows longer playback time.
The special effects playback available with the CAV discs can-
not be performed with CLV discs, but random access, chapter
stop, and interval repeat playback may be performed.
LaserVision with Digital Sound Discs
These discs have PCM (Pulse Code Modulation) audio signals
(the same as on a Compact Disc) recorded together with the
normal analog audio signais.
As a result, in addition to the high quality of video image ob-
tainable with the LaserVision disc, you can also enjoy the
same kind of digital sound found on the Compact Discs.
These audio channels are recorded using separate frequency
bands as shown below.
In these Operating Instructions, the two audio channels will be
referred to for convenience
as the "Analog
Sound"
and
"Digital Sound" signals.
Digital Sound
Analog Sound
7
—s
Recording
level
1
2
3
4
5
6
7
8
9
10
Frequency (MHz)
Recording Signal Spectrum
ssoRee
e
e
SSE
SSS
ESE
EPS
GSS
SR
SS
PE
SSR
EERE
ZEST
TPES
ETS
CRS
SN