Pioneer CLD-900 Operating Instructions Manual page 5

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