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A LITTLE Bl'f
1
ABOUT
THE VIDEO DISC AND THE VIDEODISC PLAYER
A spiral pattern of pits is recorded about 1.1 mm under the
surface of the video disc.
In the LDP-1000A videodisc player, a laser beam focuses on
the pits and then reflects. Variations in the reflected beam
are detected and converted into the video and audio
playback signals. The playback picture and sound are ob-
tained by a monitor or a TV receiver connected to the video
disc player.
This videodisc system has the following features:
No physical contact between pick-up system and disc
Because a laser beam is employed for signal pick-up, there
is no physical contact with the disc, which means no wear.
In addition, because the pit pattern is recorded below the
surface of the disc, it is not necessary to be constantly on
guard against fingerprints and dust, making the video disc
easy to handle.
High accuracy insured high-quality picture
Newly-developed CCD chips enable the effects of the time
base error and disc eccentricity to be eliminated.
Flexible use of video discs
The brushless spindle motor makes the system set in the
standby mode in about 10 seconds alter a disc is inserted.
The system can play both the GAV• and CLV • • video
discs. With a GAV disc, the system can play back (or in
reverse) at various speeds, can display a still picture and
can perform a number of other functions with the aid of a
built-in microprocessor.
High speed access
You can locate a particular point on a disc within five
seconds. With a GAV disc, a particular frame or segment
can be searched for, and with a CAV/CLV disc with chapter
data, a particular chapter can be searched for.
*
CAV (constant angular velocity) disc
The GAV disc rotates at 1800 r.p.m. and the laser beam moves from
the inner part of the disc to the outer. Up to 30 minute playback is
possible on one side of the disc. On the disc, up to 54,000 frames
can be recorded. Each frame of the playback picture is recorded as
one rotation and the frame number is recorded on the track.
With a CAV disc, playback at variable speeds, frame number and
play mode display and operations with control instructions are
possible.
• • CLV (constant linear velocity) disc
The CLV disc rotates at a speed between 1800 r.p.m. and 700 r.p.m.
with constant linear velocity. The laser beam moves from inner part
of the disc to the outer as with GAV disc. Playback of up to one
hour is possible on one side of the disc, though only the normal
play, the scan and the search operations are possible. The elapsed
playback time can be displayed on the monitor screen.
4
Remote control of the system is possible
The system's control unit can be detached and used as a
wireless remote control unit or with the supplied remote
cable, as a wired remote control unit.
A variety of possible connections
The LDP-1000A is equipped with an RS232C serial interface
connector so that it can be connected to a computer. The
LDP-1000A is also equipped with SYNC IN and SC IN con-
nectors so that it can be operated in synchronization with
the external sync signal and so that a special effects
generator can be connected to the LDP-1000A.
DATA ON THE VIDEO DISCS
Frames
A GAV disc has up to 54,000 "frames" which are numbered
in sequence. You can search for a particular frame or repeat
a particular sequence of frames.
#Fmme
54,000
Frame 3
F,ame2~J\\'
I
Frarne 1
',;:::
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Frame 40,CXXJ
Chapters
There are GAV and CLV discs on which "chapters" are
recorded, as the chapter of a book. If a chapter number is
displayed after a frame number has been displayed (on a
GAV disc) or if playback time is displayed in minutes (on a
CLV disc) when you press the [INDEX] key, the disc has
chapter data.
You can easily search for a particular chapter and play it
back repeatedly.
Chapter 2
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