Table of Contents
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The
Q data called subcode
Q is used for TOC
(Table of Contents) at the lead-in area and mode con-
trol signals for preemphasis, etc. and also for display
and address data of track number (TNO) and index
number,
playing time and other information during
a selection.
This data is input to mechanism control IC (IC701)
SUB Q pin from IC601 and is written in to the RAM
in 8 bit units.
The data is sent out as needed
from the mecha-
nism control IC701 to the master control IC (IC702)
and is displayed onthe
display tube.
Data is sent
from the mechanism
control IC to the master control
IC about 8 times in one second.
CDP-502ES/620ES
ee
ee
8
te
S88
E88
eS
SHE
ESTES
SST SS SESS
STEELS
ETE
1-3.
DIRECT
SEARCH
On
this set, a linear motor
is used for the sled
motor, so that besides 100, 10 and 1.track jump, the
optical pick-up can be moved directly to the address
specified by the microcomputer. (direct search). (On
the conventional
CD player, only the objective lens
moves, and the optical pick-up follows it by servo in
order
to perform
100, 10 and 1 track jump only.)
Higher performance access is enabled on this set.
On
the convertional CD player, only three data,
AO (MNR
of first selection on the disc), Al (MNR
of last selection on the disc) and A2 (leadout track
start point) were memorized when TOC data was read
in to the microcomputer.
However,
on this model,
the absolute time from the first to the 21st selection
is memorized
in the microcomputer.
This absolute
time is converted to track numbers inside the micro-
computer,
and
the track
number.to
be jumped
is
obtained
by subtracting
the
current
address
track
number from the track number of the selection to be
jumped to.
PMIN, PSEC, RFRAME
00, 02, 32
00, 02, 32
00, 02, 32
10,15, 12
10, 15,12
10,15, 12
16, 28, 63
16, 28, 63
16, 28, 63
Frame number
49, 10, 03
49, 10, 03
49,10, 03
01, 00, 00
01, 00, 00
01, 00, 00
06, 00, 00
06, 00, 00
06, 00, 00
52,48, 41
52,48, 41
52, 48, 41
00, 02, 32
00, 03,-32 |7Peat
Frame number:
98 symbol, 1 block No.
POINT =
For AO, PMIN indicates MNR of first selection
on the disc. PSEC, PFRAME are ''00".
POINT = For Al, PMIN indicates MNR of last selection
on the disc. PSEC, PFRAME are ''00".
POINT = For A2, PSEC, PFRAME indicate lead-out
track start point.
POINT = For 01-06, PMIN, PSEC indicate the absolute
time of the selection.
Table A. TOC Structure (Example of a 6 selection disc)
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