Specifications - Sony SMO-D501 Specification And Operating Instructions

2.2
Format Specifications
The Sony
SMO-D501
complies
with the
Continuous-Composite Format
of
130mm
Optical
Disk
Standard which has
been completed
at
the
October 1987
ISO committee meeting. Refer
to
the
standard specifications for details.
R29.0
-
30.0
mm
Head-in
Area
(Formatted with negative
addresses)
R30.0
-
60.0
mm
Data Area
(Formatted with the
addresses from Track 0 Sector 0
to
Track
18750 Sector
16)
R60.0
-
61
.0
mm
Head-out Area
(Formatted with the
addresses
more than Track 18751)
User
data
and
defect
management
information are written
in
the
Data Area.
2.2.1
Modulation
Code
The SMO-D501
implements (2,7)RLL as
the
modulation code.
The
recording
method
adopts
pit-positfon
recording
of
the
(2,7)RLL and
the
code
is
decoded
by detecting the
peak
levels
in
a read
mode.
The
(2,7)RLL
code
is
translated
as
shown
in
Table
2.5.
Table
2.5
:
(2,7)RLL
Modulation
Code
Input
Data
(2.7)RLL
10
0100
11
1000
000
000100
010
100100
Oil
001000
0010
00100100
0011
00001000
Section 2: Specification S