Serial copy management system, Additional features of the premastered md, Sony minidisc system specifications – Sony MINIDISC User Manual
Page 10: What it is and how it works, Serial copy management system (scms)
A
A
D
D
C
C
D
D
A U S T R I A
8
What it is and How it Works
1.3. Serial Copy Management
System (SCMS)
The MD conforms to the SCMS convention (see ISO-
958 + Amendment 84 (C. O.) 126 and 126A). The
Serial Copy Management System allows to make a
first digital copy from digital sources. Further digital
copies from protected sources are prevented, copies
in the analog domain remain possible.
1.4. Serial Copy Management
System (SCMS)
The premastered MD has following additional
advantages:
• The data is stored in physical pits and is therefore
never erased unless it is mechanically destroyed.
• The label area is larger than the one of the record-
able MD. The entire area of one side can be used
for labeling. The recordable MD has a shutter on
both sides and its label is relatively small.
• The premastered MD contains valuable character
information (e.g. disc & track names) which will
not be transferred during copying.
• The subdata capacity of the premastered MD is
bigger. So it is possible to record more character
information onto the MD.
Channels:
Frequency Response:
Dynamic Range:
Wow- and Flutter:
Sampling Frequency:
Coding System:
Modulation System:
Error Correction System:
Disc Speed:
Record/Playback Time:
Cartridge Size:
Disc Diameter:
2 (Stereo)
5 - 20.000 Hz
105 dB
Unmeasurable
44.1 kHz
ATRAC System
EFM
CIRC
1.2 - 1.4 m/sec (CLV)
about 74 minutes
72 x 68 x 5 mm
64 mm
Sony MiniDisc System
Specifications