User Guide

Copy Protection 235

CGMS

The Copy Generation Management System (CGMS) determines whether ﬁrst- and second-

generation copies can be made from a DVD-Video disc. To use APS, the CGMS option must

be set to No Copying.

CSS

Matsushita’s Content Scrambling System (CSS) scrambles data sectors so that DVD and hard

drive copies cannot be read. Individual VTSs are encrypted (when the CP_SEC option is set

to Protection System) with CSS keys, which reside on an area of the disc that cannot be

copied to another medium. DVD players and DVD player software can play back CSS-

encrypted original DVDs but not copies of them.

Adding Copy Protection

Copy protection is conﬁgured in the CMI Settings dialog, where you can apply different

settings to the VMG and each VTS, allowing some to be copied and others protected.

CMI Settings dialog