Copy Protection For Dvd Movies; Cgms; Macrovision - HP z545 Software Reference Manual

Copy protection for DVD movies

Most DVD movies in the market are encrypted with copy
protection to prevent illegal duplication of copyrighted
material. This protection distorts the picture quality when
copied or prevents it from being copied. The following
tables shows two of the currently used copy protection
methods and their effect on playback.

CGMS*

Signal Method
Copy freely
Reserved
Copy once
Copy never
*CGMS is Copy Generation Management System and Redistribution Control

Macrovision

Signal Method
Null
Detected
134
Microsoft Windows XP Media Center Edition 2005 Reference Guide
Source Record
NTSC Yes
NTSC Yes
NTSC Yes
NTSC Yes
Source Record
Any Yes
Any Yes
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permitted by copyright law.
Encrypt
No
No
Yes
Yes
Encrypt
No
Yes
n
Playback
Unlimited
Unlimited
Unlimited
48 hours
Playback
Unlimited
48 hours