Reference Guide

104 HP Media Center PC Reference Guide
Digital Media Copy Protection
Digital media content such as DVDs or TV programs
may have restricted access depending on the terms
of the copyright owner. This protects copyrighted
media files from being illegally copied and used.
When you record certain music or video files, they
may retain copy protection such as digital rights
management (DRM). DRM encrypts digital media
content and limits access to people who have a
license to play the content.
For more detailed information about digital rights
management, you can go to:
http://www.microsoft.com
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*
*CGMS is Copy Generation Management System and Redistribution Control
Macrovision
n
Digital music and
video providers may
have playback
restrictions for
downloaded
media files.
Signal Method Source Record Encrypt Playback
Copy freely NTSC Yes No Unlimited
Reserved NTSC Yes No Unlimited
Copy once NTSC Yes Yes Unlimited
Copy never NTSC Yes Yes 48 hours
Signal Method Source Record Encrypt Playback
Null Any Yes No Unlimited
Detected Any Yes Yes 48 hours
n
HP supports lawful
use of technology
and does not endorse
or encourage the use
of our products for
purposes other than
those permitted by
copyright law.