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11.4. Playing/reading discs
Many discs run automatically when they are inserted. This depends on
the operating system and the relevant settings.
Your PC is capable of playing audio CDs, DVD films or data discs from the optical
drive. Once a disc has been loaded, a dialogue box opens containing various
playback options. Normally, there will be a number of different options available.
Playback of DVD film titles includes decoding MPEG2 video, digital AC3 audio data
and decoding CSS-protected content.
CSS (sometimes also referred to as Copy Guard) is the name of a data protection
program used by the film industry to protect against illegal copying. Among the
many controls for CSS licensees, the most important of the playback restrictions
involve country-specific content. To make it easier to create geographically separate
film releases, DVD titles are coded for specific regions. Copyright laws require that
each DVD film be limited to a specific region (usually the region where it is sold).
DVD film versions can be published in multiple regions but CSS rules require that
each CSS decoder system may only be used for one region.
The region setting can be changed up to five times via the viewing
software before the last setting becomes permanent. If you then wish to
change the region setting again, this must be carried out by the
manufacturer. Any shipping and configuration costs must be borne by
the user.
11.5. Handling blank CDs and DVDs
Normal CDs are pressed by a glass master and then sealed. With blank discs, digital
information is burned onto them using the drive’s laser. They are therefore more
sensitive than conventional discs.
Because of this, it is essential to avoid, particularly in the case of unused blanks:
• exposure to direct sunlight (UVA/UVB radiation)
• scratches and damage
• extreme temperatures
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