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Macrovision
- Anti-Copy Process - VHS
Video Copy Protection - How it works
The Macrovision Anti-Copy Process (ACP) is the most effective
and widely used technology for preventing unauthorised copying.
At a Macrovision licensed duplication facilty, the Macrovision process
is added to the video signal as video cassettes are duplicated.
The process is completely transparent on the original tape, yet
it degrades unauthorised copies made on the majority of all consumer
VCR and TV combinations. When a consumer attempts to make a copy,
Macrovision's technology confuses the automatic gain control of
the recording VCR, weakening the video signal and causing copies
to exhibit some or all of the following characteristics: dim and/or
noisy pictures, loss of colour, loss of video and picture tearing.
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