Content protection system architecture (CPSA) is a basic-level security provided by manufacturers control access to information on DVDs. IBM, Intel, Matsushita, and Toshiba (the famous DVD 4C entity) developed the technology. These companies followed the guidelines provided by the Copy Protection Technical Working Group (CPTWG) to develop encryption, watermarking, protection of analog and digital outputs.
Given below are different levels of Copy protection used DVD companies to safeguard information.
The Analog CPS (used in Macrovision Software)
Macrovision 7.0 prevents basic level analog copying of videotapes. The copy protection is often exhibited in color, distortion, rolling, black & white picture, and dark/light cycling.
Popularly known as Copyguard, this copy protection is present on Computer video cards with composite or s-video (Y/C) output.
Macrovision uses Analog protection to alter the video in two ways:
Using Color stripe technique
Modulating the Colorburst signal
As stated above, the protection is extremely basic and is easily overcome by small softwares like DVD Red, Video Clarifier, Image Stabilizer,...
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