What Is APS?
Analog Protection System (APS) is a DVD copy prevention system originally developed by Macrovision (a globally-operating, US-based company that provides guidance technology, entertainment data, copy protection, industry standard networking and media management technology for digital entertainment devices and services; changed its name to Rovi in 2009). The copies of DVDs encoded with APS will become garbled and unwatchable.

How Does APS Work?
APS works by adding pulses to analog video signals to negatively impact recording device. In digital devices changes to the analog video signal are created by a chip that converts the digital video to analog within the device. In DVD players trigger bits are created during DVD authoring to inform the APS that it should be applied to DVD players analog outputs or analog video outputs on a PC while playing back a protected DVD-Video disc. APS is invisible to the user, but it substantially degrades or blocks copies from being made.

Passkey Solution
Passkey is powerful to help you get rid of APS protection on DVD so that you can use other software to access the DVD content and get a wonderful copy which can be played smoothly for you to enjoy.