Be careful - ACP[1] for VHS recorders was patented, and manufacturers were forced to implement it (and pay the royalties.) [1]:[http://en.wikipedia.org/wiki/Ma

Be careful - ACP[1] for VHS recorders was patented, and manufacturers were forced to implement it (and pay the royalties.) [1]:[http://en.wikipedia.org/wiki/Macrovision#Content_protection_.28RipGuard_and_Analog_Copy_Protection.29 http://en.wikipedia.org/wiki/Macrovision#Content_protection_...]