|Home > Circuits > Other > Video Stabilizer/MacroVision Removal|
|Have you ever attempted to copy a commercially produced video only to end up with a distorted and jumpy image? If so, then you have run afoul of MacroVision. MacroVision is the most popular copy protection scheme used on the majority of content distributed on VHS cassettes. Like all copy protection, it does nothing to discourage the real pirates and only annoys the user who may wish to create a legal copy for backup and archival purposes. This circuit can eliminate MacroVision encoding in both NTSC and PAL recordings.|
To set the jumpers, first convert the line numbers to binary. You will end up with three binary digits, one for each set of line numbers. Bit 0 is least significant, bit 8 is most significant. Now simply open the jumpers at the 0 bits and close the jumpers at the 1 bits.
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|I don't know much about this but have a look here: http://www.kolumbus.fi/pami1/macrovision/ The PDF of a circuit-diagram is shown at the link "Schematic Diagram A4 PDF" The circuit-diagram on this page appears to have a mistake because it shows pin 5 of U5B grounded. Instead, it should have a 220nF capacitor to ground.|
|Has anyone actually built this and got it working? If so what changes are necessary? I also have the concern Ken expressed.|
|U5 appears to be a keyed clamp, with a mistake. I think C13 should be connected to pin 5, not pins 6 and 7, and the ground connection to pin 5 deleted. When the switch U6B is closed, a charge is then placed on the capacitor at U5 pin 5, and the voltage follower U5B makes that voltage available at U5 pin 7.|
|I wonder how this is supposed to work at all with U5 pin 5 grounded? any signal from U5a when the analog switch is closed will just go to ground.???|
|I wonder how this might be made to work with s-video.|
|I have a TV/VCR combo and the VCR quit, but the TV works fine. you know what happens when you connect another VCR to a combo, it treats it like another VCR, this circuit should solve the problem. I cant wait to get it built, thks.|
|i love it!!! wohooo|
|how was this made i want to know more.|
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