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Video Stabilizer/MacroVision Removal

2016-09-10 00:02  
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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.

 

Schematic

This is the schematic of the Macrovision removal circuit

 

Parts

Part
Total Qty.
Description
Substitutions
R1, R2, R3, R4, R5, R7668K 1/4W Resistor 
R6275 Ohm 1/4W Resistor 
R8, R92100 Ohm 1/4W Resistor 
R1012.2K 1/4W Resistor 
R1111.5K 1/4W Resistor 
R12, R172470K 1/4W Resistor 
R13, R16233K 1/4W Resistor 
R1416.8K 1/4W Resistor 
R15122K 1/4W Resistor 
R18147K 1/4W Resistor 
C1115uF Electrolytic Capacitor 
C21220uF Electrolytic Capacitor 
C31220pF Ceramic Disc Capacitor 
C410.0022uF Ceramic Disc Capacitor 
C5, C7, C8, C9, C10, C11, C12, C1370.1uF Ceramic Disc Capacitor 
C610.47uF Ceramic Disc Capacitor 
D1-D9, D10-D18, D19-D27, D28, D29, D30, D31, D32, D33, D34, D35351N4148 Diode 
Q11BC548 NPN Transistor 
Q21BC558 PNP Transistor 
U114040 12-Bit Ripple Counter 
U2, U324027 Dual J-K Flip Flop 
U414011 Quad Two Input NAND Gate 
U51TL802 Dual Op Amp 
U614053 Triple Two Channel Multiplexer 
U714069 Hex Inverter 
J1-J9, J10-J18, J19-J2727Jumper 
J28, J292RCA Jack 
MISC1PC Board, Wire, Sockes For ICs 
 

 

Notes

The circuit was submitted via email byJari Ekstrom. Jari noted that the author isAntti Paarlahtiand that the circuit originally came from the author's website. This website is no longer accessible. However, some searching revealed that the author of the circuit also wrote The MacroVision FAQ. The email address listed for the author in the FAQ is invalid and the FAQ was last updated in late 1996. This circuit reproduced here without permission.Before use, the circuits's jumper need to be set. Take a look at the table below:

 

MacroVision Type
Upper Start Line
Upper End Line
Lower Start Line
PAL0x050x0F0x126
NTSC0x060x0E0xFB

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.

Connect your video source to "Composite Video In". As the label suggests, this circuit accempts composite video signals only. The corrected video signal is sent to the "Composite Video Out" jack.With the two "Video" terminals disconnected the circuit passes video through without modifying it. Jumping the "Video" terminals enables the MacroVision removal.As with all circuits involving CMOS (4000 series) ICs, you must tie the unused inputs of those ICs to ground. This is not shown on the schematic for clarity.Supply voltage is 12V.
 

 


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