This is some old stuff. SSAVI (Sync Suppression and Active Video Inversion) was used before the broadcast of satellite television was digitized. It was often used in apartment buildings (cable TV) where the incoming (analog) television signals were correct and just the sought-after movie channels was encoded. FILM NET was the precursor to CANAL+

Before it was send to customers or tenants, it was necessary to encode it. The coding was done on the video signal, not the carrier of the video signal. Everything was analog, and therefore it was also possible to find ways to restore the distorted video signal.

At first it was just the line sync pulse, which was raised in terms of the dc-level. Then increase a more advanced coding that inverted all images - so white became black and vice versa. It seemed that a low-frequency sine wave was introduced into the video signal, at the end of the analog era.

TS61 is not the whole solution and will not cancel the SSAVI code. ”TS” stands for Trigger Synchronize and are only able to establish the vertical and horizontal sync pulses from the picture. It can also be used for other purposes - not only to suppress SSAVI.

If you want to look closer on this thing you can download it here:

In the zip-file can you find everything required to implement it (manuals, diagrams and PCB-files)
- except to realizing it.

Macrovision is like the previous project - a quite old-fashioned decoding system, but it still used as protection for the copying of DVDs through a DVD player.

MV412 is a variant designed to work with TS61. So to make it function, you must built TS61 first!

If you want to look closer on this thing you can download it here:

In the zip-file can you find everything required to implement it (manuals, diagrams and PCB-files)
- except to realizing it.

MVS51 is a stand alone Macrovision decoding unit and is intended to be placed between a DVD player and a VHS player or between two VHS players through a Scart connection. It needs a current around 70 mA to operate properly.

If you want to look closer on this thing you can download it here:

In the zip-file can you find everything required to implement it (manuals, diagrams and PCB-files)
- except to realizing it.