That was Macrovision, which was a signal inserted into the top few frames that weren’t shown on a TV, but which the VCR used to calibrate its black level. I designed a box which removed them so I could make copies of stuff. It was a bit pointless with hindsight, because I very rarely watched the copies I made. I think the enjoyment of getting one over on the man was far more than actually watching the films.
That was Macrovision, which was a signal inserted into the top few frames that weren’t shown on a TV, but which the VCR used to calibrate its black level. I designed a box which removed them so I could make copies of stuff. It was a bit pointless with hindsight, because I very rarely watched the copies I made. I think the enjoyment of getting one over on the man was far more than actually watching the films.