There are also boxes that correct the ‘false signal’ that Macrovision sends to the recording device. Some DVD players have a ‘secret’ remote control code that can disable Macrovision. There are ways to disable it, mostly known to the tech-savvy. Macrovision protection in VHS and DVD isn’t uncrackable. This is because most TVs don’t come with AGC. Macrovision protection in VHS and DVD doesn’t interefere with your video content if you play the tape or disc directly to your TV. The whole idea is to interfere with your enjoyment of the recorded video content. The recorded video is garbled or you’ll see a black screen, then a bright screen when you play back the video. The signal interferes with the working of the automatic gain control (AGC) of the recording machine resulting in inaccurate recording of the source content. The Macrovision tape sends a kind of signal that the copying VCR or DVD recorder can’t handle. It allows copying but ‘spoils’ the copy made. That’s what the function of Macrovision is. However, the resulting copy will be garbled or ‘messed up’. You can copy a Macrovision-protected tape or DVD through a VCR or a DVD recorder.
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