No matter what, an overscanned image will be softer and potentially noisier than a non-overscanned image. ![]() Even if it does a good job at this, it can't be as good as just leaving the signal be. So if your TV takes that image, and zooms in on it, it has to readjust every pixel to fit. The signal you're sending it, either from cable/satellite, Blu-ray or some 4K source, is exactly the same number of pixels as your TV ( yes, 1080i has the same number of pixels as 1080p). The problem is, there's very little reason you should have overscan enabled on your TV today, especially if, now that you've read this article, you're aware that very, very infrequently, you might see something on the edge of the screen that shouldn't be there. This actually continued into the digital era, where early HD broadcasts (especially live ones) would show things in frame that shouldn't be (mic stands, black bars on the edges of footage, etc). You'd lose some of the edges of the image, but you'd never see something unintended. ![]() ![]() As in, they'd zoom into the image slightly. So to make everyone's life easier, TV manufacturers designed their sets to "overscan" the screen area.
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