Quote:
Originally Posted by ChrisW6ATV
Yes, old_tv_nut described it perfectly. This is one reason an old B&W TV can look so good.
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Yep. For those who might still not be sure what effect DC restoration has on a picture, here are a couple of common examples where the effect becomes really obvious:
- Credit roll with white text on a black background-- on a TV with good DC restoration, the background will stay black no matter how much (or how little) white text is on the screen, and the white text will stay the same white. With no DC restoration, the "black" background may not go totally black, and will shift up and down in brightness depending on how much white text is on the screen, and horizontal "stripes" of darker grey may form around the white text as it rolls up the screen.
- Fade to black-- a TV with good DC restoration will actually fade to black. On a TV with no DC restoration, the scene will instead wash out into a mid grey.
Also, while only applicable to modern times, try watching any sort of "letterboxed" content on a TV with no DC restoration, and you'll see the "letterbox" areas of the screen pulse up and down in brightness as the overall brightness of the scene changes.