Underscanning would be the opposite of overscanning, where the image is smaller than the area on which it is being displayed. It would be tantamount to zooming out when you look at a picture; though in the case of TV sets, the space that doesn't reach the edges of the display would be black. The deliberate use of overscanning allows the screen to be completely filled, as opposed to underscanning, which could have varying degrees of underscanned margins. The reason why we notice overscan more so on a computer is that we already know what the signal is suppose to look like: where the start menu button should be, where the clock should be, where the corners of the screen should be in relation to our desktop shortcuts.
A DVD to a DTV or even a regular TV usually encounters some measure of overscan, though we hardly notice it because we aren't use to its native signal.
One way that DVD player manufacturers' or TV manufacturers' compensate for this is to provide a zoom out function, where you tell the system essentially to underscan. This is why we go crazy when we notice overscan from a X-Box rather than from DVD signal; you know where the game menu is supposed to look like. They accept many legacy signals: camcorders, s-video, composite, etc All of this means that there must be a cross platform support for all formats, and the only way for that to occur is to either overscan or underscan.
Underscanning would be more frustrating to the consumer, since the signal would be smaller than the displayed area with the black bars surrounding the image. Overscan ensures that video signal always fills the screen, though this gets to be increasingly frustrating when you get an X-Box or output video from your computer and the signal is overscanned.
And as Keith Rochford Chief Engineer of eVGA explained, when you switch to a DTV, you are now talking about a high resolution display, and backwards engineering a pixel technology to a line scan technology isn't a simple task.
For those who own something like a plasma display that can do direct computer video output via VGA or DVI, this obviously isn't an issue, since there is no backwards conversion needed. It is essentially like a really big computer monitor, since it keeps the video card's native output. Option 1 will present a list of displays that look like little televisions; if you only have 1 display then it will already be selected; otherwise, click on the display that is giving you trouble.
Under Option 2, it should say "Apply the following settings:" and it will have the following radio buttons sub-options : "Aspect Ratio", "Full-screen" and "No scaling".
Try each radio button one at a time , then click Apply, and see if that fixes the display so that it fits the entire screen. If it doesn't, then select the "Aspect Ratio" setting as your default, then click Apply and move onto the next step. Next, click the "Size" tab near the "Apply the following settings:" heading. Following that, click the option which says " Enable desktop resizing ", then click on the Resize button. A new window will appear with some sizing options.
Try and make the white border fit around the edge of your screen. I hope that helps! Additional 1-on-1 Support: From Dennis If all of this is over your head, or you can't quite figure out how to make it work, I can connect to your computer and help set it up for you using my remote desktop support service. Got a Computer Question or Problem? Ask Dennis!
Filed under:. For example, the Windows taskbar may appear off-screen and not be completely visible. This page provides guidelines for compensating for overscan so that all content is visible on the screen. When you are using the PC as a source, you can achieve the best results by using the control settings provided by your display manufacturer to turn off overscan. These controls are identified differently, depending on the manufacturer. Use the following guidelines to help you identify the correct controls and apply the proper setting:.
Alan December 1, , am. Jason January 19, , am. I am glad to hear that this worked out for you! Let me know if there is anything else I can do. Semmy March 17, , am. You really saved me a lot of tedious work, thank you very much.
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