Planar PD7170 operation manual Crop, Overscan Examples

Operation

Overscan: Some television programs are produced based on the assumption that older television sets may not display the outer edges of the broadcast picture area. Overscan effectively hides these inactive, outer edges of the image. Choose one of the following:

•Off: This setting leaves the image as-is.

•Crop: This setting adds a mask at the left and right edges of the source active image equal to 3% of the displayed horizontal resolution, and at the top and bottom edges equal to 3% of the displayed vertical resolution.

•Zoom: This setting adds a factor to the scaling of the source active image so that the vertical and horizontal resolutions are 106% of the size determined by the aspect ratio function. Anything outside of the original image area is removed.

Note	When the Aspect Ratio is set to Native, set Overscan to Off or
	Crop.

Figure 4-6illustrates the effect of each overscan setting for each aspect ratio.

Off

4:3

16:9

4:3 Narrow

Native (480p)

CropZoom

= Source Image Area

= Edge Noise

= Screen (16:9)

Figure 4-6. Overscan Examples

Planar PD7170 Installation/Operation Manual 47