Planar PD7170 用户手册

PREL

IMINA

RY

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.

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

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

Off

Crop

Zoom

4:3

16:9

4:3 

Narrow

Native
(480p) 

= Source Image Area

= Edge Noise

= Screen (16:9)