Vidikron Vision 15ET/CineWideTM operation manual 7. Overscan Examples

Operation

Overscan: Some SDTV/EDTV 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. (For HDTV, DVDs and other video sources, overscan is generally not necessary or desirable.)

•Overscan Type: There are two overscan types:

•Crop adds a mask at the top, bottom, left and right edges.

•Zoom adds a factor to the scaling of the source image. Anything outside of the original image area is removed.

•Overscan Adjust: This control defines the amount of overscan applied to the image. The range is from 0 to 5.

•In Crop mode, each increment adds a mask at the left and right edges of the source image equal to 1% of the displayed horizontal resolution (2% total), and at the top and bottom edges equal to 1% of the displayed vertical resolution (2% total). A setting of 5, for example, crops the image 5% on all sides or 10% total.

•In Zoom mode, each increment adds a factor to the scaling of the source image so that the vertical and horizontal resolutions are 100% plus 2% increments of the size determined by the aspect ratio function. A setting of 5, for example, zooms in on the image 5% on all sides or 10% total.

Figure 4-7illustrates the effect of each overscan setting.

No Overscan Crop Zoom

4:3

16:9

Overscan Type	Crop
Overscan Adjust	0

= Source Image Area

= Mask (Crop) Area = Screen (16:9)

Figure 4-7. Overscan Examples

YUV/RGB Adjust: Use the settings in the YUV/RGB Adjust menu to fine-tune 480p and higher-resolution signals for optimum picture quality.

•H. Position: Use the up- or down-arrow buttons ( , ) to select H. Position. Then, use the right-arrow button ( ) to shift the image to the right; use the left-arrow button ( ) to shift the image to the left.

•V. Position: Use the up- or down-arrow buttons ( , ) to select V. Position. Then, use the right-arrow button ( ) to shift the image up; use the left-arrow button ( ) to shift the image down.

•Clock: If you notice flickering or vertical noise when displaying computer images, adjust the Clock setting to correct the issue.

Vidikron Vision Model 15 Installation/Operation Manual 47