Runco LS-10I operation manual Aspect Ratio Settings, 169, Letterbox

Operation

Aspect Ratio: To change the aspect ratio (size and shape) of the projected image, press or to highlight Aspect Ratio. Use the or buttons to select the appropriate

aspect ratio for your screen size, installed lens configuration and the type of program material being viewed, then press ENTER; refer to Table 4-2.

Note that some aspect ratios are unavailable and/or not useful with certain types of source material. The optimal setting depends on a number of factors, such as:

•The aspect ratio of the source material, as broadcast or encoded on the playback medium.

•The “display type” (16:9 or 4:3) and output resolution settings at the source component. Most modern DVD/BD players and set-top boxes have such controls.

•Viewer preference (original aspect ratio with “black bars,” or a full-screen presentation with some distortion or cropping).

Table 4-2. Aspect Ratio Settings

Aspect		Aspect		Geometry of Projected Image
		Ratio of
Ratio	Description		With Standard Lens
		Source			With Anamorphic Lens (2.35:1 Screen)
Setting
		Signal	(1.78:1 Screen)

16:9

	16:9 linearly scales the
16:9	source active image
	horizontally and vertically
	to fill a 16:9 screen.

4:3

	With a 16:9 source
	image, Letterbox mode	16:9
	crops the top and
	bottom portion of the
	image and vertically
	stretches the remaining
Letterbox	portion to fill a 16:9
	image area.
	It scales (zooms in on) a
	4:3 image linearly (by the
	same amount on all	4:3
	sides) to fill a 16:9
	display.

Runco LS-10i Installation/Operation Manual 47