User guide

Section 1: Introduction IMAGESTAR HD USER GUIDE
Page 16 I460GB issue 4
Source Scaling & Viewporting
Typically the selected input source will be scaled to fill the entire target display area. Where the
aspect ratio of the display does not match the aspect ratio of the source, the source will usually be
stretched (either horizontally or vertically) to fit the display.
The following examples show the effect of source scaling on different display layouts:
Original 4:3 Source
Stretched Vertically
for a 1 x 4 Display
Stretched Horizontally
for a 4 x 1 Display
Alternatively, ImageStar HD offers Viewporting capability which allows you to display a specific area
of the source frame. One possible use of this capability is to show specially created source content to
be used on a rectangular display without distortion:
Original
‘Pillarbox’ Source
Original
‘Letterbox’ Source
Viewported
for a 1 x 4 Display
Viewported
for a 4 x 1 Display