Setting The Aspect Ratio Of The Output Picture - evertz 7700 Manual

6.4.1. Setting the Aspect Ratio of the Output Picture

Output Picture
Aspect Ratio
16:9 Letterbox
4:3 Side Cut
4:3 Squeeze
14:9 Letterbox
13:9 Letterbox
SDTV monitors are usually 4:3, so there is a need for some simple aspect
ratio conversion from the HDTV 16:9 format. With this control, you can set
the aspect ratio of the output Picture.
When we display a 16:9 picture on a 4:3 (12:9) monitor, the picture
becomes anamorphic (4:3 squeeze) resulting in tall thin people. To correct
this problem, we have a choice of cropping the edges (4:3 side cut) or
making the whole picture smaller (16:9 letter box).
letterbox solutions are a compromise where the picture is larger than 16:9
letterbox and less of the edges are cropped than 4:3 side cut.
The anamorphic solution uses all the horizontal lines of the 4:3 raster.
Clipping discards video information at the start and end of each line. For the
letter box solution, we have to re-map the picture to occupy less lines. The
unused lines are left black at the top and bottom of the picture.
Figure 8 shows the various output aspect ratios available.
Revision 1.2
7712HDC HD Broadcast Quality Down Converter
7700 MultiFrame Manual
The 14:9 and 13:9
7712HDC-19