980 DP Video Generator - User Guide Rev. A4
Page 360 July 14, 2014
11.160 SMPTE133
11.160.1 Description
This image is based on a recommended practice (RP-133) test pattern designed by the Society of Motion Picture
and Television Engineers (SMPTE). The original application was used in testing and evaluating medical imaging
monochrome displays. The image now is used in many different display applications. The image is self-scaling as
to the number of active pixels and active lines used. Some of the image’s elements have minor differences from the
original SMPTE specification.
These differences are noted in descriptions of the individual elements.
The image is drawn on a reference background having a 50% intensity level. The background covers the
entire active video area.
Crosshatch – There are 10 boxes vertically. The number of horizontal boxes is based on the physical aspect ratio
determined by the HSIZ and VSIZparameters in the currently loaded format. The boxes are perfectly square with
any fractional spaces placed around the outside edges of the image. The vertical lines are two (2) pixels thick while
the horizontal lines are two (2) scan lines thick. Small crosses indicate the intersection of the horizontal and vertical
lines when they are covered by other parts of the image. All parts of the crosshatch are normally drawn using a
70% intensity level. A 75% level is used in the secondary version.
Resolution patch – The patch is made up of six (6) smaller boxes that are each about 6.25% of the height of the
display. The boxes are made of alternating intensity (0 and 100%) stripes. The stripes run vertically and
horizontally. The stripes may be one (1), two (2) or three (3) pixels wide each. Details of the patch are shown in the
lower half of the following illustration. The patches are located in each corner of the main image and in the center.
They are oriented with the highest resolution and contrast boxes closest to the outside corners. The 48%-53%,
48%-51% and 50%-51% level patches are omitted in the secondary version.
Grayscale boxes – Twelve (12) boxes at eleven (11) intensity levels are clustered around the center of the main
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