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980 DP 1.4 Video Generator / Analyzer - User Guide Rev. A1
Page 479 June 16, 2017
image. They start at 0% and increase in 10% steps to100% with two (2) boxes at a 50% level. All of the
grayscale boxes are omitted in the secondary version.
Gamma check dither box
– A small box is drawn inside the right-hand 50% grayscale box. The box is half the
width and height of the larger box. The box consists of a checkerboard of alternate one-on and one-off pixels. The
alternate pixels have levels of 0 and 100%. This smaller box is not part of the original SMPTE specification and is
omitted in the secondary version.
Contrast boxes
– Two (2) boxes are drawn adjacent to the grayscale boxes. They are at 0 and 100% levels.
There are smaller boxes drawn inside each box at 5 and 95% levels. The contrast boxes are omitted in the
secondary version.
Black and white windows
– Two (2) horizontal bars are located above and below the grayscale boxes. Their
height equals 8% of the display height. There are half-size bars centered in the larger bars. In the primary version,
the dark portion of the windows is at a 5% level and the bright portion is at a 95% level. Zero and 100% levels are
used in the secondary version.
Border
– A border line is drawn around the image. It is set in from the edges of displayed video a distance
equal to 1% of the displayed height and has a thickness equal to 0.5% of the displayed height. The intensity
level is the same as that of the crosshatch lines.
Circle
– A large circle is centered in the image. It touches the top and bottom of the active video area when the
aspect ratio is wider than it is high (landscape-type display). The circle touches the left and right sides of active
video when the aspect ratio is taller than it is wide (portrait-type display). The intensity level is the same as that of
the crosshatch lines. The circle is not part of the original SMPTE specification.
Resolution data - The number of active pixels per line and the number of active lines is shown as text below the
lower black and white window. The pixel depth also is shown. The intensity level of the text is the same as that of
the crosshatch lines. The displaying of the data is not part of the original SMPTE specification.
The secondary version adds a row of six (6) color bars above and below the black-and-white windows. The order of
the colors, from left to right, is red, green, blue, cyan (g+b), magenta (r+b) and yellow (r+g). The top row is drawn at
100% intensity levels and the bottom row is drawn at 50% intensity levels. Color bars are not part of the original
SMPTE specification.
16.160.2 Test
Deflection linearity.
16.160.3 Method
If the overall height and width of the display
’s active video area match the sizes in the format, the large circle should
be perfectly round. Each box in the crosshatch pattern should be the same size and shape.
16.160.4 Test
High contrast resolution.
16.160.5 Method
All the 0 and 100% level stripes in all the resolution patches should be separate and distinct.
16.160.6 Test
Low contrast resolution and noise.