DVDO iScan VP20 Owner's Manual page 37

1-Pixel Checkerboard
This test pattern consists of a 1-pixel black and white checkerboard. The test pattern alternates black
and white pixels in both the vertical and the horizontal direction. This pattern is useful for exactly
matching the iScan's output resolution to that of the display to achieve 1:1 pixel mapping and bypass
any scaling operation which may be incorporated in the display.
1-Pixel Vertical Lines
This test pattern consists of an alternating series of 1-pixel black and white vertical lines. The test
pattern alternates black and white pixels in only the horizontal direction. This pattern is useful
for exactly matching the iScan's output resolution to that of the display in order to achieve 1:1 pixel
mapping and bypass any scaling operation which may be incorporated in the display. its use is similar
to that of the 1-pixel checkerboard, but it operates only in the horizontal direction.
1-Pixel Horizontal Lines
This test pattern consists of an alternating series of 1-pixel black and white horizontal lines. The
test pattern alternates black and white pixels in only the vertical direction. This pattern is useful for
exactly matching the iScan's output resolution to that of the display to achieve 1:1 pixel mapping
and bypass any scaling operation which may be incorporated in the display. its use is similar to that
of the 1-pixel checkerboard, but it operates only in the vertical direction. This pattern is blacked-out
for the 1080i output resolution due to the severe flicker it causes on some displays.
Judder
This test pattern consists of a vertical bar which moves slowly back and forth across the screen.
The bar's motion is updated once in each output frame period of the iScan, and it moves a fixed
number of pixels horizontally in each frame period. This moving bar test pattern is intended to
identify the frame rates at which a display will operate. if the display is not performing any frame
rate conversion, i.e., it is actually displaying the output frame rate of the iScan — the motion will
be very smooth. However, if the display is performing any type of frame rate conversion there will
be very noticeable stutter introduced in the smooth motion. There may also be other objectionable
artifacts introduced depending on how the display actually performs the conversion. These include
tearing (top and bottom portion of the bar are horizontally misaligned) and distortion.
75% Color Bars
This is a standard full-height color bar pattern. There are 7 vertical bars across the screen at a
75% saturation level. From left to right the bars are white, yellow, cyan, green, magenta, red, blue,
and black.
100% Color Bars
This is a standard full-height color bar pattern. There are 7 vertical bars across the screen at a 00%
saturation level. From left to right the bars are white, yellow, cyan, green, magenta, red, blue, and
black.
Gray Ramp
This test pattern is a horizontal gray ramp. There is a black level (0 IRE) vertical bar along the
left of the pattern and a white level (100 IRE) vertical bar along the right side of the pattern.
between the two bars is a monotonic gray ramp which ranges from the minimum luminance level
(i.e., blacker than black) at the left to the maximum luminance level (i.e., whiter than white) at the
right. The minimum level of the ramp is a 10-bit digital value of 4 (equivalent to an 8-bit value of 1);
the maximum level of the ramp is a 10-bit value of 1020 (equivalent to an 8-bit value of 254).
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