The Uniqueness Of X-Algorithm - Sony LUMA Product Information Manual

Professional lcd monitors
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5
LUMA monitors in professional applications

The uniqueness of X-Algorithm

As explained above, when an interlace SD signal
is displayed on a high-resolution LUMA Series
LCD panel, X-Algorithm is used to interpolate
absent scanning lines for moving picture areas.
In general, video signals with busy picture content
can have abrupt changes in the horizontal,
Field(n)
Figure 5-3 'Liniar imterpolation' and 'pixel copying' in X-Algorithm
1. Accurate detection of motion or still content
To obtain the best I/P conversion results, line
interpolation should be used for moving
picture content only, while for still picture
content, pixels should be simply copied from
the preceding field. Simply put, extremely
accurate judgment between motion and still
picture content is required.
In X-Algorithm, a larger number of preceding
fields are examined and compared to
analyze whether the I/P conversion for a
given field should operate in motion or still
mode. When motion mode is selected, an
intelligent line interpolation method - unique
to X-Algorithm - is used.
2. More variations of line interpolation
When line interpolation is used, the key to
creating an accurate pixel depends on
which existing pixels are used to calculate
the absent pixel.
As shown in Figure 5-3, X-Algorithm selects
the best combination of pixel pairs along
seven different directions to calculate the
missing data.
24
Product Information Manual Sony Professional LCD Monitors
Moving pixel
vertical, or diagonal directions. This can have a
critical effect on interpolation accuracy.
Compared to other interpolation methods, X-
Algorithm keeps this effect to a minimum through
the use of highly advanced and unique
technology in its three core processes:
Still pixel
Field(n-1)
Field(n)
Field(n+1)
This allows absent pixels to be accurately
calculated for any type of picture content,
including images with diagonal moving
edges, which can be a challenge for other
I/P algorithms.
3. More advanced image analysis for choosing the
correct interpolation direction
To take full advantage of the seven line
interpolation combinations, correct analysis
of the surrounding picture content is
required.
X-Algorithm carefully examines a larger area
of the picture content surrounding the
absent pixels and makes the best selection
from the seven interpolation choices.

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