DVIPRO1000
8x2 UNIVERSAL SCALER MATRIX SWITCHER
& EFFECT CONTROL
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ELPRO Video Labs s.r.l.
St.da della Pronda, 45/B 10142 Torino ITALY
Tel.+39 0117701583 – Fax +39 011703751
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7.5 OVERLAY. Overlay Menu
This menu can be used to set certain parameters for Overlay functioning in
“User Mode”: the other 4 modes are predefined on the DVIPRO1000 and
cannot be modified (see par 6.1.5).
The modifiable parameters are the transparency intervention thresholds of
the three basic colors (RGB) and the type of overlay mask. In particular, there
are 4 types of Overlay Mode:
1) BELOW / AND: in this mode, all the pixels of the PIP image having all
three colors RGB above the threshold set are made transparent
2) ABOVE / OR: in this mode, all the pixels of the PIP image having at
least one of the three colors RGB below the threshold set are made
transparent
3) BELOW / OR: in this mode, all the pixels of the PIP image having at
least one of the three colors RGB above the threshold set are made
transparent
4) ABOVE / AND: in this mode, all the pixels of the PIP image having all
three colors RGB below the threshold set are made transparent
Example 1:
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to obtain a white character titling function, use a PIP image with
black background and set the DVIPRO1000 as “ABOVE / OR”
