Barco Projector Cineversum 110 User Manual

							8. Image Menu
One can conclude here that a good color tracking can only be met by using three previously (input) balanced
color signals
Analog Digital Conversion
The analog color signals must pass through an Analog/Digital conversion circuit prior to any digital processing in the PMP.
A typical ADC transforms the analog value into an 8 bit coded digital signal.
The graphic shows that when converting a signal containing a DC offset component the range of the converter is not optimally used.
Black level∆
R
ADC
0 255i1 : superfleous information i2 : video information
Image 8-30
One can conclude here that a good data conversion can only be met by using three previously (input) balanced
color signals
The objective of input balancing
The objective in input balancing is to “set” the same black level and the same white level for the three colors of a particular input
source.
Black level setting : brightness
White level setting : contrast
The same absolute black and white level for the three colors allow the same reference for Brightness and contrast control of the
picture !
These two references also set the range in which the ADC will work for that particular source (this explains also why each input
balance setting is linked to a particular source and thus saved in the image file).
8.8.2 Adjusting the input balance
How can it be done ?
To balance the three color signals of a particular source there are conditions; in fact we must know the black and the white level of
the source i.e. :
1. The source in question must be able to generate a white signal, ideally a 100% white (background) full screen pattern
2. The source in question must be able to generate a black signal, ideally a 100% black (background) full screen pattern
AB
Image 8-31
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							8. Image Menu
White balance : In the projector, we will set the contrast for each color until we get a 100% light output picture when projecting a
100% white image (image A)
Black balance : In the projector, we will set the brightness for each color until we get a 0% light output picture when projecting a
100% black image (image B).
The changeover from min to max is indicated by the apparition of bright spots also called “digital noise”
An alternative to a full screen White/black pattern is the standard gray scale pattern, the white bar will be used
for white balance and the black bar for black balance.
Image 8-32
Black balance
1. PressMENUto activate the menu bar.
2. Press→to select theImageitem.
3. Press↓to pull down theImagemenu.
4. Use↑or↓to selectInput balance.
5. Press→to pull down the menu.
6. Use↓or↑to selectBlack balance.(image 8-33)
7. Adjust the red black level on a minimal value (image 8-34, image 8-35)
8. Adjust the blue black level on a minimal value
Note:This minimal value is not necessary , provided that the 2 other colors are not influencing too much the color to be adjusted,
in fact the aim is to minimize the effect of the two other colors since there is a risk of reaching too soon the 50% transition
due to the contribution of these two other colors signals.
9. Adjust the Green black level until bright spots appear on the screen.
10.Adjust the Blue black level until bright spots appear on the screen.
11. Adjust the Red black level until bright spots appear on the screen.
The projected image should now be noisy full black
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							8. Image Menu
Image 8-33
Input black balance Red
20
0
127
Image 8-34
Change color between Red Green and Blue with Image 8-35
If one uses a gray scale pattern, the bright spots should appear in the black bar.
Performing White input balance
1. Connect the source you want to project.
2. Select a white pattern (or gray scale as alternative).
3. PressMENUto activate the menu bar.
4. Press→to select theImageitem.
5. Press↓to pull down theImagemenu.
6. Use↑or↓to selectInput balance.
7. Press→to pull down the menu.
8. Use↓or↑to selectWhite balance.(image 8-36)
9. Adjust the Red white level (gain) on a minimal value. (image 8-37)
10.Adjust the blue white level (gain) on a minimal value
Note:This minimal value is not necessary , provided that the 2 other colors are not influencing too much the color to be adjusted,
in fact the aim is to minimize the effect of the two other colors since there is a risk of reaching too soon the transition
(bright spots) due to the contribution of these two other colors signals.
11. Adjust the Green white level (gain) until bright spots appear on the screen
12.Adjust the Blue white level (gain)until bright spots appear on the screen
13.Adjust the Red white level (gain) until bright spots appear on the screen
The projected image should now be noisy neutral grey.
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							8. Image Menu
Image 8-36
Input white balance Red
50
0
127
Image 8-37
If one uses a gray scale pattern, the bright spots should appear in the white bar.
SelectingPresetrestores the factory input balance setting
8.8.3 Input balance for YPrPb signals
Remark on the input balance of a component video source
Before starting the Input Balance procedure, generate a signal with dominant white parts.
Input balance is also available for a component video source under following conditions:
• A component video signal is present on the BNC’s.
• ”Data on BNC’s” is selected in theSource selection menu.
• Pr/Y/Pb is selected in the Advanced menu of the corresponding image file.
The procedure is the same as for a data source except:
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							8. Image Menu
• The white balance happens only on Green.
Adjust until bright spots appear in the image.
Image 8-38
• The black balance happens on the three colors.
The PR and PB connector have to be removed from the input.
Adjust until noise appears in the image.
Image 8-39
8.9 AGC on Video
AGC
Automatic Gain Control: allows an automatic amplitude (gain) control of the incoming video signal
AGC is only for Video signals.
Enabling/disabling the AGC
1. PressMENUto activate the menu bar.
2. Press→to select theImageitem.
3. Press↓to pull down theImagemenu.
4. Use↑or↓to selectAGC on Video.
5. Press→to pull down the menu.
6. Use↓or↑to enable or disable the AGC.
7. PressENTERto confirm. (image 8-40)
A white bullet shows the active setting.
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Image 8-40
The AGC can be disturbing in case of Macrovision encoded signals, therefore the AGC can be disabled (OFF)
at any time
8.10 Manual Gain Control
What can be done ?
WhenAGC on Videois disabled, the gain of the incoming video signal can be set manually. The manual gain control must be done
on an external pattern with white areas (grey scale bar pattern).
How to set the Manual Gain Control ?
1. PressMENUto activate the menu bar.
2. Press→to select theImageitem.
3. Press↓to pull down theImagemenu.
4. Use↑or↓to selectManual Gain Control.(image 8-41)
5. PressENTERto confirm.
A scroll bar is displayed. (image 8-42)
6. Use←or→to adjust the gain so that uniform white parts in the image are obtained.
Or,
use the numeric keys to enter the desired value.
Image 8-41
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							8. Image Menu
Manual Gain Control on Video
278
0
512
Image 8-42
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							9. Tools Menu
9. TOOLS MENU
Overview
• Overview of the Tools menu
• Introduction to PiP
• PiP select
• PiP add window
• PiP remove window
• PiP layout
•PiPAdjust
9.1 Overview of the Tools menu
Overview
• PiP select
- Full-screen
-2by2raster
- PiP layout 1
- PiP layout 2
- PiP layout 3
• PiP add window...
• PiP remove window...
• PiP layout
-Save
-Saveas
- Rename
-Delete
• PiP adjust
9.2 Introduction to PiP
PiP
PiP stands for Picture in Picture and allows to display multiple windows containing each of them an image. The
windows may be of the video or data type.
What are the different possibilities within the PiP mode ?
The input section of the CineVERSUM™ 110 projector allows a multitude of combinations of different input signals which may be
projected in the 4 windows of the PiP screen.
The PiP mode allows independent settings for each window:
• Image settings : contrast, brightness, tint, color, ...
• Vertical and horizontal shift of each window all over the screen
• Re-sizing of the window
• Digital Zoom
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							9. Tools Menu
The different PiP configurations
• Full screen2
The full screen is used to display one of the selected sources.
Browse through the sources with thePiP Adjustbutton on the remote control.
•2-by-2raster
2
The screen is divided into 4 subscreens containing 1 Video, 2 Data sources and 1 SDI source.
Image 9-1
• PiPlayout1to33
These are factory layouts, they can be edited and saved.
• Personal layouts
Beside the 2 fixed layouts and the 3 factory layouts, you can create 5 additional (personal) layouts.
2. fixed layout
3. factory layouts
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