Barco Rlm R6+ Performer Owners Manual

							8. Image Menu
A white bullet shows the active setting.
Image 8-25
How to change the custom color space ?
1. PressMENUto activate the menu bar.
2. Press→to select theImageitem. (image 8-26)
3. Press↓to pull down theImagemenu.
4. Use↑or↓to selectColor space.
5. Press→to pull down the menu.
6. Use↓or↑to select theCustom.
7. PressENTER.
A slide box for Red x-coordinate will be displayed as well as a wizard text box in the lower part of the screen. (image 8-27)
Adjust first Red x to the desired value. UseCOLORto switch to the next adjustment. The adjustment order is Red x→Red y
→Green x→Green y→Blue x→Blue y.
Image 8-26
Red x
200
0
1000
Image 8-27
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							8. Image Menu
the x and y coordinate changes between 0.00 and 1.00. For practical reasons, the values on the slider box are
multiplied by 1000.
8.8 Filmmode detection
What can be done ?
Some sources like common DVD material are derived from cinema 24 Hz sources (2/2 or 3/2 pull down method).
The filmmode detection insures that these converted signals are shown without artefacts.
This function may cause undesired effects on standard sources, therefore it can be disabled (OFF) at any time
2:2 pull-down
The process of transferring 24-frames/sec film format into video by repeating each frame (used for PAL DVD’s) as two
video fields. ( AD )
3:2 pull-down
Method used to map the 24 fps of film onto the 30 fps (60 fields) or 25 fps (50 fields), so that one film frame occupies
three video fields, the next two, etc. It means the two fields of every other video frame comefrom different film frames
making operations such as rotoscoping impossible, and requiring care in editing. Some sophisticated equipment can
unravel the 3:2 sequence to allow frame-by-frame treatment and subsequently re-compose 3:2. The 3:2 sequence
repeats every five video frames and four film frames, the latter identifiedas A-D. Only film frame A is fully on a video
frame and so exists at one time code only, making it the editable point of the video sequence.
Artefacts
Undesirable elements or defects in a video picture. These may occur naturally in the video process and must be
eliminated in order to achieve a high-quality picture. Most common in analog are cross color and cross luminance.
Most common in digital are macroblocks, which resemble pixelation of the video image.
Enabling/disabling the filmmode detection
1. PressMENUto activate the menu bar.
2. Press→to select theImageitem. (image 8-28)
3. Press↓to pull down theImagemenu.
4. Use↑or↓to selectFilmmode detection.
5. Press→to pull down the menu.
6. Use↓or↑to enable or disable the Filmmode detection.
7. PressENTER.
A white bullet shows the active setting.
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							8. Image Menu
Image 8-28
8.9 Blanking
What can be done ?
Blanking adjustments affect only the edges of the projected imageand are used to frame the projected image on the screen and to
hide or black out unwanted information (or noise). A ’0’ indicates no blanking.
Which blanking adjustments are available ?
• top blanking
• bottom blanking
• right blanking
• left blanking
Image 8-29
Blanking
A Top blanking
B Bottom blanking
C Left blanking
D Right blanking
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Adjusting the blanking
1. PressMENUto activate the menu bar.
2. Press→to select theImageitem. (image 8-30)
3. Press↓to pull down theImagemenu.
4. Use↑or↓to selectBlanking.
5. PressENTERto confirm.
The Blanking pop-up menu appears. (image 8-31)
6. Use←or→to selectEnabledorDisabled.
Enabled Blanking adjustment is possible
Disabled Blanking adjustment is not possible
7. Use the↑or↓keys to selectTo p,Bottom,LeftorRightblanking and change the value with←or→until the desired blanking is
obtained.
Or,
use the↑or↓keys to selectTo p,Bottom,LeftorRightblanking and pressENTERto change the value indication to a input field
and enter a new value with the keyboard. PressENTERto accept this value. (image 8-32)
Image 8-30
Image 8-31Image 8-32
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							8. Image Menu
8.10 Input Balance
Overview
• Introduction to Input Balance
• Adjusting the input balance
• Input balance for YPrPb signals
8.10.1 Introduction to Input Balance
Introduction: Unbalanced color signals
When transporting signals, there is always a risk of deterioration of the information contained in the signals.
In case of information contained in the amplitude of the signals which is the case of data color signals (R, G, B),image 8-33 , we are
quite sure that the amplitude of these color signals is subject to alterations.
An example of alteration may be a DC component added to the signal, in the form of a DC offset repositioning the black level, since
thisblack level(“brightness”) will become crucial later on (clamping circuit) it will result in “black not being black”.
Another value that is subject to alteration is the amplitude of the signal, resulting in an altered “Gain” of the signal (“white level”or
contrast).
The alterations of the three color signals will happen independently i.e. the colors will end to be unbalanced, image 8-34
B
Black level
0.7V
Image 8-33
Black level
∆G∆Β
∆R RG
B
Image 8-34
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 8-35
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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).
8.10.2 Adjusting the input balance
How can it be done ?
To balance the three color signals of a particular source there areconditions; 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 8-36
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”
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							8. Image Menu
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 8-37
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 8-38)
7. Adjust the red black level on a minimal value (image 8-39, image 8-40)
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
Image 8-38
Input black balance Red
20
0
127
Image 8-39
Change color between Red Green and Blue with 
Image 8-40
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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 8-41)
9. Adjust the Red white level (gain) on a minimal value. (image 8-42)
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.
Image 8-41
Input white balance Red
50
0
127
Image 8-42
If one uses a gray scale pattern, the bright spots should appear in the white bar.
SelectingPresetrestores the factory input balance setting
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							8. Image Menu
8.10.3 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:
• The white balance happens only on Green.
Adjust until bright spots appear in the image.
Image 8-43
• 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 8-44
8.11 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.
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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 8-45)
A white bullet shows the active setting.
Image 8-45
The AGC can be disturbing in case of Macrovision encoded signals, therefore the AGC can be disabled (OFF)
at any time
8.12 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 8-46)
5. PressENTERto confirm.
A scroll bar is displayed. (image 8-47)
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.
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