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
255
i1 : 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
A
B
Image 8-31
R5976697 CINEVERSUM™ 110 12/05/2004
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Summary of Contents for CineVERSUM 110
Page 1: ...CineVERSUM 110 Owner s Manual R9010120 R5976697 01 12 05 2004 ...
Page 4: ......
Page 8: ...Table of contents 4 R5976697 CINEVERSUM 110 12 05 2004 ...
Page 23: ...2 Installation Guidelines Image 2 11 Battery removal R5976697 CINEVERSUM 110 12 05 2004 19 ...
Page 24: ...2 Installation Guidelines 20 R5976697 CINEVERSUM 110 12 05 2004 ...
Page 36: ...3 Connections 32 R5976697 CINEVERSUM 110 12 05 2004 ...
Page 48: ...4 Getting Started 44 R5976697 CINEVERSUM 110 12 05 2004 ...
Page 52: ...5 Getting used with the Menu structure 48 R5976697 CINEVERSUM 110 12 05 2004 ...
Page 58: ...6 Source Selection 54 R5976697 CINEVERSUM 110 12 05 2004 ...
Page 62: ...7 General Menu 58 R5976697 CINEVERSUM 110 12 05 2004 ...
Page 88: ...8 Image Menu 84 R5976697 CINEVERSUM 110 12 05 2004 ...
Page 98: ...9 Tools Menu 94 R5976697 CINEVERSUM 110 12 05 2004 ...
Page 116: ...12 Image Files Menu 112 R5976697 CINEVERSUM 110 12 05 2004 ...
Page 124: ...13 Display Setup 120 R5976697 CINEVERSUM 110 12 05 2004 ...
Page 133: ...14 Installation menu Image 14 21 R5976697 CINEVERSUM 110 12 05 2004 129 ...
Page 134: ...14 Installation menu 130 R5976697 CINEVERSUM 110 12 05 2004 ...
Page 146: ...A Standard Image Files 142 R5976697 CINEVERSUM 110 12 05 2004 ...
Page 152: ...Index 148 R5976697 CINEVERSUM 110 12 05 2004 ...