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9. Image
9.3.7.1
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 9-27 , 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
this
black 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 9-28
B
Black level
0.7V
Image 9-27
Black level
Δ
G
ΔΒ
Δ
R
R
G
B
Image 9-28
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
Δ
R
ADC
0
255
i1 : superfluous information
i2 : video information
Image 9-29
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.
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R5905032 HDX SERIES 01/06/2011
Содержание HDX series
Страница 1: ...HDX series Installation manual R5905032 00 01 06 2011 ...
Страница 4: ......
Страница 28: ...2 General 24 R5905032 HDX SERIES 01 06 2011 ...
Страница 76: ...5 Getting started 5 8 Projector Address 72 R5905032 HDX SERIES 01 06 2011 ...
Страница 80: ...5 Getting started 76 R5905032 HDX SERIES 01 06 2011 ...
Страница 88: ...6 Quick set up adjustment 84 R5905032 HDX SERIES 01 06 2011 ...
Страница 109: ...8 Input Image 8 15 Main window Image 8 16 Input native resolution R5905032 HDX SERIES 01 06 2011 105 ...
Страница 116: ...8 Input 112 R5905032 HDX SERIES 01 06 2011 ...
Страница 129: ...9 Image 9 3 7 Input Balance R5905032 HDX SERIES 01 06 2011 125 ...
Страница 137: ...9 Image 9 5 Timings R5905032 HDX SERIES 01 06 2011 133 ...
Страница 141: ...9 Image 9 6 Image File Services R5905032 HDX SERIES 01 06 2011 137 ...
Страница 154: ...9 Image 150 R5905032 HDX SERIES 01 06 2011 ...
Страница 178: ...10 Layout 174 R5905032 HDX SERIES 01 06 2011 ...
Страница 215: ...12 Alignment 12 14 Scenergix R5905032 HDX SERIES 01 06 2011 211 ...
Страница 228: ...12 Alignment 224 R5905032 HDX SERIES 01 06 2011 ...
Страница 259: ...13 Projector Control 13 8 Buttons Overview Standby button Shortcut keys R5905032 HDX SERIES 01 06 2011 255 ...
Страница 268: ...14 Service Image 14 3 Identification 2 Use the or key to scroll through the menu 264 R5905032 HDX SERIES 01 06 2011 ...
Страница 271: ...14 Service Image 14 7 Diagnosis versions list R5905032 HDX SERIES 01 06 2011 267 ...
Страница 275: ...14 Service Image 14 20 Lamp power supply logging R5905032 HDX SERIES 01 06 2011 271 ...
Страница 278: ...14 Service Image 14 28 Notification overview list 274 R5905032 HDX SERIES 01 06 2011 ...
Страница 298: ...15 Maintenance 294 R5905032 HDX SERIES 01 06 2011 ...
Страница 302: ...16 Servicing Image 16 4 Lamp house removal 298 R5905032 HDX SERIES 01 06 2011 ...
Страница 305: ...16 Servicing 1 Image 16 7 Front cover removal 4 Take off the front cover R5905032 HDX SERIES 01 06 2011 301 ...
Страница 307: ...16 Servicing Image 16 9 Mount dust ring 4 Mount lens again R5905032 HDX SERIES 01 06 2011 303 ...
Страница 312: ...16 Servicing 308 R5905032 HDX SERIES 01 06 2011 ...
Страница 313: ...A Dimensions A DIMENSIONS Overview Dimensions of a HDX projector R5905032 HDX SERIES 01 06 2011 309 ...
Страница 315: ...B Specifications B SPECIFICATIONS R5905032 HDX SERIES 01 06 2011 311 ...
Страница 316: ...B Specifications 312 R5905032 HDX SERIES 01 06 2011 ...
Страница 321: ...C Standard source files C STANDARD SOURCE FILES R5905032 HDX SERIES 01 06 2011 317 ...
Страница 322: ...C Standard source files 318 R5905032 HDX SERIES 01 06 2011 ...
Страница 326: ...C Standard source files 322 R5905032 HDX SERIES 01 06 2011 ...
Страница 327: ...D DMX chart D DMX CHART Overview DMX chart Basic DMX chart Full DMX chart Extended R5905032 HDX SERIES 01 06 2011 323 ...
Страница 338: ...E Stacking HDX projectors 334 R5905032 HDX SERIES 01 06 2011 ...
Страница 339: ...F Environmental information F ENVIRONMENTAL INFORMATION R5905032 HDX SERIES 01 06 2011 335 ...
Страница 340: ...F Environmental information 336 R5905032 HDX SERIES 01 06 2011 ...
Страница 344: ...F Environmental information 340 R5905032 HDX SERIES 01 06 2011 ...
Страница 350: ...Index 346 R5905032 HDX SERIES 01 06 2011 ...