Barco R9004460, Руководство пользователя

Страница: 65 / 133

6. Adjustment Mode
4. Press EXIT to return to the
Picture Tuning
menu.
PICTURE TUNING
COLOR SPACE
COLOR TEMPERATURE
GAMMA
NOISE REDUCTION
INPUT BALANCE
Select with
↑
or
↓
then <ENTER>
<EXIT> to return
Menu 6-35
6.4.5 Noise Reduction
Purpose
Reduces noise and pixel jitter in all video and data sources
Changing the noise reduction value.
1. Push the cursor key ↑ or ↓ to highlight
Noise Reduction
. (menu 6-36)
2. Press ENTER to select.
3. Change the value by pushing the cursor key ← or → until the desired noise level is reached.
4. Press EXIT to return the
Picture Tuning
menu.
PICTURE TUNING
COLOR SPACE
COLOR TEMPERATURE
GAMMA
NOISE REDUCTION
INPUT BALANCE
Select with
↑
or
↓
then <ENTER>
<EXIT> to return
Menu 6-36
6.4.6 Input Balance
Overview
• Introduction to Input Balance
• Adjusting the input balance
• Input balance for YUV signals
6.4.6.1 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 6-4 , 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 6-5
R59770014 XLM HD30 07/07/2006 61