參數(shù)資料
型號(hào)： GM2121
廠商： Electronic Theatre Controls, Inc.
英文描述： SXGA LCD Monitor Controller with Integrated Analog Interface and Dual LVDS Transmitter
中文描述： SXGA液晶顯示器控制器集成模擬接口和雙路LVDS發(fā)送器
文件頁(yè)數(shù)： 29/51頁(yè)
文件大?。?/td> 489K
代理商： GM2121
gm2121 Preliminary Data Sheet
4.5.6 Input Pixel Measurement
C2121-DAT-01F
29
December 2002
http://www.genesis-microchip.com
The gm2121 provides a number of pixel measurement functions intended to assist in configuring system
parameters such as pixel clock, SDDS sample clocks per line and phase setting, centering the image, or
adjusting the contrast and brightness.
4.5.7 Image Phase Measurement
This function measures the sampling phase quality over a selected active window region. This feature
may be used when programming the source DDS to select the proper phase setting. Please refer to the
gm2121 Programming Guide for the optimized algorithm.
4.5.8 Image Boundary Detection
The gm2121 performs measurements to determine the image boundary. This information is used when
programming the Active Window and centering the image.
4.5.9 Image Auto Balance
The gm2121 performs measurements on the input data that is used to adjust brightness and contrast.
4.6 RealColor
TM
Digital Color Controls
The gm2121 provides high-quality digital color controls. These consist of a subtractive "black level"
stage, followed by a full 3x3 RGB matrix multiplication stage, followed by a signed offset stage as shown
in Figure 19.
Subtractive
Offset
(Black Level)
3x3 Color
Conversion
Additive
Offset
(Brightness)
+/
-
-
-
-
+/
-
+/
-
X
Red In
Green In
Blue In
Red Out
Green Out
Blue Out
Figure 19.
RealColor
TM
Digital Color Controls
This structure can accommodate all RGB color controls such as black-level (subtractive stage), contrast
(multiplicative stage), and brightness (signed additive offset). In addition, it supports all YUV color
controls including brightness (additive factor applied to Y), contrast (multiplicative factor applied to Y),
hue (rotation of U and V through an angle) and saturation (multiplicative factor applied to both Y and V).
To provide the highest color purity all mathematical functions use 10 bits of accuracy. The final result is
then dithered to eight or six bits (as required by the LCD panel).
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