參數(shù)資料
型號： 935273916557
廠商： NXP SEMICONDUCTORS
元件分類： 顏色信號轉換
英文描述： COLOR SIGNAL DECODER, PBGA156
封裝： 15 X 15 MM, 1.15 MM HEIGHT, PLASTIC, MS-034, SOT-472-1, BGA-156
文件頁數(shù)： 107/178頁
文件大?。?/td> 988K
代理商： 935273916557
2004 Jul 22
34
Philips Semiconductors
Product specication
Multistandard video decoder with adaptive
comb lter and component video input
SAA7118
8.1.2.3
Brightness Contrast Saturation (BCS) control and decoder output levels
The resulting Y (CVBS) and CB-CR signals are fed to the BCS block, which contains the following functions:
Chrominance saturation control by DSAT7 to DSAT0
Luminance contrast and brightness control by DCON7 to DCON0 and DBRI7 to DBRI0
Raw data (CVBS) gain and offset adjustment by RAWG7 to RAWG0 and RAWO7 to RAWO0
Limiting Y-CB-CR or CVBS to the values 1 (minimum) and 254 (maximum) to fulfil “ITU Recommendation 601/656”.
handbook, full pagewidth
LUMINANCE 100%
+255
+235
+128
+16
0
white
black
CB-COMPONENT
+255
+240
+212
+128
+16
+44
0
blue 100%
blue 75%
yellow 75%
yellow 100%
colourless
CR-COMPONENT
+255
+240
+128
+16
+44
0
red 100%
red 75%
cyan 75%
cyan 100%
colourless
MHB730
Fig.19 Y-CB-CR range for scaler input and X port output.
“ITU Recommendation 601/656” digital levels with default BCS (decoder) settings DCON[7:0] = 44H, DBRI[7:0] = 80H and DSAT[7:0] = 40H.
Equations for modification to the Y-CB-CR levels via BCS control I2C-bus bytes DBRI, DCON and DSAT.
Luminance:
Chrominance:
It should be noted that the resulting levels are limited to 1 to 254 in accordance with “ITU Recommendation 601/656”.
Y
OUT
Int
DCON
68
-----------------
Y
128
–
()
×
DBRI
+
=
C
R CB
()
OUT
Int
DSAT
64
----------------
C
R CB
,
128
–
()
×
128
+
=
a. Y output range.
b. CB output range.
c. CR output range.
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