參數(shù)資料
型號: SAA7114H
廠商: NXP SEMICONDUCTORS
元件分類: 顏色信號轉(zhuǎn)換
英文描述: PAL/NTSC/SECAM video decoder with adaptive PAL/NTSC comb filter, VBI data slicer and high performance scaler
中文描述: COLOR SIGNAL DECODER, PQFP100
封裝: 14 X 14 MM, 1.40 MM HEIGHT, PLASTIC, MS-026, SOT407-1, LQFP-100
文件頁數(shù): 32/147頁
文件大?。?/td> 759K
代理商: SAA7114H
2004 Mar 03
32
Philips Semiconductors
Product specification
PAL/NTSC/SECAM video decoder with adaptive PAL/NTSC
comb filter, VBI data slicer and high performance scaler
SAA7114
8.1.3.3
Brightness Contrast Saturation (BCS) control and decoder output levels
The resulting Y (CVBS) and C
B
-C
R
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-C
B
-C
R
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
+
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.18 Y-C
B
-C
R
range for scaler input and X port output.
a. Y output range.
b. C
B
output range.
c. C
R
output range.
“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-C
B
-C
R
levels via BCS control I
2
C-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-----68
Y
128
(
)
×
DBRI
+
=
C
R
C
B
(
)
OUT
Int---64
C
R
C
B
,
128
(
)
×
128
+
=
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