SAA7109 PHILIPS [NXP Semiconductors], SAA7109 Datasheet - Page 60

• Manufacturer Part Number: SAA7109
• Description: PC-CODEC
• Manufacturer: PHILIPS [NXP Semiconductors]

Philips Semiconductors
9.1.3.3
The resulting Y (CVBS) and C
2004 Mar 16
handbook, full pagewidth
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
PC-CODEC
“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
Luminance:
Chrominance:
It should be noted that the resulting levels are limited to 1 to 254 in accordance with “ITU Recommendation 601/656” .
Brightness Contrast Saturation (BCS) control and decoder output levels
B
C
255
235
128
Y
-C
16
R
OUT
0
C
a. Y output range.
R
B OUT
or CVBS to the values 1 (minimum) and 254 (maximum) to fulfil “ITU Recommendation 601/656” .
=
LUMINANCE 100%
Int
=
DCON
---------------- -
Int
68
DSAT
--------------- -
64
B
B
Fig.25 Y-C
-C
-C
Y 128
R
R
–
white
black
levels via BCS control I
signals are fed to the BCS block, which contains the following functions:
C
R
C
B
+
–
DBRI
128
B
-C
255
240
212
128
44
16
0
R
+
range for scaler input and X port output.
128
C B -COMPONENT
b. C
2
C-bus bytes DBRI, DCON and DSAT.
B
output range.
60
colourless
blue 100%
yellow 75%
yellow 100%
blue 75%
255
240
212
128
44
16
0
SAA7108E; SAA7109E
c. C
C R -COMPONENT
R
output range.
colourless
red 100%
red 75%
cyan 75%
cyan 100%
Product specification
MHB730