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SAA7115 View Datasheet(PDF) - Philips Electronics

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SAA7115 Datasheet PDF : 214 Pages
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Philips Semiconductors
CS-PD Hamburg
CVIP2
Datasheet
SAA7115
Date:
Version:
10/23/01
0.67
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 pagewi+d2th55
+235
white
+255
+240
+212
blue 100%
blue 75%
+255
+240
+212
red 100%
red 75%
+128 LUMINANCE 100%
+16
black
0
+128
colourless
CB- COMPONENT
+128
colourless
CR- COMPONENT
+44
yellow 75%
+44
+16
yellow 100%
+16
0
0
cyan 75%
cyan 100%
MHB730
a. Y output range.
b. CB output range.
c. CR 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-CB-CR levels via BCS control I2C-bus bytes DBRI, DCON and DSAT.
Luminance: YOUT = Int D-----C-6---O8-----N--- × (Y 128) + DBRI
Chrominance: (CRCB)OUT = Int D-----S6---4-A----T-- × (CR, CB 128) + 128
It should be noted that the resulting levels are limited to 1 to 254 in accordance with “ITU Recommendation 601/656”.
Fig.18 Y-CB-CR range for scaler input and X-port output.
Confidential - NDA required
Filename: SAA7115_Datasheet.fm
page 38
Last edited by H. Lambers
 

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