SAA7129 Philips Semiconductors, SAA7129 Datasheet - Page 13

• Manufacturer Part Number: SAA7129
• Description: Digital video encoder
• Manufacturer: Philips Semiconductors

Philips Semiconductors
7.10
The SAA7128H; SAA7129H expects digital Y, C
with levels (digital codes) in accordance with
“ITU-R BT.601” .
For C and CVBS outputs, deviating amplitudes of the
colour difference signals can be compensated by
independent gain control setting, while gain for luminance
is set to predefined values, distinguishable for 7.5 IRE
set-up or without set-up.
Table 1 “ITU-R BT.601” signal component levels
Notes
1. Transformation:
2. Representation of R, G and B (or C
Table 2 8-bit multiplexed format (similar to “ITU-R BT.601” )
2000 Mar 08
White
Yellow
Cyan
Green
Magenta
Red
Blue
Black
Sample
Luminance pixel number
Colour pixel number
Digital video encoder
COLOUR
a) R = Y + 1.3707
b) G = Y
c) B = Y + 1.7324
Input levels and formats
TIME
0.3365
235
210
170
145
106
81
41
16
Y
(C
(C
(C
B
R
B
128).
128)
128)
C
0.6982
0
B
R
0
128
166
202
240
128
, Y and C
C
16
54
90
B
0
B
(C
, C
Y0
1
R
B
) at the output is 9 bits at 27 MHz.
R
data
128)
0
128
146
222
240
110
128
C
16
34
13
C
R
2
R
The RGB, respectively C
setting individually for luminance (GY) and colour
difference signals (GCD).
Reference levels are measured with a colour bar,
100% white, 100% amplitude and 100% saturation.
0
SIGNALS
1
Y1
3
(1)
BITS
R
235
235
235
235
16
16
16
16
(2)
C
SAA7128H; SAA7129H
4
B
2
R
2
-Y-C
Y2
G
235
235
235
235
5
B
16
16
16
16
(2)
path features a gain
2
Product specification
C
6
R
2
3
B
235
235
235
235
16
16
16
16
(2)
Y3
7