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參數(shù)資料
| 型號： | 935262321518 |
| 廠商： | NXP SEMICONDUCTORS |
| 元件分類： | 顏色信號轉(zhuǎn)換 |
| 英文描述： | COLOR SIGNAL ENCODER, PQFP44 |
| 封裝： | PLASTIC, QFP-44 |
| 文件頁數(shù)： | 43/43頁 |
| 文件大?。?/td> | 193K |
| 代理商： | 935262321518 |
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1999 May 31
9
Philips Semiconductors
Product specication
Digital video encoder
SAA7126H; SAA7127H
Input levels and formats
The SAA7126H; SAA7127H expects digital Y, Cb, Cr data
with levels (digital codes) in accordance with
“CCIR 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.
The RGB, respectively Cr-Y-Cb path features a gain
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.
Table 1
“CCIR 601” signal component levels
Notes
1. Transformation:
a) R = Y + 1.3707
× (Cr 128)
b) G = Y
0.3365 × (Cb 128) 0.6982 × (Cr 128)
c) B = Y + 1.7324
× (Cb 128).
2. Representation of R, G and B (or Cr, Y and Cb) at the output is 9 bits at 27 MHz.
Table 2
8-bit multiplexed format (similar to
“CCIR 601”)
COLOUR
SIGNALS(1)
YCb
Cr
R(2)
G(2)
B(2)
White
235
128
235
Yellow
210
16
146
235
16
Cyan
170
166
16
235
Green
145
54
34
16
235
16
Magenta
106
202
222
235
16
235
Red
81
90
240
235
16
Blue
41
240
110
16
235
Black
16
128
16
TIME
BITS
01234567
Sample
Cb0
Y0
Cr0
Y1
Cb2
Y2
Cr2
Y3
Luminance pixel number
0123
Colour pixel number
0
2
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