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參數(shù)資料
| 型號： | SDA9401 |
| 廠商： | Electronic Theatre Controls, Inc. |
| 英文描述： | Scan Rate Converter using Embedded DRAM Technology Units |
| 中文描述： | 掃描頻率轉換器采用嵌入式DRAM技術股 |
| 文件頁數(shù)： | 23/69頁 |
| 文件大?。?/td> | 1142K |
| 代理商： | SDA9401 |
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Micronas
23
Preliminary Data Sheet
SDA 9401
Equation for temporal noise reduction (luminance signal)
Equation for temporal noise reduction (chrominance signal)
The next figure shows the motion detector in more detail. Temporal noise reduction can be switched
off by NRON (NRON=0). The parameter TNRFIY/C switches between a fixed noise reduction K-
factor TNRVAY/C (TNRFIY/C=0) or a motion adaptive noise reduction K-factor (TNRFIY/C=1).
Block diagram of motion detector
In case of adaptive noise reduction the K-factor depends on the detected “Motion” (see figure
above). The “Motion”-Ky/Kuv characteristic curve (LUT) is fixed inside the SDA 9401, but the
characteristic curve can be changed by two parameters: TNRHOY/C and TNRKOY/C. TNRHOY/C
shifts the curve horizontally and TNRKOY/C shifts the curve vertically. For a fixed characteristic
curve, the sensitivity of the motion detector is adjustable by TNRCLY/C.
LUT for motion detection I
YOUT
1
---------------
Ky
+
16
YSNR
YR
–
Θ
Ρ
YR
+
=
UVOUT
1
------------
K
+
16
UVSNR
UV
1
–
Θ
Ρ
UV
1
K
;
+
Ky;
Θ
Ρ
=
=
TNRCLY/C+1
TNRHOY/C
LUT
TNRKOY/C+1
MUX
1
0
TNRVAY/C
MUX
15
Ky/uv
1
0
NRON
n
DY/UV
TNRFIY/C
Motion
Motion
detection
0
5
10
15
20
25
30
Motion
Ky/Kuv
5
10
15
n
TNRKOY/C
TNRHOY/C=0
TNRKOY/C=-1
TNRKOY/C=-8
TNRHOY/C=0
TNRKOY/C=7
TNRHOY/C=0
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