ml87v21071 Oki Semiconductor, ml87v21071 Datasheet - Page 37

• Manufacturer Part Number: ml87v21071
• Description: Video Signal Noise Reduction Ic With A Built-in Frame Memory
• Manufacturer: Oki Semiconductor

OKI Semiconductor
This feature performs motion compensation for the detected noise using the motion compensation flag CMA[4:0].
As the method of motion compensation , the reduction mode (CNRM = 0) or the noise 0 mode (CNRM = 1) can be
selected by CNRM (SUB:4Bh-bit[0]).
In the reduction mode, the normal reduction mode (CABN = 0) or the absolute noise reduction mode (CABN = 1)
can be selected by CABN (SUB:4Bh-bit[2]).
Chrominance Signal Noise Motion Compensation
Table F2-1-4 (5) Chrominance Normal Reduction Mode Noise Reduction Coefficients
CNRM
X
0
0
1
Table F2-1-4 (4) Chrominance Motion Compensation Mode
[4]
CABN
0
0
0
0
0
0
0
0
0
0
0
0
1
1
1
1
Table F2-1-4 (3) Noise Reduction Coefficients
X
X
0
1
[3]
0
0
0
0
0
0
1
1
[3]
0
0
0
0
0
0
0
0
1
1
1
1
1
1
1
1
[2]
0
0
0
0
1
1
1
1
Motion compensation mode
YMA
CMA
Absolute noise reduction
[2]
0
0
0
0
1
1
1
1
1
1
1
1
1
1
1
1
Normal reduction
[1]
0
0
1
1
1
1
1
1
[1]
Noise 0
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
None
[0]
0
1
0
1
0
1
0
1
[0]
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
YABN = 0
Reduction coefficient
1/16
1/2
1/2
1/4
1/4
1/8
1/8
1
CABN=0
Reduction coefficient
1/16
1/16
1/16
1/2
1/2
1/4
1/2
1/4
1/4
1/8
1/4
1/8
1/8
1/8
1
0
YABN = 1
(Reduction coefficient)
(Reduction coefficient)
Detected noise as is
17/32
9/16
9/16
(Detected noise) x
(Detected noise) x
3/4
3/4
5/8
5/8
Noise 0 judgment
1
CABN=1
17/32
17/32
17/32
9/16
9/16
9/16
9/16
(NROFF)
3/4
3/4
5/8
3/4
5/8
5/8
5/8
1/2
Remarks
1
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