PEDL87V21071-01
OKI Semiconductor
ML87V21071
2.1.1 Noise Reduction Mode
The noise reduction mode is set by NR2OFF(SUB:48h-bit[4]), FNRM[1:0] (SUB:48h-bit[6:5]), and you can
select the noise reduction modes shown in Table F2-1-1.
Synthesis of an adaptive noise reduction mode is performed by checking motions that are predicted from the
motion detection signal and differential signal level that are detected at noise reduction between frames, fields, or
lines.
For determining the motion difference level, weighting factor can be applied to frames by setting the adaptive
margin that is set by YFAM(SUB:4Ah-bit[1]), CFAM(SUB:4Bh-bit[1]). NR effect is improved by applying
weighting factor to frames (however, afterimage will be more likely to occur).
Table F2-1-1 (1) Noise Reduction Modes
FNRM
NR2OFF
0
Noise Reduction Mode
[1]
0
[0]
0
Fully adaptive frame-recursive NR (uses frames, fields, and
lines)
0
0
0
1
1
0
1
1
X
X
1
0
1
0
1
3D adaptive frame-recursive NR (uses frames and fields)
2D adaptive frame-recursive NR (uses frames and lines)
Frame-recursive NR
2D adaptive field-recursive NR (uses fields and lines)
Field-recursive NR
Table F2-1-1 (2) Luminance Adaptive Margin Settings
Luminance adaptive
Remarks
YFAM
margin
0
1
0
Frame NR performance emphasized (larger
NR, larger afterimage)
–2
F2-1-1 (3) Chrominance Adaptive Margin Settings
Chrominance adaptive
Remarks
CFAM
Margin
0
1
0
Frame NR performance emphasized (larger
NR, larger afterimage)
–2
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