ml87v21071 Oki Semiconductor, ml87v21071 Datasheet - Page 32

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

2.1.1 Noise Reduction Mode
OKI Semiconductor
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).
[1]
0
0
0
0
1
1
FNRM
CFAM
YFAM
0
1
0
1
[0]
X
X
0
0
1
1
Table F2-1-1 (2) Luminance Adaptive Margin Settings
NR2OFF
F2-1-1 (3) Chrominance Adaptive Margin Settings
Chrominance adaptive
Luminance adaptive
0
1
0
1
0
1
Table F2-1-1 (1) Noise Reduction Modes
margin
Margin
–2
–2
Fully adaptive frame-recursive NR (uses frames, fields, and
lines)
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
0
0
Frame NR performance emphasized (larger
NR, larger afterimage)
Frame NR performance emphasized (larger
NR, larger afterimage)
Noise Reduction Mode
Remarks
Remarks
PEDL87V21071-01
ML87V21071
32/123