ml87v2105 Oki Semiconductor, ml87v2105 Datasheet - Page 38

• Manufacturer Part Number: ml87v2105
• Description: Video Signal Noise Reduction Ic With A Built-in 5.6 Mbit Frame Memory
• Manufacturer: Oki Semiconductor

OKI Semiconductor
PNON
PNON
Select the judgment noise level based on the procedure for basic noise level detection described above.
When PNON (SUB:49h-bit[7]) = 0, the blanking period noise level is referenced for the judgment noise level.
When PNON = 1, the overall noise status is referenced on the noise level of the valid data period when the noise
status of the blanking period is judged to be low noise (YBDTO1 = 0, CBDTO1 = 0). When the noise status of
the blanking period is judged to be high (YBDTO1 = 1, CBDTO1 = 1), the average noise level of the blanking
period and the average noise level of the valid period are compared and the smaller value is referenced for the
overall noise status.
Switching between the blanking period and the valid data period occurs when the noise average value condition
has continued for four frames or more.
0
1
1
1
0
1
1
1
Judgment Noise Level Selection
YBDTO1
CBDTO1
X
X
0
1
1
0
1
1
Table F1-3-7 (10) Color Difference Judgment Noise Level Selection
Table F1-3-7 (9) Luminance Judgment Noise Level Selection
Blanking period noise level
Blanking period noise level > Valid data period noise
Blanking period noise level
Blanking period noise level > Valid data period noise
Luminance noise average value condition
Color difference noise average condition
level
level
level
level
—
—
—
—
Valid data period noise
Valid data period noise
Valid data period noise level
Valid data period noise level
Valid data period noise level
Valid data period noise level
Luminance judgment noise
Blanking period noise level
Blanking period noise level
Blanking period noise level
Blanking period noise level
Color difference judgment
noise level
level
PEDL87V2105-02
ML87V2105
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