PEDL87V21071-01
OKI Semiconductor
ML87V21071
d Judgment Noise Level Selection
Select the judgment noise level based on the procedure for basic noise level detection described above.
When PODT = 0 and PNON = 0, the blanking period noise level is referenced for the judgment noise level.
When PODT = 0 and 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.
When PODT = 1, the noise level of the valid data period is referenced for the judgment noise level.
Table F2-1-7 (8) Luminance Judgment Noise Level Selection
Luminance noise average value noise level
PODT
PNON
YBDTO1
Luminance judgment noise level
condition
0
0
0
0
1
0
1
1
1
X
X
0
1
1
X
—
Blanking period noise level
Valid data period noise level
Blanking period noise level
Valid data period noise level
Valid data period noise level
—
Blanking period ≤ Valid data period
Blanking period > Valid data period
—
Table F2-1-7 (9) Chrominance Judgment Noise Level Selection
Chrominance noise average value noise
level condition
Chrominance judgment noise
PODT
PNON
CBDTO1
level
0
0
0
0
1
0
1
1
1
X
X
0
1
1
X
—
Blanking period noise level
Valid data period noise level
Blanking period noise level
Valid data period noise level
Valid data period noise level
—
Blanking period ≤ Valid data period
Blanking period > Valid data period
—
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