FEDL87V2107-01
OKI Semiconductor
ML87V2107
d Judgment Noise Level Selection
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.
Table F2-1-7 (8) Luminance Judgment Noise Level Selection
PNON YBDTO1
Luminance noise average value condition
Luminance judgment noise level
Blanking period noise level
Valid data period noise level
0
1
X
0
—
—
Blanking period noise level ≤ Valid data period noise
1
1
1
1
Blanking period noise level
Valid data period noise level
level
Blanking period noise level > Valid data period noise
level
Table F2-1-7 (9) Chrominance Judgment Noise Level Selection
Chrominance judgment noise
level
PNON CBDTO1
Chrominance noise average condition
0
1
X
0
—
—
Blanking period noise level
Valid data period noise level
Blanking period noise level ≤ Valid data period noise
1
1
1
1
Blanking period noise level
Valid data period noise level
level
Blanking period noise level > Valid data period noise
level
53/152
OKI [ OKI ELECTRONIC COMPONETS ]
