PEDL87V21071-01
OKI Semiconductor
ML87V21071
2.2.2 Cross-Color Canceling in the PAL System
In the PAL system, when CCON (SUB:5Eh-bit[0]) is set to 1 in the I2C-bus interface, the 3D comb filter between
the data two frames prior to the chrominance and the input data operates, realizing the cross-color cancellation in
the PAL system, as shown in Figure F2-2-2 (CCON=1).
By setting CCMON (SUB:5Eh-bit[0]) to 1, the cross-color cancellation function can perform movement
compensation that is set to ON/OFF in pixel units according to the luminance movement. It allows detailed
settings by selecting the movement detection coefficient (CCMDT: SUB:5Eh-bit[3]), luminance movement
detection level (CCYMS[2:0]-SUB:5Eh-bit[6:4]), and cross-color level feedback (CCMM-SUB:5Eh-bit[7]).
When using the cross-color cancellation function in the PAL system, be sure to set MEM411(SUB:5Eh-bit[1]) to
1 and the memory use mode to 4:1:1.
Before cross-color cancellation
After cross-color cancellation
Figure F2-2-2 Cross-Color Cancellation in the PAL System
2.2.3 Cross-Color Cancellation Auto-OFF Setting
By setting ACC[1:0](SUB:5Fh-bit[5:4]) in the I2C-bus interface, the cross-color cancellation can be stopped
automatically by luminance noise level judgment.
Table F2-2-3 Cross-Color Cancellation Auto-OFF Setting
ACC
Cross-color cancellation
[1]
0
[0]
X
0
Set by CCON
1
Goes OFF if YDT1 = 1 when CCON = 1
Goes OFF if YDT2 = 1 when CCON = 1
1
1
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