PEDL87V21071-01
OKI Semiconductor
ML87V21071
2.2.1 Cross-Color Canceling in the NTSC System
In the NTSC system, when CCON (SUB:5Eh-bit[0]) is set to 1 in the I2C-bus interface, the 3D comb filter
between the data one frame prior to the chrominance and the input data operates, realizing the cross-color
cancellation in the NTSC system, as shown in Figure F2-2-1.
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
setting 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]).
Only the NTSC system supports movement compensation by detection of 0 degree (360 degree) phase by the data
two frames prior to the chrominance, enabling adjustments of the chrominance 0 degree phase detection level.
When using the movement compensation function, 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 F2-2-1 Cross-Color Cancellation in the NTSC System
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