a, OSD: On-Screen Display. It is a menu showing all functions on the screen
b, NR: Noise Reduction. When it is night, NR can make the snow point on the screen less to make the image clear.
c, WDR: Wide Dynamic Range. When the camera faces the strong light area, WDR can make those very dark areas lighter and make those very light areas clear.
d, ATR: Adaptive Tone-curve Reproduction(Digital Wide Dynamic Range).
e, HLC: High Light Compensation.