Patent ID: 8462172

Claim:
A video display apparatus comprising: an area-specific lighting value calculator configured to calculate a lighting value for each of backlight regions based on an input video signal and to output the lighting values as numerical data; a first correction gain setting module configured to set a first signal correction coefficient based on the lighting values; a frequency separator configured to separate the input video signal into a first and a second component based on frequency; a first signal corrector configured to correct the first component of the input video signal by multiplying the first component by the first signal correction coefficient; a second correction gain setting module configured to set a second signal correction coefficient based on a quantity of noise in the input video signal, such that an increase in the quantity of noise decreases the second signal correction coefficient, and a decrease in the quantity of noise increases the second signal correction coefficient; a second signal corrector configured to correct the second component of the input video signal by multiplying the second component by the second signal correction coefficient; and a display controller configured to control a display module to display the corrected components of the input video signal.