Patent ID: 7359567
Filing Date: 2008-04-15
Classification: H04N

Abstract:
1. A signal processing apparatus comprising: a generator configured to generate a luminance signal of an input video signal; an extractor configured to extract a high frequency signal from said input video signal, and including a first bandpass filter connected to a coring circuit configured to output said high frequency signal; a mask generator configured to generate a mask by masking image quality degrading components contained in said high frequency signal, and including an absolute value calculator connected to a low pass filter connected to a threshold processor connected to a point eliminator connected to a mask processor configured to output said mask, the low pass filter configured to output a low passed signal; a gain factor generator configured to generate a gain factor based on two separate inputs, said two separate inputs being said mask and said low passed signal; a contour correction signal generator configured to generate a contour correction signal by multiplying said high frequency signal by said gain factor; and a luminance corrector configured to correct said luminance signal based on said contour correction signal.