| 摘要 |
PURPOSE:To make a scale small by constituting a contour and flare correction signal generating part of a concatevation connection composing of a reverse gamma correcting circuit for inputting a digital luminance signal, a contour and flare correction signal forming circuit and a gamma correcting circuit and carrying out the correction by a digital means. CONSTITUTION:A digital luminance signal converted and corrected to a linear signal by a reverse gamma correcting circuit 16 is inputted to a compensating delay device 25, passes through a vertical contour correction FIR filter 21 and a horizontal contour correction FIR filter 22 from a signal line (l) inputs to a subtraction circuit 26a. When it is subtracted from a reference signal of a signal line (n), a high frequency characteristic for correcting the contour is obtained and the correction in four corners of a window pattern at this time is continuously carried out. Similarly, an input from a signal line (m) passes through vertical and horizontal flare correction composite IIR filters 23, 24, is subtracted from a reference signal in a subtraction circuit 26b to obtain a correcting signal of high frequency characteristic. Then, it is passed through coring circuits 27a, 27b respectively and synthesized in a synthesizing circuit 28 and outputted through a gamma correcting circuit 17. Thereby, a small scale circuit constitution can be attained.
|
