Patent ID: 7796196

Claim:
A picture signal processor comprising: a first table which is set in advance in correspondence to a case in which a non-linear correction processing is performed in a direction in which an amplitude level of a luminance signal is heightened, the table being configured to allow an amplitude level of a luminance signal before the non-linear correction processing to correspond to a first coefficient; a second table which is set in advance in correspondence to a case in which a non-linear correction processing is performed in a direction in which the amplitude level of the luminance signal is lowered, the table being configured to allow an amplitude level of a luminance signal before the non-linear correction processing to correspond to a second coefficient; a determination unit configured to determine on the basis of the luminance signals before and after the non-linear correction processing whether the non-linear correction processing is performed in a direction in which the amplitude level of the luminance signal is heightened, or the non-linear correction processing is performed in a direction in which the amplitude level of the luminance signal is lowered; and a color correction unit configured to perform an amplitude level correction processing to a color signal on the basis of the first coefficient read from the first table when the determination unit determines that the non-linear correction processing is performed in a direction in which the amplitude level of the luminance signal is heightened; and configured to perform an amplitude level correction processing to the color signal on the basis of the second coefficient read from the second table when the determination unit determines that the non-linear correction processing is performed in a direction in which the amplitude level of the luminance signal is lowered.