Signal processing apparatus and projection display apparatus

A signal processing apparatus configured to convert an image input signal to an image output signal and output the image output signal to a display device, the signal processing apparatus comprising:

• a color coordinate adjusting unit configured to perform a color coordinate adjusting processing of adjusting a color coordinate of the image input signal, in accordance with a color space of the display device;
• a luminance adjusting unit configured to perform a luminance adjusting processing of adjusting a luminance component of the image input signal;
• an output signal generating unit configured to generate the image output signal, in accordance with the color coordinate adjusted by the color coordinate adjusting processing and the luminance component adjusted by the luminance adjusting processing;
• and
• a control unit configured to control a contribution degree of color coordinate adjustment, which the color coordinate adjusting processing imparts to the image output signal, and a contribution degree of a luminance component, which the luminance adjusting processing imparts to the image output signal, in accordance with saturation of the image input signal, wherein
• the control unit increases the contribution degree of the luminance component and reduces the contribution degree of the color coordinate adjustment, as the saturation of the image input signal is higher in a specific hue.