An image signal processing apparatus converts an input image signal such that the number of pixels in the horizontal direction is converted into 2n pixels, to store the thus-converted into a memory, samples the pixels of the stored image signal in accordance with a predetermined pixel arrangement of a display apparatus to convert the number of pixels in the horizontal direction into n pixels and convert the number of pixels in the vertical direction into m pixels, subsequently converts the image signal converted into n×m pixels into a plurality of color component signals corresponding to the pixels of the display apparatus, further, corrects a center of gravity in accordance with the predetermined pixel arrangement of the display apparatus to output the corrected signals to the display apparatus.