On-screen signal processing apparatus

Screen signal processing apparatus according to the present invention includes: a first display memory for storing binary image data; a second display memory for storing fixed data of a plurality of pixels of a first binary image stored in the display memory modification modified data; and a first color designation table for storing the character color and background color data relating to the modification of the first binary image data stored in the display memory. A first converter to a fixed plurality of pixels read binary image data in the first display memory and modified data in the second display memory, and based on the character color and background color specified in a first color modification data query specified table, and further converting the first display memory executes color binary image data.