To perform an NR (noise removal) processing and an enlarging/reducing processing of a video signal, an NR buffer (104) is composed of, e.g., five line memories. An NR section (103) and an enlarging/reducing section (105) are controlled by a control section (108). While the control section (108) allows the NR section (103) to output one line of the video signal from which noise is removed by the NR section(103) to any one of the line memories of the NR buffer (104), and controls the NR section(103) and the enlarging/reducing section (105) so as to allow the NR buffer (104) to input lines of the video signal stored in line memories in the NR buffer (104) other than the line memory where the one line of the video signal is inputted from the NR section (103) into the enlarging/reducing section(105). As a result, the memory size can be reduced and the noise component of the video signal can be removed.