SIGNAL PROCESSING DEVICE, IMAGING DEVICE, AND PROGRAM

摘要

PROBLEM TO BE SOLVED: To provide a signal processing device that can appropriately reduce a noise contained in a sound signal.SOLUTION: A signal processing device comprises: a conversion part that converts a sound signal to a frequency area signal; a calculation part that calculates flatness of a magnitude of a frequency component of the frequency area signal of the sound signal; a determination part that determines a deduction coefficient upon deducting a frequency area signal of a noise from the frequency area signal of the sound signal on the basis of the flatness calculated by the calculation part; and a deduction part that deducts the frequency area signal of the noise from the frequency area signal of the sound signal in accordance with the deduction coefficient determined by the determination part.