| 摘要 |
PROBLEM TO BE SOLVED: To provide an imaging apparatus capable of properly eliminating the noise component of a mechanism sound included in a sound signal by properly utilizing a noise spectrum at photographing, and a sound recording method and program. SOLUTION: A short time power calculation section 65 calculates the power of a signal of only a motor sound picked up from a reference input section 64 (reference microphone) at the time of photographing and discriminates production timing of the motor sound from the power of the motor sound to carry out noise elimination processing (subtract processing). When the imaging apparatus is provided with a function of amplifying the input sound from a sound input section 51 (main microphone) and adjusting its level by an amplifier 61, a coefficient in accordance with the level of the input sound is multiplied with the noise spectrum (Xv) stored in a storage section 54 and the noise spectrum (Xv) after the coefficient multiplication is subtracted from the spectrum (Ia) of the sound signal. Thus, the noise spectrum is properly used at the time of photographing so that the noise component of the mechanism sound included in the sound signal can properly be eliminated. COPYRIGHT: (C)2007,JPO&INPIT
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