| 摘要 |
PURPOSE:To reduce noise in a microphone voice signal due to noise or vibration caused in zooming by activating a high pass filter provided to a post stage of the microphone during zooming. CONSTITUTION:Noise in a voice signal picked up by a microphone attended with pickup of noise, vibration or other wind noise or the like caused from a zoom motor 13 and a zooming lens driver 12 or the like by the microphone 1 is reduced by activating a high pass filter 2 arranged at the post-stage of the microphone 1 during zooming. Moreover, when no zooming is applied, the high pass filter 2 is deenergized to prevent it that the low frequency component of the voice signal to be collected substantially by the microphone 1 is prevented from being excessively lost. Thus, the noise invaded in the voice signal picked up by the microphone during zooming is sufficiently reduced and excess loss of the low frequency component in the voice signal to be substantially collected is prevented. |
