| 摘要 |
<p>The present invention is to provide a noise canceller which, when removing a noise mixed in an input signal, can remove the noise without internally generating another noise component. A noise period detecting unit 8 detects a noise mixing period Ä of a noise in an input signal Sin, while a correction period setting unit 9 sets a period including the noise mixing period Ä and an additional period Tadd as a correction period. During the correction period (Ä+Tadd), a hold unit 6 holds the input signal Sin and outputs a hold signal SHA. A first mute unit 4 applies a mute processing to the input signal Sin to generate a correction signal SB and a second mute unit 7 applies a mute processing to the hold signal SHA to generate an interpolation signal SA. A first gain adjusting unit 10 adjusts the gains of the first and second mute means during at least the noise mixing period Ä and the additional period Tadd of the correction period. A synthesizing unit 5 synthesizes together the correction signal SB and the correction signal SB generated by the foregoing adjustment, thereby removing a mixed noise and generating an output signal Sout having a waveform similar to the input signal Sin, without newly generating a high frequency noise component.</p> |
