发明名称 |
Audio signal noise reduction system |
摘要 |
<p>An audio signal noise reduction system comprises a noise detecting circuit 11 for detecting a noise from an audio signal and outputting a detection signal indicating a start time and an end time of a noise period of the noise, an LPF 12 for extracting a low frequency component of the audio signal, an HPF 14 for extracting intermediate and high frequency components of the audio signal, a polynomial interpolation circuit 13 for polynomial-interpolating the noise period of the low frequency component being extracted, a mute circuit 15 for muting an output level of the noise period of the intermediate and high frequency components being extracted, and a signal synthesizing circuit 16 for synthesizing the low frequency component whose noise period is polynomial-interpolated and the intermediate and high frequency components the level of whose noise period is suppressed to thus output the audio signal. <IMAGE></p> |
申请公布号 |
EP0973269(A2) |
申请公布日期 |
2000.01.19 |
申请号 |
EP19990303997 |
申请日期 |
1999.05.24 |
申请人 |
MITSUBISHI DENKI KABUSHIKI KAISHA |
发明人 |
TSUJI, MASAYUKI;TSUJISHITA, MASAHIRO;TAURA, KENICHI;ISHIDA, MASAYUKI |
分类号 |
H04B1/10;H03G3/34;H04B1/16;H04R15/00;(IPC1-7):H04B1/16 |
主分类号 |
H04B1/10 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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