发明名称 |
Zoom microphone device |
摘要 |
A pickup section transduces sounds to audio signals. A zoom control section outputs a zoom position signal corresponding to a zoom position. A directivity control section alters the directivity characteristics under a telescopic operation so as to mainly pick up sounds coming from a frontal direction with an enhancement which is in accordance with the zoom position signal, thereby outputting an R channel audio signal and an L channel audio signal. In accordance with the zoom position signal, a noise suppression section applies a greater degree of suppression to the background noise contained in the respective channel audio signals under the telescopic operation than under a wide-angle operation. As a result, a target sound from a remote location can be picked up with a sufficient enhancement in accordance with the zoom position under the telescopic operation.
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申请公布号 |
US6931138(B2) |
申请公布日期 |
2005.08.16 |
申请号 |
US20010983284 |
申请日期 |
2001.10.23 |
申请人 |
MATSUSHITA ELECTRIC INDUSTRIAL CO., LTD |
发明人 |
KAWAMURA TAKASHI;KANAMORI TAKEO;ISHIMOTO TOSHIHIDE |
分类号 |
H04R1/40;H04R3/00;(IPC1-7):H04R3/00;H04N5/76 |
主分类号 |
H04R1/40 |
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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