发明授权
- 专利标题： Noise reduction compression system controlled by compressed output components which are in-band
- 专利标题（中）： 由带内压缩输出组件控制的降噪压缩系统
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申请号： US729781申请日： 1985-05-02
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公开(公告)号： US4683449A公开(公告)日： 1987-07-28
- 发明人: Shigeru Kato
- 申请人： Shigeru Kato
- 申请人地址： JPX Tokyo
- 专利权人： Pioneer Electronic Corporation
- 当前专利权人： Pioneer Electronic Corporation
- 当前专利权人地址： JPX Tokyo
- 优先权： JPX59-89091 19840502; JPX59-89092 19840502
- 主分类号： H03G7/00
- IPC分类号： H03G7/00 ; H03G9/02 ; H04B1/64
摘要：
A noise reduction system which is unaffected by bandwidth limitations of the transmission system with which the noise reduction system is employed. The noise reduction system is of a type including a compressor, the transmission system, which receives a compressed signal from the compressor, and an expander for expanding a signal outputted by the transmission system. In accordance with the invention, a low-pass filter having a pass band corresponding to the transmission band of the transmission system is provided in the stage prior to the compressor. In another embodiment, a low-pass filter is provided in a stage prior to a level detector within the compressor.
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