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1. 发明授权

US5459750A Apparatus and method for discriminating and suppressing noise within an incoming signal 失效
标题翻译：用于识别和抑制进入信号内的噪声的装置和方法
公开(公告)号：US5459750A
公开(公告)日：1995-10-17
申请号：US280297
申请日：1994-07-26
申请人： Dimitris Hiotakakos , Mark A. Ireton , Costas S. Xydeas , John G. Bartkowiak , Safdar M. Asghar
发明人： Dimitris Hiotakakos , Mark A. Ireton , Costas S. Xydeas , John G. Bartkowiak , Safdar M. Asghar
IPC分类号： H03G3/34 , H04B1/10 , H04L27/14
CPC分类号： H04B1/1027 , H03G3/344
摘要： An apparatus and method for discriminating and suppressing noise within an incoming signal including a first signal processor to generate a first signal representing the incoming signal; a second signal processor to generate a second signal representing the first signal; a prediction device which generates a prediction for the second signal; a logic device which determines the difference between the second signal and the prediction and generates a logic output having a first value when the difference exceeds a threshold and a second value when the difference does not exceed the threshold; and a muting device to mute the incoming signal when the logic output has one value and not mute the incoming signal when the logic output has the other value. The method includes the steps of (1) generating a first signal representing the average signal energy of the incoming signal; (2) generating a second signal representing the first signal normalized with respect to a maximum signal energy expected; (3) generating a prediction for the second signal; (4) determining a difference between the second signal and the prediction; (5) generating a control signal having a first value when the difference exceeds a threshold and a second value when the difference does not exceed the threshold; and (6) providing a muting device which responds to the control signal to mute the incoming signal when the control signal has one value and not mute the incoming signal when the control signal has the other value.
摘要翻译：一种用于识别和抑制包括第一信号处理器的输入信号内的噪声以产生表示输入信号的第一信号的装置和方法; 第二信号处理器，用于产生表示第一信号的第二信号; 产生第二信号的预测的预测装置; 确定所述第二信号和所述预测之间的差异的逻辑装置，并且当所述差异超过阈值时产生具有所述差值超过阈值的第一值的逻辑输出，以及当所述差值不超过所述阈值时产生第二值; 以及当逻辑输出具有一个值时静音输入信号的静音装置，而当逻辑输出具有另一个值时，不会使输入信号静音。该方法包括以下步骤：（1）产生表示输入信号的平均信号能量的第一信号; （2）产生表示相对于预期的最大信号能量归一化的第一信号的第二信号; （3）产生第二信号的预测; （4）确定第二信号与预测之间的差; （5）当差值超过阈值时产生具有第一值的控制信号，当差值不超过阈值时产生第二值; 以及（6）当控制信号具有一个值时，提供一个响应于控制信号使静音输入信号的静音装置，并且当控制信号具有另一个值时不提供静音。

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