公开(公告)号：KR100850419B1

公开(公告)日：2008-08-04

申请号：KR1020070043046

申请日：2007-05-03

Applicant: 경북대학교 산학협력단

Inventor： 김명남 ,  이상흔 ,  장용민 ,  김필운 ,  김규동 ,  이윤정

IPC: G10K11/16 ,  G10K11/04

CPC classification number: G10K11/16 ,  G10K2210/3028 ,  G10L21/0208

Abstract: A device for cancelling adaptive noise is provided to remove noise and improve voice by using a weight control method under working environment that is difficult to measure a pure noise source. A device for cancelling adaptive noise comprises a Finite Impulse Response(FIR) filter(100), a transverse line filter(200), an adaptive weight renewal unit(400), a control unit(300) and a restoring filter(600). The FIR filter isolates a high frequency band containing no voice component with respect to an input signal, and performs a pretreatment process for passing only a voice band. The transverse line filter forms weight with respect to the pretreated input signal as a filter coefficient, and performs transverse line filtering. The adaptive weight renewal unit renews weight so that an output signal outputted from the transverse line filter follows a standard signal. The control unit analyzes the output so as to judge if the output signal outputted from the transverse line filter is a voice signal, and controls renewal of the weight. The restoring filter performs filtering of the output signal outputted from the transverse line filter and outputs it.

Abstract translation: 提供一种用于消除自适应噪声的装置，通过使用难以测量纯噪声源的工作环境下的重量控制方法来消除噪声和改善声音。 用于消除自适应噪声的装置包括有限脉冲响应（FIR）滤波器（100），横线滤波器（200），自适应加权更新单元（400），控制单元（300）和恢复滤波器（600）。 FIR滤波器相对于输入信号隔离不包含语音分量的高频带，并执行仅通过语音频带的预处理过程。 横线滤波器相对于预处理的输入信号形成滤波系数的权重，并进行横向线滤波。 自适应重量更新单元更新重量，使得从横向线滤波器输出的输出信号遵循标准信号。 控制单元分析输出，以判断从横线滤波器输出的输出信号是否是语音信号，并控制重量的更新。 恢复滤波器对从横线滤波器输出的输出信号进行滤波并输出。