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  • 學位論文

使用適應波束形成與增益衰減後濾波器支殘響消除方法

Dereverberation of Sound Signal Using Adaptive Beamforming and Gain Suppression Post-filtering

指導教授 : 胡竹生

摘要


本論文提出一套依照使用者需求調整訊號衰減率(Signal Decay Rate)來抑制聲音迴響的方法。本方法利用麥克風陣列接收到的訊號中有空間資訊的特性,首先將此空間資訊經由波束形成的方法,先濾除非目標訊號方向的迴響,接著依照訊號衰減的特性來估測訊號的衰減率,並對聲音的迴響能量做估算。結合能量衰減估測與麥克風陣列得到的空間資訊,本論文提出一套調整增益函式的後置濾波器。本方法不需要知道在實際應用中難以觀察的聲音脈衝響應(Acoustic Impulse Response)的資訊,實驗結果將證明本方法的效果。

並列摘要


無資料

並列關鍵字

beamforming post-filter dereverberation decay rate

參考文獻


[18] 朱育成,”使用卡曼濾波器追蹤參考訊號之適應性語音純化波束形成器”,交大電控碩士論文,Sept 2011
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