计算机工程与应用
計算機工程與應用
계산궤공정여응용
COMPUTER ENGINEERING AND APPLICATIONS
2009年
31期
125-127,153
,共4页
语音增强%离散小渡变换%噪声估计
語音增彊%離散小渡變換%譟聲估計
어음증강%리산소도변환%조성고계
speech enhancement%Discrete Wavelet Transform(DWT)%noise estimation
提出了一种基于二次离散小波变换(DWT)的语音增强算法.该算法首先对带噪语音信号进行离散小波变换,提取离散细节信号,并对其进行第二次离散小波变换.再按照不同的规则选取阈值,对信号进行去噪处理.最后再对出来后的语音信号进行合并.对比实验结果表明,该方法具有良好的消除噪声的效果,提高了语音的清晰度和可懂度.
提齣瞭一種基于二次離散小波變換(DWT)的語音增彊算法.該算法首先對帶譟語音信號進行離散小波變換,提取離散細節信號,併對其進行第二次離散小波變換.再按照不同的規則選取閾值,對信號進行去譟處理.最後再對齣來後的語音信號進行閤併.對比實驗結果錶明,該方法具有良好的消除譟聲的效果,提高瞭語音的清晰度和可懂度.
제출료일충기우이차리산소파변환(DWT)적어음증강산법.해산법수선대대조어음신호진행리산소파변환,제취리산세절신호,병대기진행제이차리산소파변환.재안조불동적규칙선취역치,대신호진행거조처리.최후재대출래후적어음신호진행합병.대비실험결과표명,해방법구유량호적소제조성적효과,제고료어음적청석도화가동도.
An algorithm based on twice discrete wavelet transform for speech enhancement is presented.DWT is used to process the noisy speech.DWT is employed again for the discrete detail coefficients.The thresholds are selected to de-noise the signals using various rules.The de-noised signals are reconstructed.The experiment results show that this method can obtain a well performance and also can enhance the definition and understanding of the speech.
