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
130-133
,共4页
小波去噪%阈值函数%清浊音分离
小波去譟%閾值函數%清濁音分離
소파거조%역치함수%청탁음분리
wavelet denoising%threshold function%separation of unvoiced sounds and voiced sounds
结合小波阈值去噪和清浊音分离技术,提出了一种优化的语音去噪新方法.首先,针对语音清音部分往往包含有许多类似噪声的高频成分的特点,对其直接进行小波阈值去噪很可能误除了这些高频成分,造成失真,因此有必要先对语音进行清浊音分离.其次,通过对不同小波函数、阈值选取规则以及阈值处理函数的优化,选择最佳的小波去噪方法.仿真结果表明,与经典小波阈值去噪方法相比,提出的方法既尽可能地去除噪声,又保留了原来语音的特征,较大地提高了语音质量.
結閤小波閾值去譟和清濁音分離技術,提齣瞭一種優化的語音去譟新方法.首先,針對語音清音部分往往包含有許多類似譟聲的高頻成分的特點,對其直接進行小波閾值去譟很可能誤除瞭這些高頻成分,造成失真,因此有必要先對語音進行清濁音分離.其次,通過對不同小波函數、閾值選取規則以及閾值處理函數的優化,選擇最佳的小波去譟方法.倣真結果錶明,與經典小波閾值去譟方法相比,提齣的方法既儘可能地去除譟聲,又保留瞭原來語音的特徵,較大地提高瞭語音質量.
결합소파역치거조화청탁음분리기술,제출료일충우화적어음거조신방법.수선,침대어음청음부분왕왕포함유허다유사조성적고빈성분적특점,대기직접진행소파역치거조흔가능오제료저사고빈성분,조성실진,인차유필요선대어음진행청탁음분리.기차,통과대불동소파함수、역치선취규칙이급역치처리함수적우화,선택최가적소파거조방법.방진결과표명,여경전소파역치거조방법상비,제출적방법기진가능지거제조성,우보류료원래어음적특정,교대지제고료어음질량.
An optimal speech denoising method which combines wavelet shrinkage and separation of unvoiced sounds and voiced sounds is presented.Firstly.the unvoiced sounds in speech often contain many high-frequency noise-similar components.If wavelet shrinkage method is directly adopted,it is likely to remove mistakenly these high-frequency components and result in distortion of speech,so it is necessary to separate unvoiced sounds and voiced sounds.Secondly.the optimal method of wavelet shrinkage is followed by optimization of many aspects such as different wavelets,threshold selection rules and threshold functions.Compared with the traditional method,it either removes noise as much as possible or retains the original characteristics of speech,which improves speech quality greatly.
