一种改进的基子波束形成和复倒谱滤波的语音去混响方法  

An Improved Speech De-reverberation Method Based on Beam-forming and Complex Cepstrum Filtering.

作　　者：苏先礼[1] 何培宇[1] 

机构地区：[1]四川大学电子信息学院,成都610064

出　　处：《通讯和计算机（中英文版）》2005年第8期50-55,共6页Journal of Communication and Computer

基　　金：本文得到国家自然科学基金资助项目（No.60472096）的资助.

摘　　要：本文在波束形成和复倒谱滤波的室内语音去混响方法基础上，引入加指数窗方法使语音信号最小相位化，形成了一种改进方法，该方法使计算量约减少了一半。并运用四种客观音质评价指标和两种主观音质评价指标，分别对各种去混响方法进行仿真实验评测，结果表明改进方法的去混响性能有明显的改善。Based on an existing speech de-reverberation method （BCF-MA） from beam-forming （BF） and complex cepstrum filtering （CF）, a new method （BCF-EW） is proposed by introducing an exponential window in order to make speech signals be of minimum-phase. The computational complexity of BCF-EW is reduced to only about half of BCF-MA＇s. Four objective and two subjective evaluation methods for speech quality are applied to compare the performances of BCF-EW with three other de-reverberation methods （BF, CF, BCF-MA） mentioned above via simulations. Experimental results indicate that the de-reverberation performance of BCF-EW is improved considerably.

关 键 词：去混响 语音处理 波束形成 复倒谱 指数窗 

分 类 号：TN912.3[电子电信—通信与信息系统]