A Stereo Acoustic Echo Cancellation Method Based on the Hybrid of Spectral Dominance and Nonlinear Transformation
Yang He-fei Zheng Cheng-shi Li Xiao-dong
(Institute of Acoustics, Chinese Academy of Sciences, Beijing 100190, China)
(Shanghai Advanced Research Institute, Chinese Academy of Sciences, Shanghai 201210, China)
Abstract：In stereophonic Acoustic Echo Cancellation (AEC) systems, the strong correlation between the two stereophonic channels leads to nonuniqueness of adaptive solutions and further large filter misalignment. To solve this problem and preserve speech quality, the psychoacoustic spectral dominance effect is utilized to propose a novel hybrid decorrelation method for stereo AEC. According to spectral dominance, weak sinusoids are injected at the three lowest harmonics so as to reduce low-frequency coherence. Besides, the nonlinear transformation method is modified and applied to high-frequency decorrelation. Comparison test on several performances with traditional approaches is carried out. Results show that the proposed method can effectively improve filter misalignment together with convergence rate. Moreover, low speech distortion can be achieved simultaneously.
杨鹤飞, 郑成诗, 李晓东. 基于谱优势与非线性变换混合的立体声声学回声消除方法[J]. 电子与信息学报, 2015, 37(2): 373-379.
Yang He-Fei, Zheng Cheng-Shi, Li Xiao-Dong. A Stereo Acoustic Echo Cancellation Method Based on the Hybrid of Spectral Dominance and Nonlinear Transformation. , 2015, 37(2): 373-379.
2015, Vol. 37 
