Higher-order time-varying allpass filters for signal decorrelation in stereophonic acoustic echo cancellation

作     者：Tangsangiumvisai, N Chambers, JA Constantinides, AG 

作者机构：Univ London Imperial Coll Sci Technol & Med Dept Elect & Elect Engn London SW7 2AZ England 

出 版 物：《ELECTRONICS LETTERS》 (电子学快报)

年 卷 期：1999年第35卷第1期

页      面：88-90页

核心收录：

学科分类：0808[工学-电气工程] 0809[工学-电子科学与技术（可授工学、理学学位）] 08[工学] 

主　　题：time-varying filters subjective listening tests signal decorrelation linear phase response Filtering methods in signal processing higher-order time-varying allpass filters time variation audio signal processing all-pass filters Speech and audio signal processing echo suppression decorrelation stereophonic acoustic echo cancellation 

摘      要：A new technique is presented for decorrelating the input signals in stereophonic systems by means of time-varying allpass filters. The controllable and almost linear phase response of higher-order allpass filters is exploited in this context and a particular type of time variation is used to vary the parameters of such filters. Simulation results are presented based on real stereophonic signals and supported by subjective listening tests.