Title :
Higher-order time-varying allpass filters for signal decorrelation in stereophonic acoustic echo cancellation
Author :
Tangsangiumvisai, N. ; Chambers, J.A. ; Constantinides, A.G.
Author_Institution :
Dept. of Electr. & Electron. Eng., Imperial Coll. of Sci., Technol. & Med., London, UK
fDate :
1/7/1999 12:00:00 AM
Abstract :
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
Keywords :
all-pass filters; audio signal processing; decorrelation; echo suppression; time-varying filters; higher-order time-varying allpass filters; linear phase response; signal decorrelation; stereophonic acoustic echo cancellation; subjective listening tests; time variation;
Journal_Title :
Electronics Letters
DOI :
10.1049/el:19990036
