Time-varying allpass filters using spectral-shaped noise for signal decorrelation in stereophonic acoustic echo cancellation

Author

Tangsangiumvisai, N. ; Chambers, J.A. ; Constantinides, A.G.

Author_Institution

Dept. of Electr. Eng., Chulalongkorn Univ., Bangkok, Thailand

Volume

2

fYear

2002

fDate

2002

Firstpage

1273

Abstract

In this paper, a signal decorrelation technique is presented that aims to minimise the degradation on stereo signal perception, whilst alleviating the non-uniqueness problem in stereophonic acoustic echo cancellation (SAEC). The proposed technique is based on higher-order time-varying allpass filters (HO-TV-APF) utilising spectral-shaped noise, together with the interpolation method. The test results on real speech signals indicate improved performance in both objective and subjective manners.

Keywords

acoustic signal processing; all-pass filters; decorrelation; echo suppression; interpolation; spectral analysis; speech processing; teleconferencing; time-varying filters; degradation minimization; higher-order filters; interpolation method; nonuniqueness problem; performance; signal decorrelation; spectral-shaped noise; speech signals; stereo signal perception; stereophonic acoustic echo cancellation; teleconferencing system; time-varying allpass filters; Acoustic noise; Adaptive filters; Baseband; Computational complexity; Decorrelation; Delay; Equations; Frequency; Low-frequency noise; Signal processing;

fLanguage

English

Publisher

ieee

Conference_Titel

Digital Signal Processing, 2002. DSP 2002. 2002 14th International Conference on

Print_ISBN

0-7803-7503-3

Type

conf

DOI

10.1109/ICDSP.2002.1028325

Filename

1028325