Time-varying allpass filters using spectral-shaped noise for signal decorrelation in stereophonic acoustic echo cancellation N. Tangsangiumvisai Jonathon Chambers A.G. Constantinides 2134/5767 https://repository.lboro.ac.uk/articles/conference_contribution/Time-varying_allpass_filters_using_spectral-shaped_noise_for_signal_decorrelation_in_stereophonic_acoustic_echo_cancellation/9557150 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. 2010-01-08 16:20:30 Acoustic signal processing All-pass filters Decorrelation Echo suppression Interpolation Spectral analysis Speech processing Teleconferencing Time-varying filters Mechanical Engineering not elsewhere classified