Speech Enhancement with Dual-path Multi-Channel Linear Prediction Filter and Multi-norm Beamforming

In this paper, we propose a speech enhancement method using dual-path Multi-Channel Linear Prediction (MCLP) filters and multi-norm beamforming. Specifically, the MCLP part in the proposed method is designed with dual-path filters in both time and frequency dimensions. For the beamforming part, we minimize the power of the microphone array output as well as the l1 norm of the denoised signals while preserving source signals from the target directions. An efficient method to select the prediction orders in the dual-path filters is also proposed, which is robust for signals with different reverberation time (T60) values and can be applied to other MCLP-based methods. Evaluations demonstrate that our proposed method outperforms the baseline methods for speech enhancement, particularly in high reverberation scenarios.