Robust Speaker Extraction Network Based on Iterative Refined Adaptation

Speaker extraction aims to extract target speech signal from a multi-talker environment with interference speakers and surrounding noise, given a reference speech from target speaker. Most speaker extraction systems achieve satisfactory performance in the closed condition. Such systems suffer from performance degradation given unseen target speakers and/or mismatched reference speech. In this paper we propose a novel strategy named Iterative Refined Adaptation (IRA) to improve the robustness and generalization capability of speaker extraction systems in the aforementioned scenarios. Given an initial speaker embedding encoded by an auxiliary network, the extraction network can obtain a latent representation of the target speaker as the feedback of the auxiliary network to refine the speaker embedding, which provides more accurate guidance for the extraction network. Experiments show that the network with IRA confirm the superior performance over comparison approaches in terms of SI-SDRi and PESQ on WSJ0-2mix-extr and WHAM! dataset.