Recording channel mismatch between training and testing conditions has been shown to be a serious problem for speech separation. This situation greatly reduces the separation performance, and cannot meet the requirement of daily use. In this study, inheriting the use of our previously constructed TAT-2mix corpus, we address the channel mismatch problem by proposing a channel-aware audio separation network (CasNet), a deep learning framework for end-to-end time-domain speech separation. CasNet is implemented on top of TasNet. Channel embedding (characterizing channel information in a mixture of multiple utterances) generated by Channel Encoder is introduced into the separation module by the FiLM technique. Through two training strategies, we explore two roles that channel embedding may play: 1) a real-life noise disturbance, making the model more robust, or 2) a guide, instructing the separation model to retain the desired channel information. Experimental results on TAT-2mix show that CasNet trained with both training strategies outperforms the TasNet baseline, which does not use channel embeddings.

该研究介绍了一种建立在深度学习框架上的端到端时间域语音分离方法，称作基于通道感知音频分离网络(CasNet)，其中引入由通道编码器生成的通道嵌入来解决混合语音中的通道问题，实验结果表明使用此方法的 CasNet 比传统无通道嵌入的 TasNet 有更好的效果。

CasNet: 探究语音分离的通道稳健性