语义引导的水下带噪语音通信  

Semantic-guided underwater noisy speech communication

作　　者：江昕越 刘佳惠 张榕鑫 朱逸 袁飞[1] JIANG Xinyue;LIU Jiahui;ZHANG Rongxin;ZHU Yi;YUAN Fei(Key Laboratory of Underwater Acoustic Communication&Marine Information Technology,Minister of Education,Xiamen University,Xiamen 361005)

机构地区：[1]厦门大学水声通信与海洋信息技术教育部重点实验室,厦门361005

出　　处：《声学学报》2024年第6期1324-1336,共13页Acta Acustica

基　　金：国家自然科学基金项目(62371404)资助。

摘　　要：针对狭窄带宽的多径水声信道和信源噪声干扰导致的退化语音,提出了一种语义引导的水下带噪语音通信系统,实现了噪声环境下高效鲁棒的语音通信。首先,通过引入语音去噪网络降低了信源噪声的影响。系统通过传输语音的语义信息,实现了语音信号的极限压缩。针对信道噪声对数据的损伤,使用语义纠错模块在接收端对退化的语义特征进纠错,从而提高重建语音的可理解性。此外,结合多阶段训练策略的退化知情模型进一步增强所提方法在水声信道中的鲁棒性和泛化性。最后,在语音重建过程中使用多感受野-挤压激励融合模块以捕获语义特征中的全局语义信息,优化重建语音的可理解性。仿真实验结果表明,该方法在极低码率压缩的情况下,在复杂的噪声环境和不同的水声信道条件中,具有良好的重建性能。To address degraded speech caused by narrow-bandwidth multipath underwater acoustic channels and source noise interference,this paper proposes a semantic-guided underwater noisy speech communication system,achieving efficient and robust speech communication in noisy environments.First,a speech-denoising network is introduced to reduce the impact of source noise.The system transmits the semantic information of speech,enabling extreme compression of the speech signal.In response to the damage caused by channel noise to the data,a semantic correction module is proposed to correct the degraded semantic features at the receiver,thereby improving the intelligibility of the reconstructed speech.Furthermore,the degradation-informed model,combined with a multi-stage training strategy,further enhances the robustness and generalization of the proposed method in underwater acoustic channels.Finally,the proposed multi-receptive-field squeeze-and-excitation fusion module is employed in the speech reconstruction process to capture global semantic information within the semantic features,optimizing the intelligibility of the reconstructed speech.Simulation results demonstrate that the proposed method delivers excellent reconstruction performance under very low bit rate compression,in complex noise environments,and across various channel conditions.

关 键 词：水下语音通信 语音语义通信 低码率语音压缩 带噪语音 

分 类 号：TN929.3[电子电信—通信与信息系统]