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arXiv 2011.07547eess.AS
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以语音存在概率为次要任务训练目标的多任务单通道语音增强

Multi-task single channel speech enhancement using speech presence probability as a secondary task training target

L. Wang, J. Zhu, I. Kodrasi

摘要:

为了应对单通道声学场景中的混响和噪声,典型的基于监督的深度神经网络(DNN)的技术学习从混响和噪声输入特征到用户定义的目标的映射。通常使用的目标是期望的信号幅度、时间-频率掩模(例如维纳增益)或干扰功率谱密度和可用于计算时间-频率掩模的信号干扰比。在本文中,我们建议将多任务学习纳入这种基于DNN的增强技术中,通过使用语音存在概率(SPP)估计作为辅助主要任务中的目标估计的次要任务。多任务学习的优点在于在两个任务之间共享领域特定的信息(即,目标和SPP估计)和学习更通用和鲁棒的表示。为了同时学习这两个任务,我们建议使用自适应加权方法的损失来自任务的同方差的不确定性。仿真结果表明,训练成直接估计维纳增益的单任务DNN的去混响和降噪性能高于训练成估计期望信号幅度、干扰功率谱密度或信号干扰比的单任务DNN的性能。将所提出的多任务学习方案用于联合估计维纳增益和SPP进一步增加了去混响和降噪。

英文摘要:

To cope with reverberation and noise in single channel acoustic scenarios, typical supervised deep neural network~(DNN)-based techniques learn a mapping from reverberant and noisy input features to a user-defined target. Commonly used targets are the desired signal magnitude, a time-frequency mask such as the Wiener gain, or the interference power spectral density and signal-to-interference ratio that can be used to compute a time-frequency mask. In this paper, we propose to incorporate multi-task learning in such DNN-based enhancement techniques by using speech presence probability (SPP) estimation as a secondary task assisting the target estimation in the main task. The advantage of multi-task learning lies in sharing domain-specific information between the two tasks (i.e., target and SPP estimation) and learning more generalizable and robust representations. To simultaneously learn both tasks, we propose to use the adaptive weighting method of losses derived from the homoscedastic uncertainty of tasks. Simulation results show that the dereverberation and noise reduction performance of a single-task DNN trained to directly estimate the Wiener gain is higher than the performance of single-task DNNs trained to estimate the desired signal magnitude, the interference power spectral density, or the signal-to-interference ratio. Incorporating the proposed multi-task learning scheme to jointly estimate the Wiener gain and the SPP increases the dereverberation and noise reduction further.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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