摘要:
语音增强是提高语音质量与可懂度的关键技术，在语音识别、语音通话、电话会议和听力辅助等领域具有广泛应用前景与重要研究价值.从模型方法、数据集、特征、评估指标等方面，对单声道语音增强研究工作的发展现状进行了全面调研和深入分析.1)对传统的与基于机器学习的单声道语音降噪以及语音去混响的已有研究工作进行了梳理分类，简要介绍了典型方法的研究思路，并对不同方法的实验结果进行了综合比较；2)对在实验与结果评估过程中所涉及到的常用数据集、常见特征、学习目标与评估指标等进行了整理与介绍；3)对目前单声道语音增强仍然面临的主要问题与挑战进行了总结.
Abstract:
Speech enhancement refers to the use of audio signal processing techniques and various algorithms to improve the intelligibility and quality of the distorted speech signals. It has great research value and a wide range of applications including speech recognition, VoIP, tele-conference and hearing aids. Most early work utilized unsupervised digital signal analysis methods to decompose the speech signal to obtain the characteristics of the clean speech and the noise. With the development of machine learning, some supervised methods which aim to learn the relationship between noisy and clean speech signals were proposed. In particular, the introduction of deep learning has greatly improved the performance. In order to help beginners and related researchers to understand the current research status of this topic, this paper conducts a comprehensive survey of the development process of the monaural speech enhancement, and systematically summarizes from the aspect of model methods, datasets, features, evaluation metrics, etc. First, we divide speech enhancement into noise reduction and de-reverberation, then respectively sort out the existing work of traditional and machine-learning-based methods in these two directions. Moreover, we briefly introduce the main ideas of typical solutions, and compare the performance of different methods. Then, commonly used datasets, features, learning objectives and evaluation metrics in experiments are enumerated and illustrated. Finally, four major challenges and corresponding issues in this area are summarized.
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