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Research on Speech Enhancement Algorithm by Fusing Improved EMD and GCRN Networks

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Abstract

Under the condition of low signal-to-noise ratio, for the problem of insufficient speech feature extraction and speech enhancement effect of the traditional neural network, this paper is based on empirical mode decomposition (EMD), temporal convolutional network (TCN), and gated convolution recurrent neural network (GCRN), while combining with feature fusion module (FFM), the adaptive mean median-empirical mode decomposition-multilayer gated feature fusion module convolutional recurrent neural networks (ME-MGFCRNs) for speech enhancement modeling. The network model uses a split-frequency learning strategy to learn low-frequency features and high-frequency features, i.e., the TCN and MGFCRN networks are used to obtain low-frequency and high-frequency features, and FFM processes the two sets of features to achieve speech enhancement in the form of feature mapping. The model proposed in this paper performs ablation and comparison experiments on the dataset to evaluate the enhancement effect of speech using PESQ, FwSegSNR, and STOI metrics. The research shows that under different noise environments and SNR conditions, the model proposed in this paper improves compared with other baseline models, especially under the low SNR condition of − 5 dB, FwSegSNR and PESQ improve by more than 0.86 dB and 0.02 compared with other baseline models.

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All the data included in this study are available upon request by contacting the corresponding author.

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Acknowledgements

This research was received by the natural science foundation of Heilongjiang Province (No. LH2020F033), the national natural science youth foundation of China (No. 11804068) and research project of the Heilongjiang Province Health Commission (No. 20221111001069).

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Author notes

  1. Chaofeng Lan and Zixu Fan have contributed equally to this work.

Authors and Affiliations

  1. School of Measurement and Communication Engineering, Harbin University of Science and Technology, Harbin, 150080, China

    Chaofeng Lan, Shilong Zhao, Rui Guo & Zixu Fan

  2. China Ship Development and Design Center, Wuhan, 430064, China

    Huan Chen

  3. Beidahuang Industry Group General Hospital, Harbin, 150088, China

    Lei Zhang

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  1. Chaofeng Lan
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  2. Huan Chen
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  3. Lei Zhang
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Correspondence to Lei Zhang or Shilong Zhao.

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Lan, C., Chen, H., Zhang, L. et al. Research on Speech Enhancement Algorithm by Fusing Improved EMD and GCRN Networks. Circuits Syst Signal Process (2024). https://doi.org/10.1007/s00034-024-02677-3

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