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A customized residual neural network and bi-directional gated recurrent unit-based automatic speech recognition model

ISSN: 0957-4174 ;EISSN: 1873-6793 ;DOI: 10.1016/j.eswa.2022.119293

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  • Title:
    A customized residual neural network and bi-directional gated recurrent unit-based automatic speech recognition model
  • Author: Selim Reza ; Marta Campos Ferreira ; J.J.M. Machado ; João Manuel R. S. Tavares
  • Subjects: Ciências da engenharia e tecnologias ; Ciências Tecnológicas ; Engineering and technology ; Technological sciences
  • Description: Speech recognition aims to convert human speech into text and has applications in security, healthcare, commerce, automobiles, and technology, just to name a few. Inserting residual neural networks before recurrent neural network cells improves accuracy and cuts training time by a good margin. Furthermore, layer normalization instead of batch normalization is more effective in model training and performance enhancement. Also, the size of the datasets presents tremendous influences in achieving the best performance. Leveraging these tricks, this article proposes an automatic speech recognition model with a stacked five layers of customized Residual Convolution Neural Network and seven layers of Bi-Directional Gated Recurrent Units, including a logarithmic so f tmax for the model output. Each of them incorporates a learnable per-element affine parameter-based layer normalization technique. The training and testing of the new model were conducted on the LibriSpeech corpus and LJ Speech dataset. The experimental results demonstrate a character error rate (CER) of 4.7 and 3.61% on the two datasets, respectively, with only 33 million parameters without the requirement of any external language model.
  • Creation Date: 2022-04
  • Language: English
  • Identifier: ISSN: 0957-4174
    EISSN: 1873-6793
    DOI: 10.1016/j.eswa.2022.119293
  • Source: Universidade do Porto Institutional Repository Open Access
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