Gutiérrez-Muñoz, M.; González-Salazar, A.; Coto-Jiménez, M. Evaluation of Mixed Deep Neural Networks for Reverberant Speech Enhancement. Biomimetics2020, 5, 1.
Gutiérrez-Muñoz, M.; González-Salazar, A.; Coto-Jiménez, M. Evaluation of Mixed Deep Neural Networks for Reverberant Speech Enhancement. Biomimetics 2020, 5, 1.
Gutiérrez-Muñoz, M.; González-Salazar, A.; Coto-Jiménez, M. Evaluation of Mixed Deep Neural Networks for Reverberant Speech Enhancement. Biomimetics2020, 5, 1.
Gutiérrez-Muñoz, M.; González-Salazar, A.; Coto-Jiménez, M. Evaluation of Mixed Deep Neural Networks for Reverberant Speech Enhancement. Biomimetics 2020, 5, 1.
Abstract
Speech signals are degraded in real-life environments, product of background noise or other factors. The processing of such signals for voice recognition and voice analysis systems presents important challenges. One of the conditions that make adverse quality difficult to handle in those systems is reverberation, produced by sound wave reflections that travel from the source to the microphone in multiple directions.To enhance signals in such adverse conditions, several deep learning-based methods have been proposed and proven to be effective. Recently, recurrent neural networks, especially those with long and short-term memory (LSTM), have presented surprising results in tasks related to time-dependent processing of signals, such as speech. One of the most challenging aspects of LSTM networks is the high computational cost of the training procedure, which has limited extended experimentation in several cases. In this work, we present a proposal to evaluate the hybrid models of neural networks to learn different reverberation conditions without any previous information. The results show that some combination of LSTM and perceptron layers produce good results in comparison to those from pure LSTM networks, given a fixed number of layers. The evaluation has been made based on quality measurements of the signal's spectrum, training time of the networks and statistical validation of results. Results help to affirm the fact that hybrid networks represent an important solution for speech signal enhancement, with advantages in efficiency, but without a significan drop in quality.
Keywords
artificial neural network; deep learning; LSTM; speech processing
Subject
Computer Science and Mathematics, Artificial Intelligence and Machine Learning
Copyright:
This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
