A Study on Speech Recognition by a Neural Network Based on English Speech Feature Parameters

• Published in: Journal of advanced computational intelligence and intelligent informatics Vol. 28; no. 3; pp. 679 - 684
• Main Authors: Mao, Congmin, Liu, Sujing
• Format: Journal Article
• Language: English
• Published: Tokyo Fuji Technology Press Co. Ltd 01.05.2024
• Subjects: Algorithms; Artificial neural networks; Back propagation networks; Filter banks; Neural networks; Parameters; Recurrent neural networks; Speech; Speech recognition; Voice recognition
• ISSN: 1343-0130; 1883-8014
• DOI: 10.20965/jaciii.2024.p0679

In this study, from the perspective of English speech feature parameters, two feature parameters, the mel-frequency cepstral coefficient (MFCC) and filter bank (Fbank), were selected to identify English speech. The algorithms used for recognition employed the classical back-propagation neural network (BPNN), recurrent neural network (RNN), and long short-term memory (LSTM) that were obtained by improving RNN. The three recognition algorithms were compared in the experiments, and the effects of the two feature parameters on the performance of the recognition algorithms were also compared. The LSTM model had the best identification performance among the three neural networks under different experimental environments; the neural network model using the MFCC feature parameter outperformed the neural network using the Fbank feature parameter; the LSTM model had the highest correct rate and the highest speed, while the RNN model ranked second, and the BPNN model ranked worst. The results confirm that the application of the LSTM model in combination with MFCC feature parameter extraction to English speech recognition can achieve higher speech recognition accuracy compared to other neural networks.