Optimization of computer aided english pronunciation teaching system based on speech signal processing technology

After the development of speech signal processing technology has matured, various language learning tools have begun to emerge. The speech signal processing technology has many functions, such as standard tape reading, making audio aids, synthesizing speech, and performing speech evaluation. Therefore, the adoption of speech signal processing technology in English pronunciation teaching can meet different teaching needs. Voice signal processing technology can present teaching information in different forms, and promote multi-form communication between teachers and students, and between students and students. This will help stimulate students' interest in learning English and improve the overall teaching level of English pronunciation. This research first investigates and studies the current level of English pronunciation mastery. After combining the relevant principles of speech signal processing technology, it puts forward the areas that need to be optimized in the design of the English pronunciation teaching system. Through the demand analysis and function analysis of the system, this research uses speech signal processing technology to extract the characteristics of the speech signal---Mel Frequency Cepstrum Coefficient (MFCC), The system's speech signal preprocessing, speech signal feature extraction and dynamic time warping (DTW) recognition algorithms are optimized. At the same time, this research combines multimedia teaching resources such as text, pronunciation video and excellent courses to study the realization process of each function of the system. © 2020 CAD Solutions, LLC.