Abstract: This paper provides an overview of the historical evolution of speech recognition, synthesis, and processing technologies, highlighting the transition from statistical models to deep learning-based models. Firstly, the paper reviews the early development of speech processing, tracing it from the rule-based and statistical models of the 1960s to the deep learning models, such as deep neural networks (DNN), convolutional neural networks (CNN), and recurrent neural networks (RNN), which have dramatically reduced error rates in speech recognition and synthesis. It emphasizes how these advancements have led to more natural and accurate speech outputs. Then, the paper examines three key learning paradigms used in speech recognition: supervised, self-supervised, and semi-supervised learning. Supervised learning relies on large amounts of labeled data, while self-supervised and semi-supervised learning leverage unlabeled data to improve generalization and reduce reliance on manually labeled datasets. These paradigms have significantly advanced the field of speech recognition. Furthermore, the paper explores the wide-ranging applications of AI-driven speech processing, including smart homes, intelligent transportation, healthcare, and finance. By integrating AI with technologies like the Internet of Things (IoT) and big data, speech technology is being applied in voice assistants, autonomous vehicles, and speech-controlled devices. The paper also addresses the current challenges facing intelligent speech processing, such as performance issues in noisy environments, the scarcity of data for low-resource languages, and concerns related to data privacy, algorithmic bias, and legal responsibility. Overcoming these challenges will be crucial for the continued progress of the field. Finally, the paper looks to the future, predicting further improvements in speech processing technology through advancements in hardware and algorithms. It anticipates increased focus on personalized services, real-time speech processing, and multilingual support, along with growing integration with other technologies such as augmented reality. Despite the technical and ethical challenges, AI-driven speech processing is expected to continue its transformative impact on society and industry.

Ziqing Zhang, “AI-Powered Intelligent Speech Processing: Evolution, Applications and Future Directions” International Journal of Advanced Computer Science and Applications(IJACSA), 16(2), 2025. http://dx.doi.org/10.14569/IJACSA.2025.0160291

@article{Zhang2025,
title = {AI-Powered Intelligent Speech Processing: Evolution, Applications and Future Directions},
journal = {International Journal of Advanced Computer Science and Applications},
doi = {10.14569/IJACSA.2025.0160291},
url = {http://dx.doi.org/10.14569/IJACSA.2025.0160291},
year = {2025},
publisher = {The Science and Information Organization},
volume = {16},
number = {2},
author = {Ziqing Zhang}
}