A comprehensive survey on automatic speech recognition using neural networks

The continuous development in Automatic Speech Recognition has grown and demonstrated its enormous potential in Human Interaction Communication systems. It is quite a challenging task to achieve high accuracy due to several parameters such as different dialects, spontaneous speech, speaker's enrolment, computation power, dataset, and noisy environment that decrease the performance of the speech recognition system. It has motivated various researchers to make innovative contributions to the development of a robust speech recognition system. The study presents a systematic analysis of current state-of-the-art research work done in this field during 2015-2021. The prime focus of the study is to highlight the neural network-based speech recognition techniques, datasets, toolkits, and evaluation metrics utilized in the past seven years. It also synthesizes the evidence from past studies to provide empirical solutions for accuracy improvement. This study highlights the current status of speech recognition systems using neural networks and provides a brief knowledge to the new researchers.