Genetic Algorithm for Combined Speaker and Speech Recognition using Deep Neural Networks

摘要

Huge growth is observed in the speech and speaker recognition field due to many artificial intelligence algorithms being applied. Speech is used to convey messages via the lan- guage being spoken, emotions, gender and speaker identity. Many real applications in healthcare are based upon speech and speaker recognition, e.g. a voice-controlled wheelchair helps control the chair. In this paper, we use a genetic algo- rithm (GA) for combined speaker and speech recognition, rely- ing on optimized Mel Frequency Cepstral Coefficient (MFCC) speech features, and classification is performed using a Deep Neural Network (DNN). In the first phase, feature extraction using MFCC is executed. Then, feature optimization is per- formed using GA. In the second phase training is conducted using DNN. Evaluation and validation of the proposed work model is done by setting a real environment, and efficiency is calculated on the basis of such parameters as accuracy, precision rate, recall rate, sensitivity, and specificity. Also, this paper presents an evaluation of such feature extraction methods as linear predictive coding coefficient (LPCC), per- ceptual linear prediction (PLP), mel frequency cepstral coef- ficients (MFCC) and relative spectra filtering (RASTA), with all of them used for combined speaker and speech recogni- tion systems. A comparison of different methods based on existing techniques for both clean and noisy environments is made as well.