Emotional state and its impact on voice authentication accuracy
Miroslav Vozn̆ák, Pavol Partila, Marek Penhaker, Tomáš Peterek, Karel Tomala, Filip Řezáč, Jakub Šafařík · Proceedings of SPIE, the International Society for Optical Engineering/Proceedings of SPIE · 2013
The paper deals with the increasing accuracy of voice authentication methods. The developed algorithm first extracts segmental parameters, such as Zero Crossing Rate, the Fundamental Frequency and Mel-frequency cepstral coefficients from voice. Based on these parameters, the neural network classifier detects the speaker's emotional state. These parameters shape the distribution of neurons in Kohonen maps, forming clusters of neurons on the map characterizing a particular emotional state. Using regression analysis, we can calculate the function of the parameters of individual emotional states. This relationship increases voice authentication accuracy and prevents unjust rejection.