Sentiment analysis in non-fixed length audios using a Fully Convolutional Neural Network
María Teresa García-Ordás, Héctor Aláiz‐Moretón, José Alberto Benítez‐Andrades, Isaías García-Rodríguez, Óscar García-Olalla, Carmen Benavides
Abstract
In this work, a sentiment analysis method that is capable of accepting audio of any length, without being fixed a priori, is proposed. Mel spectrogram and Mel Frequency Cepstral Coefficients are used as audio description methods and a Fully Convolutional Neural Network architecture is proposed as a classifier. The results have been validated using three well known datasets: EMODB, RAVDESS and TESS. The results obtained were promising, outperforming the state-of–the-art methods. Also, thanks to the fact that the proposed method admits audios of any size, it allows a sentiment analysis to be made in near real time, which is very interesting for a wide range of fields such as call centers, medical consultations or financial brokers.