Omilia- Conversational Intelligence, Athens, Greece
Brno University of Technology, Faculty of Information Technology, Speech@FIT, Czechia
University of Helsinki, Finland
DOI. (10.1109/SLT54892.2023.10023345)
Self-supervised learning of speech representations from large amounts of unlabeled data has enabled state-of-the-art results in several speech processing tasks. Aggregating these speech representations across time is typically approached by using descriptive statistics, and in particular, using the first - and second-order statistics of representation coefficients.
In this paper, we examine an alternative way of extracting speaker and emotion information from self-supervised trained models, based on the correlations between the coefficients of the representations - correlation pooling. We show improvements over mean pooling and further gains when the pooling methods are combined via fusion. The code is available at github.com/Lamomal/s3prl_correlation.
