Utterance Clustering Using Stereo Audio Channels
Abstract
Utterance clustering is one of the actively researched topics in audio signal processing and machine learning. This study aims to improve the performance of utterance clustering by processing multichannel (stereo) audio signals. Processed audio signals were generated by combining left- and right-channel audio signals in a few different ways and then by extracting the embedded features (also called d-vectors) from those processed audio signals. This study applied the Gaussian mixture model for supervised utterance clustering. In the training phase, a parameter-sharing Gaussian mixture model was obtained to train the model for each speaker. In the testing phase, the speaker with the maximum likelihood was selected as the detected speaker. Results of experiments with real audio recordings of multiperson discussion sessions showed that the proposed method that used multichannel audio signals achieved significantly better performance than a conventional method with mono-audio signals in more complicated conditions.
Document Details
- Document Type
- Pub Defense Publication
- Publication Date
- Sep 25, 2021
- Source ID
- 10.1155/2021/6151651
Entities
People
- Francis J. Yammarino
- Gregory A. Ruark
- Hiroki Sayama
- Michael D. Mumford
- Neil G. MacLaren
- Shane Connelly
- Shelley D. Dionne
- Yiding Cao
- Yingjun Dong
Organizations
- Binghamton University
- U.S. Army Research Institute for the Behavioral and Social Sciences
- University of Oklahoma