Publication Details

Effective Phase Encoding for End-To-End Speaker Verification

PENG, J.; QU, X.; GU, R.; WANG, J.; XIAO, J.; BURGET, L.; ČERNOCKÝ, J. Effective Phase Encoding for End-To-End Speaker Verification. In Proceedings Interspeech 2021. Proceedings of Interspeech. Brno: International Speech Communication Association, 2021. p. 2366-2370. ISSN: 1990-9772.
Czech title
Efektivní modelování fáze v end-to-end rozpoznávání mluvčího
Type
conference paper
Language
English
Authors
URL
Keywords

end-to-end speaker verification, phase information, group delay, on-the-fly

Abstract

The widely used magnitude spectrum based features have shown their superiority in the field of speech processing. In contrast, the importance of phase spectrum is always ignored. This is because the patterns hidden in phase cannot be intuitively modelled and interpreted, due to phase wrapping phenomenon. In this paper, we explore novel phase spectrum based features, named Learnable Group Delay (LearnGD), to capture useful information in speech signals. Specifically, firstly, the negative of the spectral derivative of the phase spectrum, called group delay (GD), is used to unwrap the phase. Then, to suppress the spiky nature of GD, which is caused by its roots close to the unit circle in the Z domain, a carefully designed light convolutional smoothing layer is employed to reconstruct the GD. Finally, an exponential hyper-parameter is introduced to reconstruct GD features to restore the spectrum range and generate LearnGD features. For performance evaluation, speaker verification experiments are conducted on the VoxCeleb2 corpus. Compared to the traditional acoustic feature derived from the magnitude spectrum, the proposed phase-based features reach a 27.8% relative improvement in terms of EER. Furthermore, experimental results on TIMIT phoneme recognition task also demonstrate the effectiveness of our proposed phase-based features.

Published
2021
Pages
2366–2370
Journal
Proceedings of Interspeech, vol. 2021, no. 8, ISSN 1990-9772
Proceedings
Proceedings Interspeech 2021
Publisher
International Speech Communication Association
Place
Brno
DOI
UT WoS
000841879502096
EID Scopus
BibTeX
@inproceedings{BUT175842,
  author="PENG, J. and QU, X. and GU, R. and WANG, J. and XIAO, J. and BURGET, L. and ČERNOCKÝ, J.",
  title="Effective Phase Encoding for End-To-End Speaker Verification",
  booktitle="Proceedings Interspeech 2021",
  year="2021",
  journal="Proceedings of Interspeech",
  volume="2021",
  number="8",
  pages="2366--2370",
  publisher="International Speech Communication Association",
  address="Brno",
  doi="10.21437/Interspeech.2021-2025",
  issn="1990-9772",
  url="https://www.isca-speech.org/archive/interspeech_2021/peng21c_interspeech.html"
}
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