DIHARD II is Still Hard: Experimental Results and Discussions from the DKU-LENOVO Team

Qingjian Lin, Weicheng Cai, Lin Yang, Junjie Wang, Jun Zhang, Ming Li


In this paper, we present the submitted system for the second DIHARD Speech Diarization Challenge from the DKU-LENOVO team. Our diarization system includes multiple modules, namely voice activity detection (VAD), segmentation, speaker embedding extraction, similarity scoring, clustering, resegmentation and overlap detection. For each module, we explore different techniques to enhance the performance. Our final submission employs the ResNet-LSTM based VAD, the Deep ResNet based speaker embedding, the LSTM based similarity scoring and spectral clustering. Variational Bayes (VB) diarization is applied in the resegmentation stage and overlap detection also brings slight improvement. Our proposed system achieves 18.84% DER in Track1 and 27.90% DER in Track2. Although our systems have reduced the DERs by 27.5% and 31.7% relatively against the official baselines, we believe that the diarization task is still very difficult.


 DOI: 10.21437/Odyssey.2020-15

Cite as: Lin, Q., Cai, W., Yang, L., Wang, J., Zhang, J., Li, M. (2020) DIHARD II is Still Hard: Experimental Results and Discussions from the DKU-LENOVO Team. Proc. Odyssey 2020 The Speaker and Language Recognition Workshop, 102-109, DOI: 10.21437/Odyssey.2020-15.


@inproceedings{Lin2020,
  author={Qingjian Lin and Weicheng Cai and Lin Yang and Junjie Wang and Jun Zhang and Ming Li},
  title={{DIHARD II is Still Hard: Experimental Results and Discussions from the DKU-LENOVO Team}},
  year=2020,
  booktitle={Proc. Odyssey 2020 The Speaker and Language Recognition Workshop},
  pages={102--109},
  doi={10.21437/Odyssey.2020-15},
  url={http://dx.doi.org/10.21437/Odyssey.2020-15}
}