ISCA Archive Interspeech 2013
ISCA Archive Interspeech 2013

Artificial bandwidth extension based on regularized piecewise linear mapping with discriminative region weighting and long-Span features

Nguyen Duc Duy, Masayuki Suzuki, Nobuaki Minematsu, Keikichi Hirose

Artificial Bandwidth Extension (ABE) has been introduced to improve perceived speech quality and intelligibility of narrow-band telephone speech. Most of the existing algorithms divided ABE into 2 sub-problems, namely extension of the excitation signal and that of the spectral envelope. In this paper, we propose a new method for spectral envelope extension based on REgularized piecewise linear mapping with DIscriminative region weighting And Longspan features (REDIAL). REDIAL is a revised version of SPLICE, a well-known method for speech enhancement. In REDIAL, however, discriminative model is introduced for space division step of the original SPLICE. The proposed REDIAL-based method approximates non-linear transformation from narrowband features to their wideband counterpart by a summation of piecewise linear transformations. The proposed method was compared with the widely used GMM-based method, through objective and subjective evaluations in both speaker-dependent and speaker-independent conditions. Both evaluations showed that the proposed method significantly outperforms the conventional GMM-based method.


doi: 10.21437/Interspeech.2013-756

Cite as: Duy, N.D., Suzuki, M., Minematsu, N., Hirose, K. (2013) Artificial bandwidth extension based on regularized piecewise linear mapping with discriminative region weighting and long-Span features. Proc. Interspeech 2013, 3453-3457, doi: 10.21437/Interspeech.2013-756

@inproceedings{duy13_interspeech,
  author={Nguyen Duc Duy and Masayuki Suzuki and Nobuaki Minematsu and Keikichi Hirose},
  title={{Artificial bandwidth extension based on regularized piecewise linear mapping with discriminative region weighting and long-Span features}},
  year=2013,
  booktitle={Proc. Interspeech 2013},
  pages={3453--3457},
  doi={10.21437/Interspeech.2013-756}
}