Robust Artificial Bandwidth Extension Technique Using Enhanced Parameter Estimation

Jeon J, Li Y, Kang S, Choo K, Oh E, Sung H. Robust Artificial Bandwidth Extension Technique Using Enhanced Parameter Estimation. In: AES Convention 137. Audio Engineering Society; 2014. Paper 9122. Available from: https://aes.org/publications/elibrary-page/?id=17445

@inproceedings{Jeon2014_17445,
  author = {Jeon, Jonggeun and Li, Yaxing and Kang, Sangwon and Choo, Kihyun and Oh, Eunmi and Sung, Hosang},
  title = {{Robust Artificial Bandwidth Extension Technique Using Enhanced Parameter Estimation}},
  booktitle = {AES Convention 137},
  note = {Paper 9122},
  year = {2014},
  month = oct,
  publisher = {Audio Engineering Society},
  url = {https://aes.org/publications/elibrary-page/?id=17445}
}

TY  - CPAPER
TI  - Robust Artificial Bandwidth Extension Technique Using Enhanced Parameter Estimation
AU  - Jeon, Jonggeun
AU  - Li, Yaxing
AU  - Kang, Sangwon
AU  - Choo, Kihyun
AU  - Oh, Eunmi
AU  - Sung, Hosang
T2  - AES Convention 137
M1  - Paper 9122
PY  - 2014
DA  - 2014/10/06
UR  - https://aes.org/publications/elibrary-page/?id=17445
PB  - Audio Engineering Society
LA  - en
AB  - We propose a robust artificial bandwidth extension (ABE) technique to improve the narrowband speech signal quality using enhanced excitation estimation and spectrum envelope. For excitation estimation, we use a whitened narrowband excitation signal, generated by passing the excitation signal through a whitening filter. An adaptive spectral double shifting method is introduced to obtain an enhanced wideband excitation signal. For envelope estimation, we propose an enhanced combined method using the codebook and linear mapping. The proposed ABE system is applied to the decoded output of an adaptive multi-rate (AMR) codec at 12.2 kbps. We evaluate its performance using spectral distortion, wideband perceptual evaluation of speech quality, and a formal listening test. The objective and subjective evaluation confirm that the proposed ABE system provides better speech quality than that of AMR at the same bit rate.
ER  -