Blind Bandwidth Extension System Utilizing Advanced Spectral Envelope Predictor

Choo K, Porov A, Oh E. Blind Bandwidth Extension System Utilizing Advanced Spectral Envelope Predictor. In: AES Convention 138. Audio Engineering Society; 2015. Paper 9262. Available from: https://aes.org/publications/elibrary-page/?id=17686

@inproceedings{Choo2015_17686,
  author = {Choo, Kihyun and Porov, Anton and Oh, Eunmi},
  title = {{Blind Bandwidth Extension System Utilizing Advanced Spectral Envelope Predictor}},
  booktitle = {AES Convention 138},
  note = {Paper 9262},
  year = {2015},
  month = may,
  publisher = {Audio Engineering Society},
  url = {https://aes.org/publications/elibrary-page/?id=17686}
}

TY  - CPAPER
TI  - Blind Bandwidth Extension System Utilizing Advanced Spectral Envelope Predictor
AU  - Choo, Kihyun
AU  - Porov, Anton
AU  - Oh, Eunmi
T2  - AES Convention 138
M1  - Paper 9262
PY  - 2015
DA  - 2015/05/06
UR  - https://aes.org/publications/elibrary-page/?id=17686
PB  - Audio Engineering Society
LA  - en
AB  - We propose a blind bandwidth extension (BWE) technique that improves the quality of a narrow-band speech signal using time domain extension and spectral envelope prediction in the frequency domain. In the time domain, we use a spectral double shifting method. Further, a new spectral envelope predictor is introduced in the frequency domain. We observe less distortion when the attribute is transferred from low to high frequency, instead of reflecting the original high band. The proposed blind BWE system is applied to the decoded output of an adaptive multi-rate (AMR) codec at 12.2 kbps to generate a high-frequency spectrum from 4 to 8 kHz. The blind BWE was objectively evaluated with the AMR and AMR wideband codecs and subjectively evaluated by comparing it with the AMR.
ER  -