Adaptive Low-frequency Extension Using Auditory Filterbanks

Bharitkar SG, Mauer T, Oppenheimer C, Wells T, Berfanger D. Adaptive Low-frequency Extension Using Auditory Filterbanks. In: AES Convention 143. Audio Engineering Society; 2017. Paper 9881. Available from: https://aes.org/publications/elibrary-page/?id=19278

@inproceedings{Bharitkar2017_19278,
  author = {Bharitkar, Sunil G. and Mauer, Timothy and Oppenheimer, Charles and Wells, Teresa and Berfanger, David},
  title = {{Adaptive Low-frequency Extension Using Auditory Filterbanks}},
  booktitle = {AES Convention 143},
  note = {Paper 9881},
  year = {2017},
  month = oct,
  publisher = {Audio Engineering Society},
  url = {https://aes.org/publications/elibrary-page/?id=19278}
}

TY  - CPAPER
TI  - Adaptive Low-frequency Extension Using Auditory Filterbanks
AU  - Bharitkar, Sunil G.
AU  - Mauer, Timothy
AU  - Oppenheimer, Charles
AU  - Wells, Teresa
AU  - Berfanger, David
T2  - AES Convention 143
M1  - Paper 9881
PY  - 2017
DA  - 2017/10/06
UR  - https://aes.org/publications/elibrary-page/?id=19278
PB  - Audio Engineering Society
LA  - en
AB  - Microspeakers used in mobile devices and PCs have band-limited frequency response, from constraining small drivers in tight enclosures, resulting in the loss of low-frequency playback content. The lack of low-frequencies in turn degrades the audio quality and perceived loudness. A method to overcome this physical limitation is to leverage the auditory phenomena of the missing fundamental; where by synthesizing the harmonic structure decodes the missing fundamental frequency. The proposed approaches employs side-chain processing for synthesizing the harmonics with only dominant portions of the low-frequency signal using critical-band filters. Additionally a parametric filter is used to shape the harmonics. Listening tests reveal that the proposed technique is preferred in terms of both the overall sound quality and the bass-only quality.
ER  -