Bandwidth Extension with Auditory Filters and Block-Adaptive Analysis

Bharitkar SG, Mauer T, Oppenheimer C, Wells T, Berfanger D. Bandwidth Extension with Auditory Filters and Block-Adaptive Analysis. In: AES Convention 144. Audio Engineering Society; 2018. Paper 9984. Available from: https://aes.org/publications/elibrary-page/?id=19501

@inproceedings{Bharitkar2018_19501,
  author = {Bharitkar, Sunil G. and Mauer, Timothy and Oppenheimer, Charles and Wells, Teresa and Berfanger, David},
  title = {{Bandwidth Extension with Auditory Filters and Block-Adaptive Analysis}},
  booktitle = {AES Convention 144},
  note = {Paper 9984},
  year = {2018},
  month = may,
  publisher = {Audio Engineering Society},
  url = {https://aes.org/publications/elibrary-page/?id=19501}
}

TY  - CPAPER
TI  - Bandwidth Extension with Auditory Filters and Block-Adaptive Analysis
AU  - Bharitkar, Sunil G.
AU  - Mauer, Timothy
AU  - Oppenheimer, Charles
AU  - Wells, Teresa
AU  - Berfanger, David
T2  - AES Convention 144
M1  - Paper 9984
PY  - 2018
DA  - 2018/05/06
UR  - https://aes.org/publications/elibrary-page/?id=19501
PB  - Audio Engineering Society
LA  - en
AB  - Bandwidth limits incurred by an audio signal due to low-excursion and narrow-bandwidth speakers reduces the perception of bass. A method to overcome this is to synthesize the harmonics of the fundamental frequency using side-chain processing. Depending on the input signal, intermodulation distortion could be introduced resulting in artifacts. A recent approach selects relevant portions of the low-frequency signal for reproduction using perceptually motivated filters, resulting in cleaner bass reproduction as confirmed through listening tests. However, one of the limitations is the need for large-duration frames or blocks (e.g., 5296 samples/block at 48 kHz) to obtain adequate frequency resolution at low-frequencies. In this paper we present an alternative approach that scales well in performance with respect to smaller block-sizes using 1/6-octave filterbank and power analysis.
ER  -