Investigations on Nonlinearity in a Gammatone Filter Bank Based Perceptual Model

Hou Y, Schaller F, Schäfer P, Meier PE, Meier B. Investigations on Nonlinearity in a Gammatone Filter Bank Based Perceptual Model. In: Convention Paper. Audio Engineering Society; 2026.pp. 10282:1-9. Available from: https://aes.org/publications/elibrary-page/?id=23220

@inproceedings{Hou2026_23220,
  author = {Hou, Yaqiong and Schaller, Fabian and Schäfer, Paula and Meier, Paul Emil and Meier, Bernd},
  title = {{Investigations on Nonlinearity in a Gammatone Filter Bank Based Perceptual Model}},
  pages = {10282:1-9},
  url = {https://aes.org/publications/elibrary-page/?id=23220},
  year = {2026},
  month = may,
  publisher = {Audio Engineering Society},
  address = {Copenhagen Denmark}
}

TY  - CPAPER
TI  - Investigations on Nonlinearity in a Gammatone Filter Bank Based Perceptual Model
AU  - Hou, Yaqiong
AU  - Schaller, Fabian
AU  - Schäfer, Paula
AU  - Meier, Paul Emil
AU  - Meier, Bernd
SP  - 1
EP  - 9
M1  - Paper 10282
PY  - 2026
DA  - 2026/05/28
UR  - https://aes.org/publications/elibrary-page/?id=23220
PB  - Audio Engineering Society
CY  - Copenhagen Denmark
LA  - en
AB  - Perceptual models are playing an important role in effectively balancing the data compression and fidelity in audio encoders by leveraging the masking effects in human auditory perception. For deriving well suitable masking thresholds, considering tonality is important. In this study, a novel filter bank is proposed, which uses narrow complex-valued all-pole gammatone filters followed by a non-linear spectral spreading processing. With an appropriate non-linear mapping before spreading, and inverse non-linear mapping afterwards, differences between masking strengths of tonal and noise-like maskers can be directly obtained without explicit tonality estimation. By applying a suitable non-linearity, level-dependency of spectral spreading in the human auditory system can also be modeled. The performance of the proposed approach is evaluated through subjective listening tests, which include comparisons with results obtained using partial spectral flatness measures.
ER  -