Estimating Nonlinear Impulse Response Length using Time-Delayed Mutual Information

Hoerr ER, Maher RC. Estimating Nonlinear Impulse Response Length using Time-Delayed Mutual Information. In: AES Convention 149. Audio Engineering Society; 2020. Paper 10416. Available from: https://aes.org/publications/elibrary-page/?id=20953

@inproceedings{Hoerr2020_20953,
  author = {Hoerr, Ethan R, and Maher, Robert C},
  title = {{Estimating Nonlinear Impulse Response Length using Time-Delayed Mutual Information}},
  booktitle = {AES Convention 149},
  note = {Paper 10416},
  year = {2020},
  month = oct,
  publisher = {Audio Engineering Society},
  url = {https://aes.org/publications/elibrary-page/?id=20953}
}

TY  - CPAPER
TI  - Estimating Nonlinear Impulse Response Length using Time-Delayed Mutual Information
AU  - Hoerr, Ethan R,
AU  - Maher, Robert C
T2  - AES Convention 149
M1  - Paper 10416
PY  - 2020
DA  - 2020/10/06
UR  - https://aes.org/publications/elibrary-page/?id=20953
PB  - Audio Engineering Society
LA  - en
AB  - Using impulse responses measured from various audio systems has become common in audio signal processing. However, determining the length of an impulse response captured from a nonlinear system becomes problematic, as these systems violate the linearity principle from signals and systems theory. A “lumpy” or “spiky” tail in the measured impulse response of a nonlinear system is a tell-tale symptom of this issue. In this in-progress work, we investigate the use of time-delayed mutual information (TDMI), a concept from the field of information theory, to identify the useful portion of a recovered nonlinear impulse response. Initial test systems include linear, time-invariant FIR and IIR filters, and IIR filters with a static nonlinear distortion added.
ER  -