Frequency-Domain Implementation of Time-Varying FIR Filters

Vickers E. Frequency-Domain Implementation of Time-Varying FIR Filters. In: AES Convention 133. Audio Engineering Society; 2012. Paper 8784. Available from: https://aes.org/publications/elibrary-page/?id=16526

@inproceedings{Vickers2012_16526,
  author = {Vickers, Earl},
  title = {{Frequency-Domain Implementation of Time-Varying FIR Filters}},
  booktitle = {AES Convention 133},
  note = {Paper 8784},
  year = {2012},
  month = oct,
  publisher = {Audio Engineering Society},
  url = {https://aes.org/publications/elibrary-page/?id=16526}
}

TY  - CPAPER
TI  - Frequency-Domain Implementation of Time-Varying FIR Filters
AU  - Vickers, Earl
T2  - AES Convention 133
M1  - Paper 8784
PY  - 2012
DA  - 2012/10/06
UR  - https://aes.org/publications/elibrary-page/?id=16526
PB  - Audio Engineering Society
LA  - en
AB  - Finite impulse response filters can be implemented efficiently by means of fast convolution in the frequency domain. However, in applications such as speech enhancement or channel upmix, where the filter is a time-varying function of the input signal, standard approaches can suffer from artifacts and distortion due to circular convolution and the resulting time-domain aliasing. Existing solutions can be computationally prohibitive. This paper compares a number of previous algorithms and presents an alternate method based on the equivalence between frequency-domain convolution and time domain windowing. Additional computational efficiency can be attained by careful choice of the analysis window.
ER  -