Correction of Crossover Phase Distortion Using Reversed Time All-Pass IIR Filter

Adam V, Benz S. Correction of Crossover Phase Distortion Using Reversed Time All-Pass IIR Filter. In: AES Convention 122. Audio Engineering Society; 2007. Paper 7111. Available from: https://aes.org/publications/elibrary-page/?id=14096

@inproceedings{Adam2007_14096,
  author = {Adam, Veronique and Benz, Sebastien},
  title = {{Correction of Crossover Phase Distortion Using Reversed Time All-Pass IIR Filter}},
  booktitle = {AES Convention 122},
  note = {Paper 7111},
  year = {2007},
  month = may,
  publisher = {Audio Engineering Society},
  url = {https://aes.org/publications/elibrary-page/?id=14096}
}

TY  - CPAPER
TI  - Correction of Crossover Phase Distortion Using Reversed Time All-Pass IIR Filter
AU  - Adam, Veronique
AU  - Benz, Sebastien
T2  - AES Convention 122
M1  - Paper 7111
PY  - 2007
DA  - 2007/05/06
UR  - https://aes.org/publications/elibrary-page/?id=14096
PB  - Audio Engineering Society
LA  - en
AB  - The purpose of this paper is to describe a correction implementation of group delay distortion arising from a two-way loudspeaker system crossover. Having determined an IIR all-pass filter having a group delay response corresponding to that of the system crossover to be corrected, we have validated under Matlab and implemented in DSP the time reversal solution proposed by S.A. Azizi,. S.R. Powell and P. M. Chau, enabling an IIR filter to be inversed, whilst retaining stability and causality. In addition to theory and calculation validation, we have also carried out preliminary listening tests, supporting the evaluation of timber modification, sound clarity and space localisation due to the group delay distortion correction.
ER  -