Improved design of oversampled allpass transformed DFT filter-banks with near-perfect reconstruction

@article{Lllmann2007ImprovedDO,
  title={Improved design of oversampled allpass transformed DFT filter-banks with near-perfect reconstruction},
  author={Heinrich W. L{\"o}llmann and Peter Vary},
  journal={2007 15th European Signal Processing Conference},
  year={2007},
  pages={50-54}
}
In this paper, the design of oversampled allpass transformed analysis-synthesis filter-banks is treated, which can be employed for non-uniform subband processing. Near-perfect reconstruction can be achieved by a synthesis filter-bank design which uses phase equalizers to compensate the phase modifications due to the allpass transformation of the analysis filter-bank. It is shown that an FIR phase equalizer, which is obtained by a least-squares approximation of the desired non-causal IIR phase… CONTINUE READING