Splitting the unit delay [FIR/all pass filters design]

@article{Laakso1996SplittingTU,
  title={Splitting the unit delay [FIR/all pass filters design]},
  author={Timo I. Laakso and Vesa V{\"a}lim{\"a}ki and Matti Karjalainen and Unto K. Laine},
  journal={IEEE Signal Process. Mag.},
  year={1996},
  volume={13},
  pages={30-60}
}
A fractional delay filter is a device for bandlimited interpolation between samples. It finds applications in numerous fields of signal processing, including communications, array processing, speech processing, and music technology. We present a comprehensive review of FIR and allpass filter design techniques for bandlimited approximation of a fractional digital delay. Emphasis is on simple and efficient methods that are well suited for fast coefficient update or continuous control of the delay… 
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