17. Turning Overlap-Save into a Multiband, Mixing, Downsampling Filter Bank

  1. Richard G. Lyons
  1. Mark Borgerding

Published Online: 11 JUN 2012

DOI: 10.1002/9781118316948.ch17

Streamlining Digital Signal Processing: A Tricks of the Trade Guidebook, Second Edition

Streamlining Digital Signal Processing: A Tricks of the Trade Guidebook, Second Edition

How to Cite

Borgerding, M. (2012) Turning Overlap-Save into a Multiband, Mixing, Downsampling Filter Bank, in Streamlining Digital Signal Processing: A Tricks of the Trade Guidebook, Second Edition (ed R. G. Lyons), John Wiley & Sons, Inc., Hoboken, NJ, USA. doi: 10.1002/9781118316948.ch17

Editor Information

  1. Besser Associates, Mountain View, California, USA

Author Information

  1. 3dB Labs, Inc., Cincinnati, Ohio, USA

Publication History

  1. Published Online: 11 JUN 2012
  2. Published Print: 22 JUN 2012

ISBN Information

Print ISBN: 9781118278383

Online ISBN: 9781118316948

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Keywords:

  • turning overlap-save into a multiband, mixing, downsampling filter bank;
  • overlap-save fast convolution, creating efficient bank of filters;
  • FFT size, complexity and filter length with overlap factor;
  • frequency spectrum shifting by mixing frequency, DFT sequence rotation

Summary

This chapter contains sections titled:

  • Something Old and Something New

  • Review of Fast Convolution

  • Choosing FFT Size: Complexity is Related to Filter Length and Overlap Factor

  • Filtering Multiple Channels: Reuse the Forward FFT

  • Frequency Domain Downsampling: Aliasing is Your Friend

  • Mixing and OS Filtering: Rotate the Frequency Domain for Coarse Mixing

  • Putting it All Together

  • Food for Thought

  • Conclusions

  • Editor Comments

  • References