16. Efficient Multi-tone Detection

  1. Richard G. Lyons
  1. Vladimir Vassilevsky

Published Online: 11 JUN 2012

DOI: 10.1002/9781118316948.ch16

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

Vassilevsky, V. (2012) Efficient Multi-tone Detection, 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.ch16

Editor Information

  1. Besser Associates, Mountain View, California, USA

Author Information

  1. Abvolt Ltd., Perry, Oklahoma, 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:

  • efficient multi-tone detection;
  • processing tricks, in other multi-tone, for spectral tones;
  • downconversion multiplication, using simple XOR operation;
  • validity satisfied, true DTMF tones from speech, and in speech pause

Summary

This chapter contains sections titled:

  • Multi-Tone Detection

  • Complex Downconversion

  • Lowpass Filtering

  • Magnitude Approximation

  • Validity Checking

  • Implementation Issues

  • Other Considerations

  • References

  • Editor Comments