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An Interrogation Speech Manipulation Detection Method Using Speech Fingerprinting and Watermarking

  • Shinnya Takahashi
  • Kazuhiro Kondo
Conference paper
Part of the Smart Innovation, Systems and Technologies book series (SIST, volume 110)

Abstract

We proposed a manipulation detection method for interrogation speech. We used a robust fingerprinting method optimized for speech since our intended target is interrogation speech recorded during a police investigation. The fingerprint uses line spectral pairs (LSP) to measure the spectral envelope of the speech, and is coarsely quantized so that the fingerprint will not be altered by small degradation in the signal, but will be altered enough by malicious modifications to the speech content. This fingerprint is embedded in the speech signal using conventional spread-spectrum watermarks. To detect manipulation, the watermarked fingerprint is detected, and compared to the fingerprint extracted from the speech itself. If the fingerprints match within the predetermined tolerance, it can be authenticated to be unaltered. Otherwise, manipulation should be suspected.

We conducted manipulation detection on a frame by frame basis, and confirmed that we can correctly detect manipulation with noisy and reverberant speech in almost all of the substituted frames.

Keywords

Interrogation speech Manipulation detection Audio watermark Speech fingerprinting Line spectral pairs 

Notes

Acknowledgments

This work was supported in part by the Cooperative Research Project Program of the Research Institute of Electrical Communication, Tohoku University (H29/A18).

References

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Copyright information

© Springer Nature Switzerland AG 2019

Authors and Affiliations

  1. 1.Graduate School of Science and EngineeringYamagata UniversityYonezawaJapan

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