Zero-Crossing-Based Feature Extraction for Voice Command Systems Using Neck-Microphones

  • Sang Kyoon Park
  • Rhee Man Kil
  • Young-Giu Jung
  • Mun-Sung Han
Conference paper
Part of the Lecture Notes in Computer Science book series (LNCS, volume 4491)


This paper presents zero-crossing-based feature extraction for the speech recognition using neck-microphones. One of the solutions in noise-robust speech recognition is using neck-microphones which are not affected by the environmental noises. However, neck-microphones distort the original voice signals significantly since they only capture the vibrations of vocal tracts. In this context, we consider a new method of enhancing speech features of neck-microphone signals using zero-crossings. Furthermore, for the improvement of zero-crossing features, we consider to use the statistics of two adjacent zero-crossing intervals, that is, the statistics of two samples referred to as the second order statistics. Through the simulation for speech recognition using the neck-microphone voice command system, we have shown that the suggested method provides the better performance than other approaches using conventional speech features.


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Copyright information

© Springer-Verlag Berlin Heidelberg 2007

Authors and Affiliations

  • Sang Kyoon Park
    • 1
  • Rhee Man Kil
    • 1
  • Young-Giu Jung
    • 2
  • Mun-Sung Han
    • 2
  1. 1.Division of Applied Mathematics, Korea Advanced Institute of Science and Technology, 373-1 Guseong-dong, Yuseong-gu, Daejeon 305-701Korea
  2. 2.Smart Interface Research Team, Electronics and Telecommunications Research Institute, 161 Gajeong-dong, Yuseong-gu, Daejeon 305-700Korea

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