An interference-free representation of group delay for periodic signals

This article introduces a new group delay representation for periodic signals. The proposed method yields a group delay representation that is free from interferences due to repetitive excitation. Power spectrum-weighted averaged group delay using shifted copies of the weighted group delay separated by a half fundamental frequency is proven to have the desired property.

[1]  Logan Volkers,et al.  PHASE VOCODER , 2008 .

[2]  Boualem Boashash,et al.  Estimating and interpreting the instantaneous frequency of a signal. I. Fundamentals , 1992, Proc. IEEE.

[3]  Joerg F. Hipp,et al.  Time-Frequency Analysis , 2014, Encyclopedia of Computational Neuroscience.

[4]  Hideki Kawahara,et al.  Tandem-STRAIGHT: A temporally stable power spectral representation for periodic signals and applications to interference-free spectrum, F0, and aperiodicity estimation , 2008, 2008 IEEE International Conference on Acoustics, Speech and Signal Processing.

[5]  Bayya Yegnanarayana,et al.  Epoch Extraction From Speech Signals , 2008, IEEE Transactions on Audio, Speech, and Language Processing.

[6]  Khaled H. Hamed,et al.  Time-frequency analysis , 2003 .

[7]  Hideki Kawahara,et al.  An interference-free representation of instantaneous frequency of periodic signals and its application to F0 extraction , 2011, 2011 IEEE International Conference on Acoustics, Speech and Signal Processing (ICASSP).