Glottaltimeparams.m

From Aparat

Contents 1 GLOTTALTIMEPARAMS Time-based parameterisation of the glottal flow 1.1 Syntax 1.2 Parameters 1.3 Output 1.4 Examples

GLOTTALTIMEPARAMS Time-based parameterisation of the glottal flow

Returns a structure containing multiple time-based parameters of the glottal flow together with the time instants required for their calculation.

Syntax

• Q=GLOTTALTIMEPARAMS(G,F0)

Parameters

• G Glottal flow @signal object
• F0 Fundamental frequency of signal

Output

• Q a structure with the following fields
  • OQ1, OQ2 - the open quotients calculated from the so-called primary and secondary openings of the glottal flow, respectively. Please see Hannu Pulakka's master's thesis (http://www.acoustics.hut.fi/publications/files/theses/pulakka_mst.pdf) around pages 37-38 to see a description of the two openings. If unsure, use OQ1.
  • NAQ - The Normalized Amplitude Quotient, a comparably robust parameter closely related to the pressedness of speech. For more information, see:

      P. Alku, T. Bäckström, and E. Vilkman. Normalized Amplitude Quotient for
      Parameterization of the Glottal Flow. Journal of the Acoustical Society
      of America, 112(2):701-710, August 2002. 

      Bäckström, T., Alku, P., and Vilkman, E., "Time Domain Parameterisation 
      of the Closing Phase of Glottal Airflow Waveform from Voices over a Large 
      Intensity Range," IEEE Transactions on Speech and Audio Processing, vol. 
      10, no. 3, pp. 186-192, Mar. 2002. 

  • AQ - The Amplitude Quotient:

      P. Alku and E. Vilkman. Amplitude Domain Quotient for Characterization
      of the Glottal Volume Velocity Waveform Estimated by Inverse Filtering.
      Speech Communication, 18(2):131-138, 1996. 

  • ClQ - The Closing Quotient.
  • OQa - A variation of the Open Quotient derived from the LF model:

      Gobl, C. and Ní Chasaide, A., 2003. Amplitude-based source parameters
      for measuring voice quality Proceedings of the ISCA Tutorial and
      Research Workshop VOQUAL'03 on Voice Quality: Functions, Analysis and
      Synthesis, Geneva, pp. 151-156.

  • QOQ - The Quasi-Open Quotient. See e.g.:

      A.-M. Laukkanen, E. Vilkman, P. Alku, and H. Oksanen. Physical
      Variations Related to Stress and Emotional State: a Preliminary Study.
      Journal of Phonetics, 24(3):313-335, 1996. 

  • SQ1, SQ2 - Speed Quotients calculated from the primary and the secondary openings, respectively (see OQ1 & OQ2).
  • t_po - The time instant of the primary opening.
  • t_so - The time instant of the secondary opening.
  • t_c - The closing time instant.
  • t_max - The time instant of the maximum flow.
  • t_min - The time instant of the minimum flow.
  • t_dmin - The time instant of the minimum of the derivative.
  • t_dmax - The time instant of the maximum of the derivative.
  • t_qo - The quasi-opening time instant.
  • t_qc - The quasi-closing time instant.

Examples

s = openwav('filename.wav');
opts = struct('p', 32, 'arfunc', 'lpc', 'causal', true);
g = iaif(s, opts);
f0 = find_f0(g);
params = glottaltimeparams(g,f0);