void sig2coef

In file ../include/sigpr/EST_sigpr_utt.h:

## void sig2coef | ## (EST_Wave &sig, EST_Track &a, EST_String type, float factor = 2.0, EST_WindowFunc* wf = EST_Window::creator(DEFAULT_WINDOW_NAME))

> Produce a single set of coefficents from a waveform.

## Documentation

> Produce a single set of coefficents from a waveform. The type of coefficient required is given in the argument <parameter>type</parameter>. Possible types are:

> <variablelist>

> <varlistentry><term>lpc</term><listitem>linear predictive coding</listitem></varlistentry>

> <varlistentry><term>cep</term><listitem>cepstrum coding from lpc coefficients</listitem></varlistentry>

> <varlistentry><term>melcep</term><listitem>Mel scale cepstrum coding via fbank</listitem></varlistentry>

> <varlistentry><term>fbank</term><listitem>Mel scale log filterbank analysis</listitem></varlistentry>

> <varlistentry><term>lsf</term><listitem>line spectral frequencies</listitem></varlistentry>

> <varlistentry><term>ref</term><listitem>Linear prediction reflection coefficients</listitem></varlistentry>

> <varlistentry><term>power</term><listitem></listitem></varlistentry>

> <varlistentry><term>f0</term><listitem>srpd algorithm</listitem></varlistentry>

> <varlistentry><term>energy</term><listitem>root mean square energy</listitem></varlistentry>

> </variablelist>

> The order of the analysis is calculated from the number of channels in <parameter>fv</parameter>. The positions of the analysis windows must be given by filling in the track's time array.

> This function windows the waveform at the intervals given by the track time array. The length of each window is <parameter>factor<parameter> the local time shift. The windowing function is giveb by <parameter>wf</parameter>.

Parameters:
  sig - : input waveform
  fv - : output coefficients. These have been pre-allocated and the number of channels in a indicates the order of the analysis.
  type - : the types of coefficients to be produced. "lpc", "cep" etc
  factor - : the frame length factor, i.e. the analysis frame length will be this times the local pitch period.
  wf - : function for windowing. See Windowing mechanisms

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This page is part of the Edinburgh Speech Tools Library documentation
Copyright University of Edinburgh 1997
Contact: speech_tools@cstr.ed.ac.uk