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

EST_Track pitchmark

(EST_Wave &lx,   EST_Features &op)

Find pitchmarks in Larynograph (lx) signal.

Documentation

Find pitchmarks in Larynograph (lx) signal.

This high level function places a pitchmark on each positive peak in the voiced portions of the lx signal. Pitchmarks are stored in the time component of a EST_Track object and returned. The function works by high and low pass filtering the signal using forward and backward filtering to remove phase shift. The negative going points in the smoothed differentiated signal, corresponding to peaks in the original are then chosen.

Parameters:

lx - laryngograph waveform
op - options, mainly for filter control:

• lx_low_frequency low pass cut off for lx filtering : typical value 400
• lx_low_order order of low pass lx filter: typical value 19
• lx_high_frequency high pass cut off for lx filtering: typical value 40
• lx_high_order order of high pass lx filter: typical value 19
• median_order order of high pass lx filter: typical value 19

Alphabetic index HTML hierarchy of classes or Java

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