HQANAL

NAME

HQanal - High quality formant analysis

SYNOPSIS

HQanal (-i item) (-o offset) (-t) (-c) (-r) (-6) file

DESCRIPTION

HQanal performs excitation-synchronous formant analysis of a speech waveform using LPC and root-solving following procedure specified by Melvyn Hunt. Input should be a 10kHz speech waveform (preferably generated from a 20kHz acquired waveform using down210) and a set of excitation markers. The output is a set of raw formant estimates, synchronous to the excitation markers in the voiced regions, and at 20ms intervals during unvoiced intervals. The LPC covariance method is used, and pre-emphasis is applied to the voiced regions only.

Options and their meanings are:

-I Identify program and version number.

-i item Select input item number.

-o offset Set offset in micro-seconds between tx markers and start point of analysis window. Negative is earlier, positive later, default is 0.

-t Write tx item of analysis windows used in analysis.

-c Write LPC coefficients used in analysis instead of formant estimates.

-r Write LPC analysis residual as lx waveform.

-6 Use 6-pole LPC analysis in voiceless regions.

INPUT ITEMS

1.xx 10kHz sampled speech waveform.

3.xx Excitation markers.

OUTPUT ITEMS

12 High Quality formant estimates.

14 Optional LPC coefficients.

2 Optional residual waveform.

VERSION/AUTHOR

1.2 - Mark Huckvale (from lpc and rootlpc by Lynn Whitaker)

SEE ALSO

"Generation of controlled speech stimuli by pitch-synchronous LPC analysis of natural utterances", M.J. Hunt & C.E. Harvenberg, 12th Intl. Congress on Acoustics, Toronto Canada, 1986.

BUGS

Good formant analysis relies on good data preparation as much as on a good program.
The formant item produced by HQanal is not compatible with fmconv, use HQsynth for re-synthesis.
Wed Jul 17 22:31:36 2013