FXCEP

NAME

fxcep - Fx estimation by cepstrum algorithm

SYNOPSIS

fxcep (-I) (-t threshold) (-i item) (-d) (-l lofreq) (-h hifreq) file

DESCRIPTION

fxcep is a speech fundamental frequency measuring algorithm based on the cepstrum. A 512 point FFT is performed on 40ms windows of the input speech to find the log spectrum, and then an FFT of that provides the cepstrum . Then the Noll rules are implemented to decide whether the input is V+ or V-, and if V+, a fundamental frequency value is determined.

Options and their meanings are:

-I Identify program and version number and exit.

-t threshold Threshold for cepstral peak indicating V+ or V-. Default set internally to 75 - value in arbitrary units

-i item Select input item.

-d Output autocorrelation function as DISPLAY item.

-l lofreq Set lowest Fx value used in search. Default 60Hz.

-h lofreq Set highest Fx value used in search. Default 500Hz;

INPUT ITEMS

1.xx Any speech item.

2.xx Any Lx item (optional).

OUTPUT ITEMS

4.yy Cepstrum Fx.

9 Cepstrum function display.

VERSION/AUTHOR

1.0 L.C.Whitaker

2.0 D.M.Howard

3.3 M.A.Huckvale

SEE ALSO

pp(SFS1), fxac(SFS1)
Wed Jul 17 22:31:34 2013