


FXCEP(1)                 USER COMMANDS                   FXCEP(1)



NAME
     fxcep - Fx estimation by cepstrum algorithm

SYNOPSIS
     fxcep (-I) (-t threshold) (-i item) 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.

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

     -iitem     Select input item.

INPUT ITEMS
     1.xx       Any speech item.

OUTPUT ITEMS
     4.yy       Cepstrum Fx.

VERSION/AUTHOR
     1.0        L.C.Whitaker

     2.0        D.M.Howard

     3.0        M.A.Huckvale

SEE ALSO
     pp(SFS1), fxac(SFS1)

SOURCE
     /ptemp/mark/sfs/ucl/fxcep.c












SFS                   Last change: UCL/GEC                      1



