[hts-users:03596] HTS-demo pulsenoise

[Csapo Tamas Gabor <csapot@xxxxxxxxxxx>]

Hi All,

I have seen that in the HTS-2.2 Normal demo (pulse-noise excitation) 
some noise is added above 6 kHz in the voiced regions:

Training.pl, lines 1958 ... 1966
 # synthesize waveform
 $lfil = `$PERL $datdir/scripts/makefilter.pl $sr 0`;
 $hfil = `$PERL $datdir/scripts/makefilter.pl $sr 1`;

 $line = "$SOPR -m 0 $gendir/$base.pit | $EXCITE -p $fs | $DFS -b $hfil 
> $gendir/$base.unv";
 shell($line);

 $line = "$EXCITE -p $fs $gendir/$base.pit | ";
 $line .= "$DFS -b $lfil | $VOPR -a $gendir/$base.unv | ";
[...]

Is there any reason for adding noise to higher frequencies of the 
pulse-noise excitation? This part of Training.pl wasn't there in the 
HTS-2.1.1 version, and I haven't found any changelog or paper that would 
explain why this has been introduced.

Thanks and Best regards,
Tamas