Speech Recognizer Mini-Course
From SpeechWiki
(Difference between revisions)
| Line 1: | Line 1: | ||
| - | == | + | ==Mini Course Video== |
| + | Part of the HTK Lecture video is currently available. | ||
| - | + | As of 4:21 p.m. 01/13/2006, part 1 of lecture 1 can be obtained at | |
| - | + | ||
| - | + | http://mickey.ifp.uiuc.edu/speech/HTK/ | |
| - | + | I will post the rest of the lecture videos during this weekend. | |
| - | + | Bowon | |
| - | |||
| - | |||
| - | |||
==Dynamic Stop Herest== | ==Dynamic Stop Herest== | ||
| Line 64: | Line 61: | ||
} | } | ||
</pre> | </pre> | ||
| - | + | [[User:Arthur|Arthur]] 21:45, 14 January 2006 (CST) | |
| - | + | 8081385342654808751883 | |
Revision as of 12:36, 18 June 2006
Mini Course Video
Part of the HTK Lecture video is currently available.
As of 4:21 p.m. 01/13/2006, part 1 of lecture 1 can be obtained at
http://mickey.ifp.uiuc.edu/speech/HTK/
I will post the rest of the lecture videos during this weekend.
Bowon
Dynamic Stop Herest
Here's a perl routine that runs HERest until likelihood improvement falls below some threshold:
example:
herest("HERest -T 1 -A -D -S $modelDir/timitPLP.scp -I $modelDir/timitCMUPLP.mlf -t 250.0 150.0 1000.0 $modelDir/CMUphonebet.txt","$modelDir/timitMonophonesHRest.hdf", "$modelDir/timitMonophonesHERest1.hdf", .01);
code:
#assumes $modelDir/tmp dir exists, assumes that $in and $out are files
#run until improvment is less than eps
#Arguments:
#1 The HERest command. It must not have the -H and the -M flags - those are added by herest().
#2 The name of the 'In' MMF-file -what normally goes after the -H flag
#3 The name of the final 'Out' MMF-file -what normally goes after the -M flag
#4 The improvement likelihood (not log-likelihood) threshold
sub herest{
(my $cmd, my $in, my $out, my $eps) = @_;
(my $lastAvgProb, my $nextAvgProb, my $itCounter) = (-1,-1,0);
#run it once
my @cmdList = split(/ /, $cmd);
my $hmmList = pop @cmdList;
push @cmdList, ("-H", $in, "-M ", "$modelDir/tmp", $hmmList, " | grep '^[^ ].*' | tee $modelDir/herest.log");
ecsystem(join(' ',@cmdList));
my $getProbCmd = "cat $modelDir/herest.log | grep Reestimation | " . 'sed \'s/.*frame = \(.*\)$/\1/\'';
$nextAvgProb = `$getProbCmd`;
$itCounter++;
#run it a few more times
$cmdList[-5]="$modelDir/tmp/*";
my $iterCmd = join(' ',@cmdList);
while ($nextAvgProb-$lastAvgProb > $eps){
$lastAvgProb = $nextAvgProb;
ecsystem($iterCmd);
$nextAvgProb = `$getProbCmd`;
$itCounter++;
}
print " herest iterated $itCounter times, eps = ".($nextAvgProb-$lastAvgProb)."\n";
ecsystem("mv -v $modelDir/tmp/* $out");
}
#error checking system call. dies if called program fails.
sub ecsystem{
system($_[0]);
confess( "\nprogram failed with $?") if $?;
return $?;
}
Arthur 21:45, 14 January 2006 (CST) 8081385342654808751883
