changelog

Hidden Markov Toolkit (HTK) 3.2.1 HTK is a toolkit for use in research into automatic speech recogn

2005-02-24  Anna Langley <[e-mail]>

        * Files for autoconf installs added

2005-02-08  S.E. Tranter  <[e-mail]>

	* HCluster.c: Added support for diagonal and block diagonal
     covariance representation with BIC stopping criterion.
	  Block diagonal case is slightly different to previous local version
          BIC scoring info now requires trace level 1 to be output.
	
2004-08-04  Antti-Veikko Rosti  <[e-mail]>
 
	* HERest.c: ConvLogWt() and ConvExpWt() added after ConvDiagC()
	calls to convert the mixture weights into the log-scale prior to
	forward-backward recursions.
 
 	* HHEd.c: Function ReOrderFeaturesCommand() added to sort model
 	parameters according to a global feature element re-ordering with
 	RP command.

2004-08-02  Gunnar Evermann  <[e-mail]>

	* HVite.c (main): Check that number of tokens requested via -n
	switch doesn't exceed maximum.

2004-07-120  Khe Chai Sim  <[e-mail]>

        * HHEd.c: Support for generic tree name mapping. Current mapping
	makes use of the macRoot prefix specified with the TB command.

2004-07-14  Gunnar Evermann  <[e-mail]>

	* HMMIRest.c (main): Employ LLFs for faster loading of lattices.
	(main): Add LATFILEMASK to be able to discard parts of the
	segment name when loading the lattice file.

2004-07-14  Antti-Veikko Rosti  <[e-mail]>

	* HERest.c: New heap for accumulators called accStack created. This
	is used in AttachAccs() instead of gstack.

	* HMMIRest.c: Removed unused variables and added T_TIM trace
	flag. The heap globStack renamed to accStack.

2004-07-08  Mark Gales <[e-mail]>

	* HHEd.c (RegClassesCommand): Correctly treat base classes stored
	in directories specified via -M.

2004-07-02  B. Jia  <[e-mail]>

	* HMMIRest.c: Fix a bug of single pass retrain in discrimitive 
	trainng

2004-06-25  Gunnar Evermann  <[e-mail]>

	* *.c (traceHFB): Eliminate traceHFB variable and replace with
	function call.

2004-06-06  B. Jia  <[e-mail]>

	* HMMIRest.c: New config variable UPDATEMODE to allow dumping summed
	accumulates.

2004-04-26  K. Yu  <[e-mail]>

	* HMMIRest.c: Add support for MMI priors in MPE training (new
	config variables MMIPRIOR and MMITAUI).

2004-04-17  Gunnar Evermann  <[e-mail]>

	* HERest.c (main): Fix for UPDATEMODE to make non-parallel mode
	training work again.

2004-04-16  Gunnar Evermann  <[e-mail]>

	* HERest.c: New config variable UPDATEMODE to allow dumping summed
	accumulates (subsumes functionality of HAccSum).

2004-04-13  B. Jia  <[e-mail]>

	* HMMIRest.c: New options '-rp' and '-qp' to support
	subdirectories of denominator and numerator lattices respectively,
	so that all side directories will not crowd under one directory.

2004-04-02  Bin Jia <[e-mail]>

	* HCompV:  New option '-p' to support storing CMN/CVN files in
	subdirectories for use with CMEANPATHMASK and VARSCALEPATHMASK.

2004-03-21  Mark Gales <[e-mail]>

	* *.c: Various fixed for use of new adaptation.

2004-02-16  Bin Jia <[e-mail]>

	* HDMan.c: MAXDICTS increased from 20 to 100
	
2003-12-17  Gunnar Evermann  <[e-mail]>

	* HVite.c (DoAlignment): Allow alignment of segments with empty
	transcriptions if an utterance boundary word (option -b) was
	specified.


2003-12-10  S.E. Tranter  <[e-mail]>

	* HCluster.c: Added -y option to force splits to be binary
            This changed the functions:
		 MakeInitialAssignment, MakeInitialModuloAssignment

	    Added a -z option to allow a BIC-based stopping criterion.
	    This is currently only implemented for a 2-way split and
	    for a full covariance (or correlation) matrix representation -
	    i.e. it does not yet include block-diagonal or diagonal covariance
	
	    Two implementations of the BIC-based criterion are implemented -
	    the choice of which is made on the sign of the -z parameter.
	    Negative means a "local" decision - in that the penalty factor
	    uses N_z, the number of frames in the cluster being split, 
	    whereas positive means a "global" decision - i.e the penalty
	    factor uses the total number of frames input to the clusterer.
	    The absolute value of the z parameter indicates the value of alpha
	    in the penalty formula.
	    This uses the new functions: 
		BICScore, ConvertCorrelationToCovariance, CalcJointMean,
		CalcJointCov

	Some maths functions from ~mjfg/cuhtk/HTKLib/HMath.c have also
	    been included. This is because the existing SVD implementation
	    sometimes goes into an infinite loop, so the alternative code
	    (which contains nr stuff so cant be released) has been included.
	    However, this is not yet called anywhere, since the icc version
	    (e.g. compiled on spot) doesn't seem to produced this problem.
            This involves the functions:
		PYTHAG, MAXX, SIGN, SVDCmp, InvSVD_cuhtk
	
2003-10-14  Anna Langley <[e-mail]>

	* htk_htktools_nt.mkf: Use backslashes in pathnames.

2003-10-14  Gunnar Evermann  <[e-mail]>

	* HLEd.c: Rename DELETE as Visual C++ doen't seem to like it.

2003-09-10  Gunnar Evermann  <[e-mail]>

	* HHEd.c (ParseAlpha): Fix parsing of octal charcter codes.
	From Tanel Alum鋏 <[e-mail]>

2003-07-28  Anna Langley <[e-mail]>
	* htk_htktools_nt.mkf: was not building HLRescore, applied changes
	supplied by Arlindo Veiga which corrects this.
	
2003-07-24  M. J. F. Gales  <[e-mail]>
 
 	* HERest.c: clarify the single pass retraining when 
 	the TARGETKIND does not change.
 
2003-07-08  Anna Langley <[e-mail]>
	* HERest.c, HHEd.c, HVite.c, HMMIRest.c, HEAdaptLat.c: removed
	unused variables from sources.
	
2003-06-18  M. J. F. Gales  <[e-mail]>

       * HERest.c (MLUpdateModels): maxM uninitialised. This means
       that the weights are not always guaranteed to be updated
       when there are multiple components.

2003-04-05  S.E. Tranter  <sej28@tigger>

	* HCluster.c (main): 
	    The Minimum number of frames required to attempt to do
	        full covariance matrix inversion is set to at least
	        the dimension of the feature vector + 1

	    New functions: 
	       InvertTriMatSVD to invert a TriMat covariance
	          matrix using SVD decomposition (more stable than CovInvert)
	       IsCovInvertableSVD : checks if SVD inversion has been
	          relatively stable
	       StoreCovsSVD : reordering of StoreCovs and inversion of
	          matrix using InvertTriMatSVD, so the inversion is 
	          now done before checking if the matrix is invertable

	    Modified functions:
	       StoreCovsSVD now called instead of StoreCovs in main loop
	       MakeClusterStats now calls InvertTriMatSVD not CovInvert
	                   
2003-03-30  Gunnar Evermann  <[e-mail]>

	* HLRescore.c (ProcessLattice): Try to make lattice node order
	deterministic by setting ln->score to node posterior before
	saving (can be turned off by setting SORTLATTICE=F).

2003-03-17  Sue Tranter  <sej28@ceres>

	* HCluster.c (SetConfParms): Bug fix to allow feature vectors
	     of other than 13 dimension. 

	SetConfParams now adds the "base_dimen" if it sees _D and _A, 
	    rather than adding 13.
	    Also, it checks that the minvar is not set to a different
	    value in the cfgfile and command line
        ReportUsage changes to allow "-w" option to set base_dimen on 
	    command line (_D and _A should be set in cfg file)
	Main : moved SetConfParms and setting dimension to after dealing 
	       with input args. (to allow -w)
	       -w option added to set base dimension on commandline
	ShowParameters: ordering changed to be alphabetical 
	                and -v and -w options added
 	

2003-03-20  Dan Povey <[e-mail]

	* HMMIRest.c: Bug fix for transition update.

2003-03-13  Gunnar Evermann  <[e-mail]>

	* HVite.c (ProcessFile): Output current beam if alignment failed
	and is restartable.

2003-03-12  Gunnar Evermann  <[e-mail]>

	* HERest.c (main): Undo change to total logprob calculation.

2003-03-12  Lan Wang <[e-mail]>

	* HMMIRest.c (SetConfParms): New config variables INXFORMMASK and
	PAXFORMMASK. 

2003-03-10  Gunnar Evermann  <[e-mail]>

	* HERest.c: Remove FIXUP again.

2003-03-10  Dan Povey  <[e-mail]>

	* HMMIRest.c: new config vars: VARFLOORPERCENTILE and VARSMOOTH
	* HERest.c: new config vars: VARFLOORPERCENTILE and FIXUP

2003-02-27  S.E. Tranter  <[e-mail]>

	* Makefile: Added HCluster to makefile

	* HCluster.c (main): 
	printing of numargs removed
	printing of dimension information needs T_TOP
        CloseAndExit function added to enable program to exit safely at 
	    different stages
	Bugfix for the case where all the segs are too small for main
	    clustering decisions (assigns them all to 1 cluster)
	Code which allowed an HPARM2 parameter (_Z) to be set has been
	    commented out, since it caused a seg fault and may have
	    been an interaction problem with a new HParm.c, since this
	    didn't happen previously. This option was not currently
	    being used in the config file anyway.

2003-02-25  Mark Gales <[e-mail]>

	* HHEd.c: Bug fixes in regression tree clustering.
	From Jos