name: init_hmm
synopsis: init_hmm [options]

description:  

this utility is used to initialize models. it takes as input a list of feature
files and computes a global mean and variance across this data. each state
of the output models are initialized with these parameters. the models are 
assumed to be left-to-right models with self-loops but no skip states whose
model order is defined by the models file.

Note that the data in the input mfcc files can be either in ASCII or
binary format which is specified with the mode option, while the
output state file and transition file are always in ASCII format.  For
the HTK feature file, this utility strips the HTK header and read
features as floats. The ISIP prototype system has features as
doubles. This is a very limited HTK format support that we provide for
our system.

arguments:
   -input input_file     : input feature file list
   -state state_file     : output states file in ascii
   -trans transition_file: output transitions file in ascii	
   -models models_file   : file with each model to be created and the number of
                           states in that model
   -mode feature_format	 : ascii/binary	 
   -num_features	 : number of features - dimension of the state means
   -vfloor_file vfloor   : file to write the variance floor to	
   -var_floor floor      : variance floor value
   -delta		 : compute deltas on the fly
   -acc 		 : compute accelerations on the fly
   -delta_win 		 : window size to compute deltas and accelerations
   -htk 		 : HTK format feature files

options:
   -help                 : to view this message

examples:

1) For 39 dimensional feature files:
init_hmm -input mfcc.list -state state.text -trans transtion.text
		-models models.dat -mode binary -vfloor_file var_floor.text
		-var_floor 0.0002 -num_features 39

2) For 13 dimensional HTK format feature files with delta and acceleration 
   coefficients computation on the fly:

init_hmm -input mfcc.list -state state.text -trans transtion.text
		-models models.dat -mode binary -vfloor_file var_floor.text
		-var_floor 0.0002 -num_features 13 -delta -acc -delta_win 2
                -htk

man page: http://www.isip.msstate.edu/projects/speech/education/toolkits/asr/acoustic_models/training/init_hmm.html
