HTK HMM definition

Data structures for HTK HMM definition. More...

Data Structures
struct	HTK_HMM_StreamInfo
	Stream information (although current Julius supports only single stream). More...
struct	HTK_HMM_Options
	HMM Option More...
struct	_HTK_HMM_trans
	HMM transition table More...
struct	_HTK_HMM_variance
	HMM variance data More...
struct	_HTK_HMM_dens
	HMM Gaussian density (or mixture) data More...
struct	_HTK_HMM_stream_weight
	HMM stream weight definition More...
struct	_HTK_HMM_PDF
	HMM mixture PDF for a stream More...
struct	_HTK_HMM_state
	HMM state data More...
struct	_HTK_HMM_data
	Top HMM model, corresponds to "~h" macro in hmmdefs. More...
struct	GCODEBOOK
	Gaussian mixture codebook in tied-mixture model. More...
struct	BASEPHONE
	Basephone information extracted from hmminfo. More...
struct	HMM_basephone
	List of all basephone in hmminfo. More...
struct	HTK_HMM_INFO
	Top HMM structure that holds all the HTK HMM definition. More...
Defines
#define	MAX_STATE_NUM   2147483647
	Possible maximum value of state ID (in unsigned short).
#define	HMM_RC_DLIM   "+"
	Delimiter strings/characters to generate logical triphone names Right context delimiter in string.
#define	HMM_LC_DLIM   "-"
	Left context delimiter in string.
#define	HMM_RC_DLIM_C   '+'
	Right context delimiter in character.
#define	HMM_LC_DLIM_C   '-'
	Left context delimiter in character.
#define	SPMODEL_NAME_DEFAULT   "sp"
	Default logical name of short pause model.
#define	MAX_HMMNAME_LEN   256
	Length limit of HMM name (including ones generated in Julius).
Typedefs
typedef _HTK_HMM_trans	HTK_HMM_Trans
	HMM transition table
typedef _HTK_HMM_variance	HTK_HMM_Var
	HMM variance data
typedef _HTK_HMM_dens	HTK_HMM_Dens
	HMM Gaussian density (or mixture) data
typedef _HTK_HMM_stream_weight	HTK_HMM_StreamWeight
	HMM stream weight definition
typedef _HTK_HMM_PDF	HTK_HMM_PDF
	HMM mixture PDF for a stream
typedef _HTK_HMM_state	HTK_HMM_State
	HMM state data
typedef _HTK_HMM_data	HTK_HMM_Data
	Top HMM model, corresponds to "~h" macro in hmmdefs.
Enumerations
enum	iwcd_type { IWCD_UNDEF, IWCD_MAX, IWCD_AVG, IWCD_NBEST }
	Specify method of calculating approximated acoustic score at inter-word context pseudo phones on word edge. More...

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Detailed Description

Data structures for HTK HMM definition.

The data is defined in each levels from model, state to Gaussian components (mean and variance). Each level unit almost corresponds to the macro definition in the HTK definition language. Each data has links to data of lower level, and also has a linked list to the data in the same level.

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Typedef Documentation

typedef struct _HTK_HMM_PDF HTK_HMM_PDF

HMM mixture PDF for a stream

Note:

In a tied-mixture model, b points to a codebook defined as GCODEBOOK intead of the array of densities.

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Enumeration Type Documentation

enum iwcd_type

Specify method of calculating approximated acoustic score at inter-word context pseudo phones on word edge.

Enumerator:

IWCD_UNDEF	not specified explicitly
IWCD_MAX	Use maximum score among context variants.
IWCD_AVG	Use average score among context variants.
IWCD_NBEST	Use average of N-best scores among context variants.

Definition at line 86 of file htk_hmm.h.

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