acmod_s Struct Reference

Acoustic model structure. More...

#include <acmod.h>


Data Fields

cmd_ln_t * config
 Configuration.
logmath_t * lmath
 Log-math computation.
glist_t strings
 Temporary acoustic model filenames.
fe_t * fe
 Acoustic feature computation.
feat_t * fcb
 Dynamic feature computation.
bin_mdef_tmdef
 Model definition.
tmat_ttmat
 Transition matrices.
void * mgau
 either s2_semi_mgau_t or ms_mgau_t, will make this more type-safe in the future.
void(* mgau_free )(void *)
 Function to dealloate mgau.
frame_eval_t frame_eval
 Function to compute GMM scores.
int16 * senone_scores
 GMM scores for current frame.
bitvec_t * senone_active_vec
 Active GMMs in current frame.
int * senone_active
 Array of active GMMs.
int n_senone_active
 Number of active GMMs.
int log_zero
 Zero log-probability value.
mfcc_t ** mfc_buf
 Temporary buffer of acoustic features.
mfcc_t *** feat_buf
 Temporary buffer of dynamic features.
FILE * rawfh
 File for writing raw audio data.
FILE * mfcfh
 File for writing acoustic feature data.
uint8 state
 State of utterance processing.
uint8 compallsen
 Compute all senones?
uint8 grow_feat
 Whether to grow feat_buf.
uint8 reserved
int16 output_frame
 Index of next frame of dynamic features.
int16 n_mfc_alloc
 Number of frames allocated in mfc_buf.
int16 n_mfc_frame
 Number of frames active in mfc_buf.
int16 mfc_outidx
 Start of active frames in mfc_buf.
int16 n_feat_alloc
 Number of frames allocated in feat_buf.
int16 n_feat_frame
 Number of frames active in feat_buf.
int16 feat_outidx
 Start of active frames in feat_buf.


Detailed Description

Acoustic model structure.

This object encapsulates all stages of acoustic processing, from raw audio input to acoustic score output. The reason for grouping all of these modules together is that they all have to "agree" in their parameterizations, and the configuration of the acoustic and dynamic feature computation is completely dependent on the parameters used to build the original acoustic model (which should by now always be specified in a feat.params file).

Because there is not a one-to-one correspondence from blocks of input audio or frames of input features to frames of acoustic scores (due to dynamic feature calculation), results may not be immediately available after input, and the output results will not correspond to the last piece of data input.

Definition at line 102 of file acmod.h.


Field Documentation

cmd_ln_t* acmod_s::config

Configuration.

Definition at line 104 of file acmod.h.

Referenced by acmod_init().

feat_t* acmod_s::fcb

Dynamic feature computation.

Definition at line 110 of file acmod.h.

Referenced by acmod_free(), acmod_init(), acmod_process_cep(), acmod_process_feat(), and ps_get_feat().

fe_t* acmod_s::fe

Acoustic feature computation.

Definition at line 109 of file acmod.h.

Referenced by acmod_end_utt(), acmod_free(), acmod_init(), acmod_process_raw(), acmod_start_utt(), and ps_get_fe().

mfcc_t*** acmod_s::feat_buf

Temporary buffer of dynamic features.

Definition at line 130 of file acmod.h.

Referenced by acmod_free(), acmod_init(), acmod_process_cep(), acmod_process_feat(), and acmod_score().

Function to compute GMM scores.

Definition at line 121 of file acmod.h.

Referenced by acmod_score().

Whether to grow feat_buf.

Definition at line 137 of file acmod.h.

Referenced by acmod_process_cep(), acmod_process_feat(), and acmod_set_grow().

logmath_t* acmod_s::lmath

Log-math computation.

Definition at line 105 of file acmod.h.

Referenced by acmod_init(), ngram_search_init(), and ps_lattice_init_search().

Zero log-probability value.

Definition at line 126 of file acmod.h.

Referenced by acmod_init().

Model definition.

Definition at line 113 of file acmod.h.

Referenced by acmod_clear_active(), acmod_free(), acmod_init(), bin_mdef_read_text(), ngram_search_init(), and ps_reinit().

mfcc_t** acmod_s::mfc_buf

Temporary buffer of acoustic features.

Definition at line 129 of file acmod.h.

Referenced by acmod_end_utt(), acmod_free(), acmod_init(), and acmod_process_raw().

File for writing acoustic feature data.

Definition at line 132 of file acmod.h.

Referenced by acmod_end_utt(), acmod_free(), acmod_process_cep(), and acmod_set_mfcfh().

either s2_semi_mgau_t or ms_mgau_t, will make this more type-safe in the future.

Definition at line 115 of file acmod.h.

Referenced by acmod_free(), and acmod_score().

void(* acmod_s::mgau_free)(void *)

Function to dealloate mgau.

Referenced by acmod_free().

Number of active GMMs.

Definition at line 125 of file acmod.h.

Referenced by acmod_clear_active(), and acmod_score().

Index of next frame of dynamic features.

Definition at line 139 of file acmod.h.

Referenced by acmod_frame_idx(), acmod_rewind(), acmod_score(), acmod_start_utt(), ps_get_n_frames(), and ps_get_utt_time().

File for writing raw audio data.

Definition at line 131 of file acmod.h.

Referenced by acmod_end_utt(), acmod_free(), acmod_process_raw(), and acmod_set_rawfh().

Array of active GMMs.

Definition at line 124 of file acmod.h.

Referenced by acmod_free(), acmod_init(), and acmod_score().

Active GMMs in current frame.

Definition at line 123 of file acmod.h.

Referenced by acmod_clear_active(), acmod_free(), and acmod_init().

GMM scores for current frame.

Definition at line 122 of file acmod.h.

Referenced by acmod_free(), acmod_init(), and acmod_score().

State of utterance processing.

Definition at line 135 of file acmod.h.

Referenced by acmod_end_utt(), acmod_init(), acmod_process_cep(), and acmod_start_utt().

Temporary acoustic model filenames.

Definition at line 106 of file acmod.h.

Transition matrices.

Definition at line 114 of file acmod.h.

Referenced by acmod_free(), and ngram_search_init().


The documentation for this struct was generated from the following file:

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