PocketSphinx
5prealpha
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N-Gram based multi-pass search ("FBS") More...
#include <string.h>
#include <assert.h>
#include <sphinxbase/ckd_alloc.h>
#include <sphinxbase/listelem_alloc.h>
#include <sphinxbase/err.h>
#include "pocketsphinx_internal.h"
#include "ps_lattice_internal.h"
#include "ngram_search.h"
#include "ngram_search_fwdtree.h"
#include "ngram_search_fwdflat.h"
Go to the source code of this file.
Macros | |
#define | NGRAM_HISTORY_LONG_WORD 2000 /* 20s */ |
Functions | |
ps_search_t * | ngram_search_init (const char *name, ngram_model_t *lm, cmd_ln_t *config, acmod_t *acmod, dict_t *dict, dict2pid_t *d2p) |
Initialize the N-Gram search module. | |
void | ngram_search_free (ps_search_t *search) |
Finalize the N-Gram search module. | |
int | ngram_search_mark_bptable (ngram_search_t *ngs, int frame_idx) |
Record the current frame's index in the backpointer table. More... | |
void | ngram_search_save_bp (ngram_search_t *ngs, int frame_idx, int32 w, int32 score, int32 path, int32 rc) |
Enter a word in the backpointer table. | |
int | ngram_search_find_exit (ngram_search_t *ngs, int frame_idx, int32 *out_best_score) |
Find the best word exit for the current frame in the backpointer table. More... | |
char const * | ngram_search_bp_hyp (ngram_search_t *ngs, int bpidx) |
Backtrace from a given backpointer index to obtain a word hypothesis. More... | |
void | ngram_search_alloc_all_rc (ngram_search_t *ngs, int32 w) |
Allocate last phone channels for all possible right contexts for word w. | |
void | ngram_search_free_all_rc (ngram_search_t *ngs, int32 w) |
Allocate last phone channels for all possible right contexts for word w. | |
int32 | ngram_search_exit_score (ngram_search_t *ngs, bptbl_t *pbe, int rcphone) |
Get the exit score for a backpointer entry with a given right context. | |
void | ngram_compute_seg_score (ngram_search_t *ngs, bptbl_t *be, float32 lwf, int32 *out_ascr, int32 *out_lscr) |
void | dump_bptable (ngram_search_t *ngs) |
ps_lattice_t * | ngram_search_lattice (ps_search_t *search) |
Construct a word lattice from the current hypothesis. | |
void | ngram_search_set_lm (ngram_model_t *lm) |
Sets the global language model. More... | |
N-Gram based multi-pass search ("FBS")
Definition in file ngram_search.c.
char const* ngram_search_bp_hyp | ( | ngram_search_t * | ngs, |
int | bpidx | ||
) |
Backtrace from a given backpointer index to obtain a word hypothesis.
Definition at line 550 of file ngram_search.c.
References bptbl_s::bp, dict_real_word(), ps_search_s::hyp_str, and bptbl_s::wid.
int ngram_search_find_exit | ( | ngram_search_t * | ngs, |
int | frame_idx, | ||
int32 * | out_best_score | ||
) |
Find the best word exit for the current frame in the backpointer table.
Definition at line 506 of file ngram_search.c.
References BETTER_THAN, ngram_search_s::n_frame, bptbl_s::score, bptbl_s::wid, and WORST_SCORE.
int ngram_search_mark_bptable | ( | ngram_search_t * | ngs, |
int | frame_idx | ||
) |
Record the current frame's index in the backpointer table.
Definition at line 329 of file ngram_search.c.
References ngram_search_s::frm_wordlist, and ngram_search_s::n_frame_alloc.
Referenced by ngram_fwdflat_finish(), ngram_fwdflat_search(), ngram_fwdtree_finish(), and ngram_fwdtree_search().
void ngram_search_set_lm | ( | ngram_model_t * | lm | ) |
Sets the global language model.
Sets the language model to use if nothing was passed in configuration
Definition at line 1403 of file ngram_search.c.