You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
74 lines
2.7 KiB
74 lines
2.7 KiB
#ifndef CTC_BEAM_SEARCH_DECODER_H_
|
|
#define CTC_BEAM_SEARCH_DECODER_H_
|
|
|
|
#include <vector>
|
|
#include <string>
|
|
#include <utility>
|
|
#include "scorer.h"
|
|
|
|
/* CTC Best Path Decoder
|
|
*
|
|
* Parameters:
|
|
* probs_seq: 2-D vector that each element is a vector of probabilities
|
|
* over vocabulary of one time step.
|
|
* vocabulary: A vector of vocabulary.
|
|
* Return:
|
|
* A vector that each element is a pair of score and decoding result,
|
|
* in desending order.
|
|
*/
|
|
std::string ctc_best_path_decoder(std::vector<std::vector<double> > probs_seq,
|
|
std::vector<std::string> vocabulary);
|
|
|
|
/* CTC Beam Search Decoder
|
|
|
|
* Parameters:
|
|
* probs_seq: 2-D vector that each element is a vector of probabilities
|
|
* over vocabulary of one time step.
|
|
* beam_size: The width of beam search.
|
|
* vocabulary: A vector of vocabulary.
|
|
* blank_id: ID of blank.
|
|
* cutoff_prob: Cutoff probability of pruning
|
|
* ext_scorer: External scorer to evaluate a prefix.
|
|
* Return:
|
|
* A vector that each element is a pair of score and decoding result,
|
|
* in desending order.
|
|
*/
|
|
std::vector<std::pair<double, std::string> >
|
|
ctc_beam_search_decoder(std::vector<std::vector<double> > probs_seq,
|
|
int beam_size,
|
|
std::vector<std::string> vocabulary,
|
|
int blank_id,
|
|
double cutoff_prob=1.0,
|
|
Scorer *ext_scorer=NULL
|
|
);
|
|
|
|
/* CTC Beam Search Decoder for batch data, the interface is consistent with the
|
|
* original decoder in Python version.
|
|
|
|
* Parameters:
|
|
* probs_seq: 3-D vector that each element is a 2-D vector that can be used
|
|
* by ctc_beam_search_decoder().
|
|
* .
|
|
* beam_size: The width of beam search.
|
|
* vocabulary: A vector of vocabulary.
|
|
* blank_id: ID of blank.
|
|
* num_processes: Number of threads for beam search.
|
|
* cutoff_prob: Cutoff probability of pruning
|
|
* ext_scorer: External scorer to evaluate a prefix.
|
|
* Return:
|
|
* A 2-D vector that each element is a vector of decoding result for one
|
|
* sample.
|
|
*/
|
|
std::vector<std::vector<std::pair<double, std::string>>>
|
|
ctc_beam_search_decoder_batch(std::vector<std::vector<std::vector<double>>> probs_split,
|
|
int beam_size,
|
|
std::vector<std::string> vocabulary,
|
|
int blank_id,
|
|
int num_processes,
|
|
double cutoff_prob=1.0,
|
|
Scorer *ext_scorer=NULL
|
|
);
|
|
|
|
|
|
#endif // CTC_BEAM_SEARCH_DECODER_H_
|