ps_alignment_t Struct Reference

Multi-level alignment (words, phones, states) over an utterance. More...

#include <pocketsphinx/alignment.h>

Public Member Functions
POCKETSPHINX_EXPORT ps_alignment_t *	ps_alignment_retain (ps_alignment_t *al)
POCKETSPHINX_EXPORT int	ps_alignment_free (ps_alignment_t *al)
POCKETSPHINX_EXPORT ps_alignment_iter_t *	ps_alignment_words (ps_alignment_t *al)
POCKETSPHINX_EXPORT ps_alignment_iter_t *	ps_alignment_phones (ps_alignment_t *al)
POCKETSPHINX_EXPORT ps_alignment_iter_t *	ps_alignment_states (ps_alignment_t *al)

Related Symbols
(Note that these are not member symbols.)
#define	PS_ALIGNMENT_NONE   -1

Detailed Description

Multi-level alignment (words, phones, states) over an utterance.

Alignments are organized hierarchically: words contain phones, and phones contain HMM states. Use ps_alignment_words(), ps_alignment_phones(), or ps_alignment_states() to iterate at each level, and ps_alignment_iter_children() to descend into children.

Each entry has the following fields, accessible via ps_alignment_iter_seg() and ps_alignment_iter_name():

• name: Text (word string, phone symbol, or state ID as string)
• start: Start frame index
• duration: Duration in frames
• score: Acoustic score (log probability, higher is better)

To convert frames to seconds, divide by the frame rate (default 100, i.e. 10ms per frame).

Member Function Documentation

ps_alignment_retain()

POCKETSPHINX_EXPORT ps_alignment_t * ps_alignment_retain

(

ps_alignment_t *

al

)

Retain an alignment

ps_alignment_free()

POCKETSPHINX_EXPORT int ps_alignment_free

(

ps_alignment_t *

al

)

Release an alignment

ps_alignment_words()

POCKETSPHINX_EXPORT ps_alignment_iter_t * ps_alignment_words

(

ps_alignment_t *

al

)

Iterate over the alignment starting at the first word.

ps_alignment_phones()

POCKETSPHINX_EXPORT ps_alignment_iter_t * ps_alignment_phones

(

ps_alignment_t *

al

)

Iterate over the alignment starting at the first phone.

ps_alignment_states()

POCKETSPHINX_EXPORT ps_alignment_iter_t * ps_alignment_states

(

ps_alignment_t *

al

)

Iterate over the alignment starting at the first state.

Friends And Related Symbol Documentation

PS_ALIGNMENT_NONE

#define PS_ALIGNMENT_NONE   -1

related

Value indicating no parent or child for an entry.

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

• pocketsphinx/alignment.h