From dd01445d2a0afeb8a80a59f1fc9012fc63586896 Mon Sep 17 00:00:00 2001
From: Brian West <brian@freeswitch.org>
Date: Thu, 10 Jul 2008 19:32:43 +0000
Subject: [PATCH] confidence scores are 0 best to 100 worst
git-svn-id: http://svn.freeswitch.org/svn/freeswitch/trunk@8989 d0543943-73ff-0310-b7d9-9358b9ac24b2
---
src/mod/asr_tts/mod_pocketsphinx/mod_pocketsphinx.c | 12 +++++++++---
1 file changed, 9 insertions(+), 3 deletions(-)
diff --git a/src/mod/asr_tts/mod_pocketsphinx/mod_pocketsphinx.c b/src/mod/asr_tts/mod_pocketsphinx/mod_pocketsphinx.c
index 726e97f322..897806642c 100644
--- a/src/mod/asr_tts/mod_pocketsphinx/mod_pocketsphinx.c
+++ b/src/mod/asr_tts/mod_pocketsphinx/mod_pocketsphinx.c
@@ -33,6 +33,7 @@
#include <switch.h>
#include <pocketsphinx.h>
#include <err.h>
+#include <logmath.h>
SWITCH_MODULE_LOAD_FUNCTION(mod_pocketsphinx_load);
SWITCH_MODULE_SHUTDOWN_FUNCTION(mod_pocketsphinx_shutdown);
@@ -354,7 +355,7 @@ static switch_status_t pocketsphinx_asr_get_results(switch_asr_handle_t *ah, cha
{
pocketsphinx_t *ps = (pocketsphinx_t *) ah->private_info;
switch_status_t status = SWITCH_STATUS_SUCCESS;
- int32_t score;
+ int32_t conf, lconf;
if (switch_test_flag(ps, PSFLAG_BARGE)) {
switch_clear_flag_locked(ps, PSFLAG_BARGE);
@@ -365,8 +366,13 @@ static switch_status_t pocketsphinx_asr_get_results(switch_asr_handle_t *ah, cha
switch_mutex_lock(ps->flag_mutex);
switch_clear_flag(ps, PSFLAG_HAS_TEXT);
- score = ps_get_prob(ps->ps, &ps->uttid);
- ps->confidence = score - score - score / 1000;
+ conf = ps_get_prob(ps->ps, &ps->uttid);
+ lconf = logmath_log_to_ln(ps_get_logmath(ps->ps), conf);
+ ps->confidence = lconf - lconf - lconf;
+ /* 0(confident) to 100(not confident) score */
+ if (ps->confidence > 100) {
+ ps->confidence = 100;
+ }
switch_log_printf(SWITCH_CHANNEL_LOG, SWITCH_LOG_DEBUG, "Recognized: %s, Score: %d\n", ps->hyp, ps->confidence);
switch_mutex_unlock(ps->flag_mutex);