Self-trained model runs good in sphinxtrain-test but bad with Pockstsphinx and Sphinx4

[kyon]

Hi, I am newbee to cmu-sphinx.

I created the language model using: http://www.speech.cs.cmu.edu/tools/lmtool-new.html
And trained the acoustic mode followed: https://cmusphinx.github.io/wiki/tutorialam/
Using latest release from https://cmusphinx.github.io/wiki/download/

The training data is very simple. They are all in the format as "Please take the characters <digits> once again <digits>".
There are 2,000 wav files for training(5 hours in total) and 500 files for test, which cost me 2days to prepare.</digits></digits>

The training result is very good according to align file:

TOTAL Words: 8256 Correct: 7278 Errors: 1105
TOTAL Percent correct = 88.15% Error = 13.38% Accuracy = 86.62%
TOTAL Insertions: 127 Deletions: 281 Substitutions: 697

However, I got a very bad accuracy when running Pocketsphinx/Sphinx4 with my model.
For example, file_2001.wav and file_2002.wav can be recognized in db.align file as:

1 please take the characters one three eight seven two once again one three eight seven two  (apple-FILE_2001)
2 please take the characters one three eight seven two once again one three eight seven two  (apple-FILE_2001)
3 Words: 16 Correct: 16 Errors: 0 Percent correct = 100.00% Error = 0.00% Accuracy = 100.00%
4 Insertions: 0 Deletions: 0 Substitutions: 0
5 please take the characters one seven THREE nine one ONCE AGAIN one seven three nine ONE  (apple-FILE_2002)
6 please take the characters one seven NINE  nine one ***  ***   one seven three nine ***  (apple-FILE_2002)
7 Words: 16 Correct: 12 Errors: 4 Percent correct = 75.00% Error = 25.00% Accuracy = 75.00%

Rather than pocketsphinx:

file_2001.wav : NINE ZERO EIGHT NINE TWO NINE ONE
file_2002.wav : NINE

pocketsphinx pocommand is

pocketsphinx_continuous -infile wav/file_2002.wav -hmm model_parameters/kyon2_db.cd_cont_32 -dict etc/kyon2_db.dic -lm etc/kyon2_db.lm.DMP

Training db, including etc/model_parameters/result can be found : https://drive.google.com/open?id=0ByvxjxiH6xq3SEotczdNNVhacUU
And I've uploaded 10 wav file for test.

Do I miss something in training or using the model?

[kyon]

Running with pocketsphinx_batch can get a very good result

Command is :

pocketsphinx_batch  -adcin yes  -cepdir wav  -cepext .wav  -ctl test.fileids  -lm etc/kyon2_db.lm.DMP -dict etc/kyon2_db.dic -hmm model_parameters/kyon2_db.cd_cont_32 -hyp test

Result:

INFO: batch.c(761): apple/file_2001: 8.23 seconds speech, 0.11 seconds CPU, 0.11 seconds wall
INFO: batch.c(763): apple/file_2001: 0.01 xRT (CPU), 0.01 xRT (elapsed)
PLEASE TAKE THE CHARACTERS ONE THREE EIGHT SEVEN TWO ONCE AGAIN ONE THREE EIGHT SEVEN TWO (apple/file_2001 -11322)
apple/file_2001 done --------------------------------------

Any magic here?

[Nickolay V. Shmyrev]

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