Recognition difference between pocketsphinx_continous infile and inmic

[Akshay Goyal]

Hi,

So I trained a model for command and control style decoding for the following sentences:

• What is your name
• Nice to meet you, Rekha
• My name is Ravi
• Same here
• No, I am not
• I am from Mumbai
• Where are you from?
• Which town?
• Is it close to Jaipur?
• I have to go now.
• Great talking to you

I am attaching the acoustic model, grammar and dictionary file for your reference.
The training data is approximately of 2-3 hours and I was trying to recognise a set of 1000 files post the training.

So when I tried to run the recognition on this particular set using this command

pocketsphinx_continuous -infile <filename.wav> -hmm /Users/akshaygoyal/Desktop/Culturealley/Sound_08_06_2016_level_1_test/acoustic-0.0 -jsgf conv1.gram -dict conv1.dic -samprate 8000 -logfn /dev/null -kws_threshold 1e-40f -remove_noise yes

it recognises 54% of the utterances as correct. So when I tried running the files which it didn’t recognise using -inmic mode

pocketsphinx_continuous -inmic yes -hmm /Users/akshaygoyal/Desktop/Culturealley/Sound_08_06_2016_level_1_test/acoustic-0.0 -jsgf conv1.gram -dict conv1.dic -samprate 8000 -logfn /dev/null -kws_threshold 1e-40f -remove_noise yes

it recognises it perfectly.

I am also attaching some of the problematic wav files which show this behaviour.

I am unable to understand what is the issue here. Any leads will be appreciated.

Thanks,
Akshay Goyal

Here is the link to the zip having all the files - https://s3.amazonaws.com/language-practice/English-App/Files.zip

[Nickolay V. Shmyrev]

Pocketsphinx continuous is not very good at recognizing short files with too high volume. It needs some time to adapt to the level. You need to set -cmninit value in feat.params to something like

  -cmninit 71

[Akshay Goyal]

Thanks,

This seems to work fine for me.

Out of curiousity what does this parameter do?

[Nickolay V. Shmyrev]

Out of curiousity what does this parameter do?

ask google to feed your curiosity