1. First you need to create your Julian configuration file. Copy
this sample configuration file
(julian.jconf)
to you 'voxforge/auto' folder. For details on the parameters
contained in the julian.jconf file, see
the Julius manual. The main parameters are shown below:
2. Make sure your Microphone Volume is at a setting that is similar
to when you created your audio files.
3. Then run Julian with:
$cd voxforge/auto
$julian -input mic -C julian.jconf
4. The Julian will display its startup information on your screen. You can begin speaking when you see:
------------- System Info end -------------
************************************************************
* NOTICE: The first input may not be correctly recoginized *
* since no CMN
parameter is available on startup. *
************************************************************
The first 2-3 seconds of your speech will not be recognized as Julian
adjusts its recognition levels. You may need to adjust your volume to get better recognition results.
You should get fair recognition results. To improve recognition, your Acoustic Model needs
more audio training data. You need to create new prompts, and
record more speech audio files based on these prompts in order to
create better Acoustic Models. However, with an automated script, it is much
easier to record additional audio data.
To
add more speech audio to your Acoustic Model, keep the audio and
prompts you have already created, and follow the steps in this how-to:
add your new prompts to the prompts file you created in Step 2,
record new audio files corresponding to the your prompts as shown in Step 3, and
Update
your codetrain.scp file to include your new audio files,
and re-run the training script as shown in Step 4.
As you add more audio
data, you will begin to notice improvements in your recognition
accuracy, and it will reach a point where you no longer need to add
any additional training data.
The
steps in this how-to are for the creation of a single user Acoustic
Model. To create a multi-user Acoustic Models, simply get other
people to contribute audio as shown in the previous steps, and re-run
your script.
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