Dictation Application using Sphinx4

Question

My requirements are similar to this question since the question is now 3 years old I am re-posting the question with information specific to mine, I want to create an application which takes a .wav (or any other standard audio file format) and converts it to text.

For Speech Recognition I have decided to use sphinx4, I am trying to enhance the Transcriber demo provided with sphinx. Its good but That only works for a specific Grammar (written in .gram and .gxml files).

EDIT To be able to use it with English ? I am trying to configure it with VoxForge_en_0.4. My config.XML file looks like:-

<?xml version="1.0" encoding="UTF-8"?>

<!--
   Sphinx-4 Configuration file
-->

<!-- ******************************************************** -->
<!--  biship  configuration file                              -->
<!-- ******************************************************** -->

<config>        

    <!-- ******************************************************** -->
    <!-- frequently tuned properties                              -->
    <!-- ******************************************************** --> 
    <property name="absoluteBeamWidth"  value="500"/>
    <property name="relativeBeamWidth"  value="1E-80"/>
    <property name="absoluteWordBeamWidth" value="20"/>
    <property name="relativeWordBeamWidth" value="1E-60"/>
    <property name="wordInsertionProbability" value="1E-16"/>
    <property name="languageWeight" value="7.0"/>
    <property name="silenceInsertionProbability" value=".1"/>
    <property name="frontend" value="epFrontEnd"/>
    <property name="recognizer" value="recognizer"/>
    <property name="showCreations" value="false"/>


    <!-- ******************************************************** -->
    <!-- word recognizer configuration                            -->
    <!-- ******************************************************** --> 

    <component name="recognizer" 
                          type="edu.cmu.sphinx.recognizer.Recognizer">
        <property name="decoder" value="decoder"/>
        <propertylist name="monitors">
            <item>accuracyTracker </item>
            <item>speedTracker </item>
            <item>memoryTracker </item>
            <item>recognizerMonitor </item>
        </propertylist>
    </component>

    <!-- ******************************************************** -->
    <!-- The Decoder   configuration                              -->
    <!-- ******************************************************** --> 

    <component name="decoder" type="edu.cmu.sphinx.decoder.Decoder">
        <property name="searchManager" value="wordPruningSearchManager"/>
        <property name="featureBlockSize" value="50"/>
    </component>

    <!-- ******************************************************** -->
    <!-- The Search Manager                                       -->
    <!-- ******************************************************** --> 

    <component name="wordPruningSearchManager" 
    type="edu.cmu.sphinx.decoder.search.WordPruningBreadthFirstSearchManager">
        <property name="logMath" value="logMath"/>
        <property name="linguist" value="lexTreeLinguist"/>
        <property name="pruner" value="trivialPruner"/>
        <property name="scorer" value="threadedScorer"/>
        <property name="activeListManager" value="activeListManager"/>
        <property name="growSkipInterval" value="0"/>
        <property name="checkStateOrder" value="false"/>
        <property name="buildWordLattice" value="true"/>
        <property name="acousticLookaheadFrames" value="1.7"/>
        <property name="relativeBeamWidth" value="${relativeBeamWidth}"/>
    </component>


    <!-- ******************************************************** -->
    <!-- The Active Lists                                         -->
    <!-- ******************************************************** --> 

    <component name="activeListManager" 
             type="edu.cmu.sphinx.decoder.search.SimpleActiveListManager">
        <propertylist name="activeListFactories">
            <item>standardActiveListFactory</item>
            <item>wordActiveListFactory</item>
            <item>wordActiveListFactory</item>
            <item>standardActiveListFactory</item>
            <item>standardActiveListFactory</item>
            <item>standardActiveListFactory</item>
        </propertylist>
    </component>

    <component name="standardActiveListFactory" 
             type="edu.cmu.sphinx.decoder.search.PartitionActiveListFactory">
        <property name="logMath" value="logMath"/>
        <property name="absoluteBeamWidth" value="${absoluteBeamWidth}"/>
        <property name="relativeBeamWidth" value="${relativeBeamWidth}"/>
    </component>

    <component name="wordActiveListFactory" 
             type="edu.cmu.sphinx.decoder.search.PartitionActiveListFactory">
        <property name="logMath" value="logMath"/>
        <property name="absoluteBeamWidth" value="${absoluteWordBeamWidth}"/>
        <property name="relativeBeamWidth" value="${relativeWordBeamWidth}"/>
    </component>

    <!-- ******************************************************** -->
    <!-- The Pruner                                               -->
    <!-- ******************************************************** --> 
    <component name="trivialPruner" 
                type="edu.cmu.sphinx.decoder.pruner.SimplePruner"/>

    <!-- ******************************************************** -->
    <!-- TheScorer                                                -->
    <!-- ******************************************************** --> 
    <component name="threadedScorer" 
                type="edu.cmu.sphinx.decoder.scorer.ThreadedAcousticScorer">
        <property name="frontend" value="${frontend}"/>
    </component>

    <!-- ******************************************************** -->
    <!-- The linguist  configuration                              -->
    <!-- ******************************************************** -->

    <component name="lexTreeLinguist" 
                type="edu.cmu.sphinx.linguist.lextree.LexTreeLinguist">
        <property name="logMath" value="logMath"/>
        <property name="acousticModel" value="wsj"/>
        <property name="languageModel" value="trigramModel"/>
        <property name="dictionary" value="dictionary"/>
        <property name="addFillerWords" value="false"/>
        <property name="fillerInsertionProbability" value="1E-10"/>
        <property name="generateUnitStates" value="false"/>
        <property name="wantUnigramSmear" value="true"/>
        <property name="unigramSmearWeight" value="1"/>
        <property name="wordInsertionProbability" 
                value="${wordInsertionProbability}"/>
        <property name="silenceInsertionProbability" 
                value="${silenceInsertionProbability}"/>
        <property name="languageWeight" value="${languageWeight}"/>
        <property name="unitManager" value="unitManager"/>
    </component>    


    <!-- ******************************************************** -->
    <!-- The Dictionary configuration                            -->
    <!-- ******************************************************** -->
    <component name="dictionary" 
        type="edu.cmu.sphinx.linguist.dictionary.FastDictionary">
        <property name="dictionaryPath"
                  value="file:src/voxforge-en-0.4/etc/cmudict.0.7a"/>
        <property name="fillerPath" 
              value="file:src/voxforge-en-0.4/model_parameters/voxforge_en_sphinx.cd_cont_5000/noisedict"/>
        <property name="addSilEndingPronunciation" value="false"/>
        <property name="wordReplacement" value="&lt;sil&gt;"/>
        <property name="unitManager" value="unitManager"/>
    </component>


    <!-- ******************************************************** -->
    <!-- The Language Model configuration                         -->
    <!-- ******************************************************** -->
    <component name="trigramModel" 
          type="edu.cmu.sphinx.linguist.language.ngram.large.LargeTrigramModel">
        <property name="unigramWeight" value=".5"/>
        <property name="maxDepth" value="3"/>
        <property name="logMath" value="logMath"/>
        <property name="dictionary" value="dictionary"/>
        <property name="location" value="file:src/voxforge-en-0.4/wsj5k.DMP"/>
<!--      <property name="location"   value="file:src/voxforge-Language/language_model.arpaformat.DMP"/>-->
    </component>


    <!-- ******************************************************** -->
    <!-- The acoustic model configuration                         -->
    <!-- ******************************************************** -->
    <component name="wsj"
               type="edu.cmu.sphinx.linguist.acoustic.tiedstate.TiedStateAcousticModel">
        <property name="loader" value="wsjLoader"/>
        <property name="unitManager" value="unitManager"/>
    </component>

    <component name="wsjLoader" type="edu.cmu.sphinx.linguist.acoustic.tiedstate.Sphinx3Loader">
        <property name="logMath" value="logMath"/>
        <property name="unitManager" value="unitManager"/>
<!--        <property name="location" value="file:src/hub4opensrc.cd_continuous_8gau"/>-->
        <property name="location" value="file:src/voxforge-en-0.4/model_parameters/voxforge_en_sphinx.cd_cont_5000" />
        <property name="dataLocation" value=""/>
    </component>

    <!-- ******************************************************** -->
    <!-- The unit manager configuration                           -->
    <!-- ******************************************************** -->

    <component name="unitManager" 
        type="edu.cmu.sphinx.linguist.acoustic.UnitManager"/>


    <!-- ******************************************************** -->
    <!-- The frontend configuration                               -->
    <!-- ******************************************************** -->

    <component name="epFrontEnd" type="edu.cmu.sphinx.frontend.FrontEnd">
        <propertylist name="pipeline">
            <item>audioFileDataSource </item>
            <item>dataBlocker </item>
            <item>speechClassifier </item>
            <item>speechMarker </item>
            <item>nonSpeechDataFilter </item>
            <item>preemphasizer </item>
            <item>windower </item>
            <item>fft </item>
            <item>melFilterBank </item>
            <item>dct </item>
            <item>liveCMN </item>
            <item>featureExtraction </item>
        </propertylist>
    </component>

    <component name="audioFileDataSource" type="edu.cmu.sphinx.frontend.util.AudioFileDataSource"/>


    <component name="microphone" 
                type="edu.cmu.sphinx.frontend.util.Microphone">
        <property name="closeBetweenUtterances" value="false"/>
    </component>

    <component name="dataBlocker" type="edu.cmu.sphinx.frontend.DataBlocker"/>

    <component name="speechClassifier"
                type="edu.cmu.sphinx.frontend.endpoint.SpeechClassifier">
        <property name="threshold" value="13"/>
    </component>

    <component name="nonSpeechDataFilter" 
                type="edu.cmu.sphinx.frontend.endpoint.NonSpeechDataFilter"/>

    <component name="speechMarker" 
                type="edu.cmu.sphinx.frontend.endpoint.SpeechMarker">
        <property name="speechTrailer" value="50"/>
    </component>

    <component name="preemphasizer"
        type="edu.cmu.sphinx.frontend.filter.Preemphasizer"/>

    <component name="windower" 
    type="edu.cmu.sphinx.frontend.window.RaisedCosineWindower"/>

    <component name="fft" 
        type="edu.cmu.sphinx.frontend.transform.DiscreteFourierTransform"/>

    <component name="melFilterBank" 
        type="edu.cmu.sphinx.frontend.frequencywarp.MelFrequencyFilterBank"/>

    <component name="dct" 
            type="edu.cmu.sphinx.frontend.transform.DiscreteCosineTransform"/>

    <component name="liveCMN" 
                type="edu.cmu.sphinx.frontend.feature.LiveCMN"/>

    <component name="featureExtraction" 
        type="edu.cmu.sphinx.frontend.feature.DeltasFeatureExtractor"/>

    <!-- ******************************************************* -->
    <!--  monitors                                               -->
    <!-- ******************************************************* -->

    <component name="accuracyTracker" 
                type="edu.cmu.sphinx.instrumentation.BestPathAccuracyTracker">
        <property name="recognizer" value="${recognizer}"/>
        <property name="showRawResults" value="false"/>
        <property name="showAlignedResults" value="false"/>
    </component>

    <component name="memoryTracker" 
                type="edu.cmu.sphinx.instrumentation.MemoryTracker">
        <property name="recognizer" value="${recognizer}"/>
        <property name="showDetails" value="false"/>
        <property name="showSummary" value="false"/>
    </component>

    <component name="speedTracker" 
                type="edu.cmu.sphinx.instrumentation.SpeedTracker">
        <property name="recognizer" value="${recognizer}"/>
        <property name="frontend" value="${frontend}"/>
        <property name="showDetails" value="false"/>
    </component>

    <component name="recognizerMonitor" 
                type="edu.cmu.sphinx.instrumentation.RecognizerMonitor">
        <property name="recognizer" value="${recognizer}"/>
        <propertylist name="allocatedMonitors">
            <item>configMonitor </item>
        </propertylist>
    </component>

    <component name="configMonitor" 
                type="edu.cmu.sphinx.instrumentation.ConfigMonitor">
        <property name="showConfig" value="false"/>
    </component>


    <!-- ******************************************************* -->
    <!--  Miscellaneous components                               -->
    <!-- ******************************************************* -->

    <component name="logMath" type="edu.cmu.sphinx.util.LogMath">
        <property name="logBase" value="1.0001"/>
        <property name="useAddTable" value="true"/>
    </component>
</config>

Is their anything wrong with my configuration ? Plz help....

What u cant understand ....? the intent is clear from the line "I want to create an application which takes a .wav (or any other standard audio file format) and converts it to text." than in the rest of the question I have explained what I have done for this and what errors I am facing ? — Amit, Jan 12 '12 at 14:28
"I want to create an application which takes a .wav (or any other standard audio file format) and converts it to text" is a statement, it's not a question. You also misleading on using Voxforge model which you shouldn't use. You also never describe exactly what problem do you have. — Nikolay Shmyrev, Jan 12 '12 at 17:43
than what I can use ? I configured Sphinx4 with VoxForge but the accuracy is much below the acceptance level... help!! — Amit, Jan 17 '12 at 10:55
If you have accuracy problems you might want to read the FAQ entry http://cmusphinx.sourceforge.net/wiki/faq#qwhy_my_accuracy_is_poor — Nikolay Shmyrev, Jan 17 '12 at 18:08
See also my comment here http://stackoverflow.com/questions/7411563/speech-recognition-response-is-poor-in-sphinx4 — Nikolay Shmyrev, Jan 17 '12 at 19:40

Nikolay Shmyrev · Accepted Answer · 2012-01-12T11:28:41.230

2

For Speech Recognition I have decided to use sphinx4, I am trying to run the demo Transcriber.jar provided with sphinx. That doesn't work when I give some other file as input.

If you describe your issues better you could get more definite help on this problem

How do I proceed ?

Read the tutorial

http://cmusphinx.sourceforge.net/wiki/tutorial

Where do I get the language model for US English that can be used with Sphinx4 ?

You can download them from CMUSphinx website and from other places. You can also build them yourself. One of the possible locations are

http://www.keithv.com/software/csr/

Any blog / tutorial will be helpful,

See above

However the files used in this tutorial are of differrent extensions, I am stuck in this phase I cant decide which path should be given in configuration. Plz Help,

See the example config in sphinx4/tests/performance/voxforge_en/voxforge.config.xml. It has all required paths

edited Jan 12 '12 at 11:28

answered Jan 04 '12 at 22:51

Nikolay Shmyrev

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thanks.... The demo gives ClassCastException when I give some other .wav file as input... – Amit Jan 05 '12 at 04:44
Provide full exception text. Provide information about the version you are using. Provide more information about modifications you've made. Then for sure your problem will be very easy to resolve. – Nikolay Shmyrev Jan 05 '12 at 15:27
I think the bit rate used by sample application and of my .way file is different, so I am trying changing that will post the result. I am using sphinx4-1.0beta6. – Amit Jan 06 '12 at 04:56
the prgram now works for all the .wav files of 16Khz, but the language grammar is very limited... I am trying to configure it with VoxForge Models but that is not working... plz see the edited question!! – Amit Jan 12 '12 at 13:23

Dictation Application using Sphinx4

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