Acoustic model path not set right CMU Sphinx

Question

The code written below is to convert audio to text using CMU Sphinx in Java 1.6 and Eclipse Helios.

import java.io.FileInputStream;
import java.io.IOException;
import java.io.FileNotFoundException;

import edu.cmu.sphinx.api.Configuration;
import edu.cmu.sphinx.api.SpeechResult;
import edu.cmu.sphinx.api.StreamSpeechRecognizer;

public class AudioToText {
    public static void main(String [] args) throws FileNotFoundException,IOException{
        Configuration configuration = new Configuration();

        // Set path to acoustic model.
        configuration.setAcousticModelPath("C:/Program Files/eclipse/sphinx4-5prealpha/models/acoustic");
        // Set path to dictionary.
        configuration.setDictionaryPath("C:/Program Files/eclipse/sphinx4-5prealpha/models/acoustic/wsj/dict/cmudict.0.6d");
        // Set language model.
        configuration.setLanguageModelPath("C:/Program Files/eclipse/sphinx4-5prealpha/models/language/en-us.lm.dmp");

        StreamSpeechRecognizer recognizer = new StreamSpeechRecognizer(configuration);
        //recognizer.startRecognition(new File("D:/audio.mp3").toURI().toURL());
        recognizer.startRecognition(new FileInputStream("D:/audio.mp3"));
        SpeechResult result;
        while ((result = recognizer.getResult()) != null) {
            System.out.println(result.getHypothesis());
        }
        recognizer.stopRecognition();
    }
}

Exceptions are arising because of not setting the path of acoustic model correctly as mentioned below:

   Exception in thread "main" Property exception component:'acousticModelLoader' property:'location' - Bad URL C:/Program Files/eclipse/sphinx4-5prealpha/models/acousticunknown protocol: c
edu.cmu.sphinx.util.props.InternalConfigurationException: Bad URL C:/Program Files/eclipse/sphinx4-5prealpha/models/acousticunknown protocol: c
    at edu.cmu.sphinx.util.props.ConfigurationManagerUtils.getResource(ConfigurationManagerUtils.java:479)
    at edu.cmu.sphinx.linguist.acoustic.tiedstate.Sphinx3Loader.newProperties(Sphinx3Loader.java:246)
    at edu.cmu.sphinx.util.props.PropertySheet.getOwner(PropertySheet.java:508)
    at edu.cmu.sphinx.util.props.PropertySheet.getComponent(PropertySheet.java:290)
    at edu.cmu.sphinx.linguist.acoustic.tiedstate.TiedStateAcousticModel.newProperties(TiedStateAcousticModel.java:102)
    at edu.cmu.sphinx.util.props.PropertySheet.getOwner(PropertySheet.java:508)
    at edu.cmu.sphinx.util.props.PropertySheet.getComponent(PropertySheet.java:290)
    at edu.cmu.sphinx.linguist.lextree.LexTreeLinguist.newProperties(LexTreeLinguist.java:301)
    at edu.cmu.sphinx.util.props.PropertySheet.getOwner(PropertySheet.java:508)
    at edu.cmu.sphinx.util.props.PropertySheet.getComponent(PropertySheet.java:290)
    at edu.cmu.sphinx.decoder.search.WordPruningBreadthFirstSearchManager.newProperties(WordPruningBreadthFirstSearchManager.java:199)
    at edu.cmu.sphinx.util.props.PropertySheet.getOwner(PropertySheet.java:508)
    at edu.cmu.sphinx.util.props.PropertySheet.getComponent(PropertySheet.java:290)
    at edu.cmu.sphinx.decoder.AbstractDecoder.newProperties(AbstractDecoder.java:71)
    at edu.cmu.sphinx.decoder.Decoder.newProperties(Decoder.java:37)
    at edu.cmu.sphinx.util.props.PropertySheet.getOwner(PropertySheet.java:508)
    at edu.cmu.sphinx.util.props.PropertySheet.getComponent(PropertySheet.java:290)
    at edu.cmu.sphinx.recognizer.Recognizer.newProperties(Recognizer.java:90)
    at edu.cmu.sphinx.util.props.PropertySheet.getOwner(PropertySheet.java:508)
    at edu.cmu.sphinx.util.props.ConfigurationManager.lookup(ConfigurationManager.java:161)
    at edu.cmu.sphinx.api.Context.<init>(Context.java:77)
    at edu.cmu.sphinx.api.Context.<init>(Context.java:49)
    at edu.cmu.sphinx.api.AbstractSpeechRecognizer.<init>(AbstractSpeechRecognizer.java:37)
    at edu.cmu.sphinx.api.StreamSpeechRecognizer.<init>(StreamSpeechRecognizer.java:33)
    at AudioToText.main(AudioToText.java:21)
Caused by: java.net.MalformedURLException: unknown protocol: c
    at java.net.URL.<init>(URL.java:574)
    at java.net.URL.<init>(URL.java:464)
    at java.net.URL.<init>(URL.java:413)
    at edu.cmu.sphinx.util.props.ConfigurationManagerUtils.resourceToURL(ConfigurationManagerUtils.java:495)
    at edu.cmu.sphinx.util.props.ConfigurationManagerUtils.getResource(ConfigurationManagerUtils.java:472)

I have specified path to acoustic folder. How to specify the correct path?

Answer 1

private static final String ACOUSTIC_MODEL_PATH = 
        TextAligner.class.getResource("/resources/models/acoustic/wsj").toString();
configuration = new Configuration();
configuration.setAcousticModelPath(ACOUSTIC_MODEL_PATH);

I guess you can do it like this if you have added acoustic model to a resources folder in your project folder.

Answer 2

Change configuration.setAcousticModelPath("C:/Program Files/eclipse/sphinx4-5prealpha/models/acoustic");

to

configuration.setAcousticModelPath("file:C:\Program Files\eclips\sphinx4-5prealpha\models\\acoustic");

It should work then.

Answer 3

private static String ACOUSTIC_MODEL = "file:///C:/zero/zero_ru.cd_cont_4000";
private static String LANGUAGE_MODEL = "file:///C:/zero/ru.lm";
private static String DICTIONARY     = "file:///C:/zero/ru.dic";