android - amélioration de la voix/annulation de bruit/bibliothèque de réduction de bruit pour android

Question

Je développe une application qui a une fonction de reconnaissance vocale en utilisant android construit dans SpeechRecognizer et RecognizerIntent. Y a-t-il une bibliothèque de réduction de bruit ou d'annulation de bruit pour Android qui peut s'intégrer à mon application pour améliorer la précision de la reconnaissance vocale? J'ai vu une classe NoiseSuppressor dans Android mais je ne sais pas comment l'intégrer dans SpeechRecognizer. Je suis novice dans le domaine de la programmation Android. Merci à l'avance

public class MainActivity extends AppCompatActivity implements RecognitionListener { 

private AudioRecord audioRecord; 
private TextView returnedText; 
private Button editButton; 
private Button clearButton; 
private ToggleButton toggleButton; 
private ProgressBar progressBar; 
private SpeechRecognizer speech ; 
private Intent recognizerIntent, editIntent; 
private String LOG_TAG = "MainActivity"; 

@Override 
protected void onCreate(Bundle savedInstanceState) { 
    super.onCreate(savedInstanceState); 
    setContentView(R.layout.activity_main); 

    //for noise suppressor checking 
    int N = AudioRecord.getMinBufferSize(48000,AudioFormat.CHANNEL_IN_MONO,AudioFormat.ENCODING_PCM_16BIT); 
    audioRecord = new AudioRecord(MediaRecorder.AudioSource.MIC, 8000, AudioFormat.CHANNEL_IN_MONO, AudioFormat.ENCODING_PCM_16BIT, N*10); 
    int sessionId = audioRecord.getAudioSessionId(); 
    NoiseSuppressor noiseSuppresor = NoiseSuppressor.create(sessionId); 

    if(noiseSuppresor == null){ 
     Toast.makeText(this, "No Suppersor", Toast.LENGTH_LONG).show(); 
    }else{ 
     Toast.makeText(this, "Have Suppersor", Toast.LENGTH_LONG).show(); 
    } 

    returnedText = (TextView) findViewById(R.id.textView1); 
    progressBar = (ProgressBar) findViewById(R.id.progressBar1); 
    toggleButton = (ToggleButton) findViewById(R.id.toggleButton1); 
    editButton = (Button)findViewById(R.id.button1); 
    clearButton = (Button)findViewById(R.id.button2); 

    progressBar.setVisibility(View.INVISIBLE); 

    toggleButton.setOnCheckedChangeListener(new CompoundButton.OnCheckedChangeListener() { 

     @Override 
     public void onCheckedChanged(CompoundButton buttonView, boolean isChecked) { 
      initSpeech(); 
      if (isChecked) { 
       progressBar.setVisibility(View.VISIBLE); 
       progressBar.setIndeterminate(true); 
       speech.startListening(recognizerIntent); 
      } else { 
       progressBar.setIndeterminate(false); 
       progressBar.setVisibility(View.INVISIBLE); 
       speech.stopListening(); 
      } 
     } 
    }); 

    clearButton.setOnClickListener(new View.OnClickListener() { 
     @Override 
     public void onClick(View v) { 
      returnedText.setText(""); 
     } 
    }); 

    editButton.setOnClickListener(new View.OnClickListener() { 
     @Override 
     public void onClick(View v) { 
      editIntent = new Intent(MainActivity.this, EditorActivity.class); 
      String forEditText = returnedText.getText().toString(); 
      editIntent.putExtra("forEdit", forEditText); 
      startActivity(editIntent); 
     } 
    }); 


} 

private void initSpeech(){ 

    speech = SpeechRecognizer.createSpeechRecognizer(this); 
    speech.setRecognitionListener(this); 
    recognizerIntent = new Intent(RecognizerIntent.ACTION_RECOGNIZE_SPEECH); 
    recognizerIntent.putExtra(RecognizerIntent.EXTRA_LANGUAGE_PREFERENCE,"en"); 
    recognizerIntent.putExtra(RecognizerIntent.EXTRA_CALLING_PACKAGE, this.getPackageName()); 
    recognizerIntent.putExtra(RecognizerIntent.EXTRA_LANGUAGE_MODEL, RecognizerIntent.LANGUAGE_MODEL_FREE_FORM); 
    recognizerIntent.putExtra(RecognizerIntent.EXTRA_PARTIAL_RESULTS, true); 
    recognizerIntent.putExtra(RecognizerIntent.EXTRA_PREFER_OFFLINE, true); 
    recognizerIntent.putExtra("android.speech.extra.DICTATION_MODE", true); 
    recognizerIntent.putExtra(RecognizerIntent.EXTRA_SPEECH_INPUT_POSSIBLY_COMPLETE_SILENCE_LENGTH_MILLIS, 5000); 
} 

@Override 
public void onResume() { 
    super.onResume(); 
} 

@Override 
protected void onPause() { 
    super.onPause(); 
    if (speech != null) { 
     speech.stopListening(); 
     speech.cancel(); 
     Log.i(LOG_TAG, "destroy"); 
    } 


} 

@Override 
public void onBeginningOfSpeech() { 
    Log.i(LOG_TAG, "onBeginningOfSpeech"); 
    progressBar.setIndeterminate(false); 
    progressBar.setMax(10); 
} 

@Override 
public void onBufferReceived(byte[] buffer) { 
    Log.i(LOG_TAG, "onBufferReceived: " + buffer); 
} 

@Override 
public void onEndOfSpeech() { 
    Log.i(LOG_TAG, "onEndOfSpeech"); 
    progressBar.setIndeterminate(true); 
    toggleButton.setChecked(false); 
    speech.destroy(); 
} 

@Override 
public void onError(int errorCode) { 
    String errorMessage = getErrorText(errorCode); 
    Log.d(LOG_TAG, "FAILED " + errorMessage); 
    returnedText.setText(errorMessage); 
    toggleButton.setChecked(false); 
    speech.destroy(); 
} 

@Override 
public void onEvent(int arg0, Bundle arg1) { 
    Log.i(LOG_TAG, "onEvent"); 
} 

@Override 
public void onPartialResults(Bundle partialResults) { 
    ArrayList<String> matches = partialResults 
      .getStringArrayList(SpeechRecognizer.RESULTS_RECOGNITION); 
    String text = ""; 
    for (String result : matches) 
     text += result + "\n"; 

    returnedText.setText(text); 
} 

@Override 
public void onReadyForSpeech(Bundle arg0) { 
    Log.i(LOG_TAG, "onReadyForSpeech"); 
} 

@Override 
public void onResults(Bundle results) { 
    Log.i(LOG_TAG, "onResults"); 
    ArrayList<String> matches = results 
      .getStringArrayList(SpeechRecognizer.RESULTS_RECOGNITION); 
    String text = ""; 
    for (String result : matches) 
     text += result + "\n"; 

    returnedText.append(text); 
    speech.destroy(); 
} 

@Override 
public void onRmsChanged(float rmsdB) { 
    Log.i(LOG_TAG, "onRmsChanged: " + rmsdB); 
    progressBar.setProgress((int) rmsdB); 
} 

public static String getErrorText(int errorCode) { 
    String message; 
    switch (errorCode) { 
     case SpeechRecognizer.ERROR_AUDIO: 
      message = "Audio recording error"; 
      break; 
     case SpeechRecognizer.ERROR_CLIENT: 
      message = "Client side error"; 
      break; 
     case SpeechRecognizer.ERROR_INSUFFICIENT_PERMISSIONS: 
      message = "Insufficient permissions"; 
      break; 
     case SpeechRecognizer.ERROR_NETWORK: 
      message = "Network error"; 
      break; 
     case SpeechRecognizer.ERROR_NETWORK_TIMEOUT: 
      message = "Network timeout"; 
      break; 
     case SpeechRecognizer.ERROR_NO_MATCH: 
      message = "No match"; 
      break; 
     case SpeechRecognizer.ERROR_RECOGNIZER_BUSY: 
      message = "RecognitionService busy"; 
      break; 
     case SpeechRecognizer.ERROR_SERVER: 
      message = "error from server"; 
      break; 
     case SpeechRecognizer.ERROR_SPEECH_TIMEOUT: 
      message = "No speech input"; 
      break; 
     default: 
      message = "Didn't understand, please try again."; 
      break; 
    } 
    return message; 
} 

}

Answer 1

il suffit d'ajouter "noise_suppression = sur" dans votre AudioManager cette façon:

yourAudioManager.setParameters("noise_suppression=on");