android-用於android的語音增強/噪音消除/降噪庫

Question

我正在開發一個應用程序，該應用程序使用內置於SpeechRecognizer和RecognizerIntent中的android語音識別功能。是否有任何降噪或噪聲消除庫的Android可以集成到我的應用程序，以提高語音識別的準確性？我在android中看到了NoiseSuppressor類，但我知道如何將它集成到SpeechRecognizer中。我是android編程領域的新手。在此先感謝

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

只需添加 「noise_suppression =的」 在AudioManager是這樣的：

yourAudioManager.setParameters("noise_suppression=on");