Javaのリアルタイムオーディオ周波数をカウントする

Question

マイクの音声入力から音声入力周波数をカウントする際に問題があります。誰もこれで私を助けることができますか？

私は私のマイクからの音声入力を取得し、その周波数をカウントするようになっています。

これは私がどのようにしたかを示すためのコードです。誰かが欠陥のある実装を識別できるかどうか。

package STLMA; 

/* 
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* and open the template in the editor. 
*/ 


/** 
* 
* @author CATE GABRIELLE 
*/ 

import java.io.*; 
import javax.sound.sampled.*; 

public class SpeechDetection { 
boolean stopCapture = false; 
ByteArrayOutputStream byteArrayOutputStream; 
TargetDataLine targetDataLine; // This is the object that acquires data from 
           // the microphone and delivers it to the program 

// the declaration of three instance variables used to create a SourceDataLine 
// object that feeds data to the speakers on playback 
AudioFormat audioFormat;  
AudioInputStream audioInputStream; 
SourceDataLine sourceDataLine;  

double voiceFreq = 0;  

FileOutputStream fout; 
AudioFileFormat.Type fileType; 
public static String closestSpeaker; 

public SpeechDetection(){ 
    captureAudio(); 
}  

private void captureAudio(){ 
    try{ 
     audioFormat = getAudioFormat(); 
     DataLine.Info dataLineInfo = new 
     DataLine.Info(TargetDataLine.class,audioFormat); 
     // object that describes the data line that we need to handle the acquisition 
     // of the audio data from the microphone. The first parameter makes the audio 
     // data readable 
     targetDataLine = (TargetDataLine)AudioSystem.getLine(dataLineInfo); 
     // object to handle data acquisition 
     targetDataLine.open(audioFormat);     
      //from the microphone that matches 
     targetDataLine.start();        
     // the information encapsulated in the DataLine.Info object 
     Thread captureThread = new Thread(new CaptureThread()); 
     captureThread.start(); 
    } catch (Exception e) { 
    System.out.println(e); 
    System.exit(0); 
    } 
}  

private AudioFormat getAudioFormat(){ 
    float sampleRate = 8000.0F; // The number of samples that will be acquired 
    //8000,11025,16000,22050,44100 each second for each channel of audio data. 
    int sampleSizeInBits = 16; //The number of bits that will be used to 
    //8,16      describe the value of each audio sample. 
    int channels = 1;   // Two channels for stereo, and one channel for mono. 
    //1,2 
    boolean signed = true;  // Whether the description of each audio sample 
    //true,false   
    //consists of both positive and negative values, or positive values only.   
    boolean bigEndian = false; 
    //true,false 
    return new AudioFormat(sampleRate,sampleSizeInBits,channels,signed,bigEndian);   
} 

//Inner class to capture data from microphone 
class CaptureThread extends Thread { 
    byte tempBuffer[] = new byte[8000]; 
    // byte buffer variable to contain the raw audio data 
    int countzero;      
    // counter variable to count the number of zero's    
    short convert[] = new short[tempBuffer.length]; 
    // short variable that is appropriate to 

    // collect the audio input for porcessing 

    //  public void start(){ 
    //   Thread voices = new Thread(this); 
    //   voices.start(); 
    //  } 

    @Override 
    public void run(){    
    // a continuous thread to process the continuous audio input 
     byteArrayOutputStream = new ByteArrayOutputStream(); // the object to write the 

    // raw audio input to the byte buffer variable 
     stopCapture = false; 
     try{ 
      while(!stopCapture){      
       int cnt = targetDataLine.read(tempBuffer,0,tempBuffer.length); 
      // reads the raw audio input 

      // and returns the number of bytes actually read 
       byteArrayOutputStream.write(tempBuffer, 0, cnt); 
      // writing the number of bytes read to the 
                   // container     
       try{ 
        countzero = 0; 

        for(int i=0; i < tempBuffer.length; i++){ 
       // the loop that stores the whole audio data           
         convert[i] = tempBuffer[i];  
       // to the convert variable which is a short data type, 
         if(convert[i] == 0){countzero++;}  
       // then counts the number of zero's 
        } 
        voiceFreq = (countzero/2)+1;    
       // calculates the number of frequency and 
            // stores to the voiceFreq variable 
        if(voiceFreq>=80 && voiceFreq<=350) 
         System.out.println("Voice"+voiceFreq); 
        else 
         System.out.println("Unvoice"+voiceFreq); 
       }catch(StringIndexOutOfBoundsException e) 
       {System.out.println(e.getMessage());}                      
        Thread.sleep(0);           
      } 
     byteArrayOutputStream.close(); 
     }catch (Exception e) { 
      System.out.println(e); 
      System.exit(0); 
     } 
    } 
}   

public static void main(String [] args){ 
    SpeechDetection voiceDetector1 = new SpeechDetection();   
    //  voiceDetector1.setSize(300,100); 
    //  voiceDetector1.setDefaultCloseOperation(EXIT_ON_CLOSE); 
    //  voiceDetector1.setVisible(true); 
} 



} 

ところで、「voiceFreq」は音声の周波数を表します。 ここでの目標は、入力が音声かノイズかを知ることです。 誰かが私の問題を助けてくれることを願っています。ありがとう、新年の幸せ。

Answer 1

私は何かが潜在的な声や雑音であるか否かを検出するために、1はデータのセクションにFFTを行い、周波数成分が「通常の声」の一部の範囲内であったかどうかを確認したいと思うだろう。

たぶん、いくつかのFFT情報のReliable and fast FFT in Javaを参照してください。