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JAVA做的语音识别 (via TranXcode)解决思路

日期：2014-05-20　 浏览次数：20580 次

JAVA做的语音识别 (via TranXcode)
我想用java实现一个 语音识别的软件。比如我说一句‘hello’，软件就会采集我说话的特征值，并记录下来，并输出相应值。当别人说‘hello’的时候，采集其特征值，并与我的比较，相同就通过，不同就继续输入。声音的采集主要通过麦克风实现。

------解决方案--------------------
声音识别是一个专门的技术，其实就是对声音波形的判断。如果你想用Java实现的话，那你必须先对Java的声音输入输出的操作有基本的了解。下面是一个简单的录音并输出的程序。录音的时候，每次读取数据是存放在buffer这个字节数组之中的，再把它输出。而你，是要识别的话，就是从这个数组中提取信息。那么这个数组的结构是什么样的呢。对这个程序而言，采用16位双声道录音，那么这个数组，每2位拼起来，是一个采样值，这个值即是声音的响度。将2个字节视为一个单位的话，由于是双声道，就是说，两个单位一组，一个是左声道，一个是右声道，交替录入的。
Java code

import java.io.*;
import javax.sound.sampled.AudioSystem;
import javax.sound.sampled.AudioInputStream;
import javax.sound.sampled.AudioFormat;
import javax.sound.sampled.SourceDataLine;
import javax.sound.sampled.DataLine;
import javax.sound.sampled.FloatControl;
import javax.sound.sampled.TargetDataLine;
public class RecordAndPlay {
    volatile int divider;
    public RecordAndPlay(){
        Play();
    }
    public static void main(String[] args) {
        new RecordAndPlay();
    }
    //播放音频文件
    public void Play() {

        try {
            AudioFormat audioFormat =
//                    new AudioFormat(AudioFormat.Encoding.PCM_SIGNED, 44100F,
//                    8, 1, 1, 44100F, false);
             new AudioFormat(AudioFormat.Encoding.PCM_SIGNED,44100F, 16, 2, 4,
             44100F, true);
            DataLine.Info info = new DataLine.Info(TargetDataLine.class,
                    audioFormat);
            TargetDataLine targetDataLine = (TargetDataLine) AudioSystem.getLine(info);
            targetDataLine.open(audioFormat);
            SourceDataLine sourceDataLine;
            info = new DataLine.Info(SourceDataLine.class, audioFormat);
            sourceDataLine = (SourceDataLine) AudioSystem.getLine(info);
            sourceDataLine.open(audioFormat);
            targetDataLine.start();
            sourceDataLine.start();
            FloatControl fc=(FloatControl)sourceDataLine.getControl(FloatControl.Type.MASTER_GAIN);
            double value=0.2;
            float dB = (float)(Math.log(value==0.0?0.0001:value)/Math.log(10.0)*20.0);
            fc.setValue(dB);
            int nByte = 0;
            final int bufSize=1024;
            byte[] buffer = new byte[bufSize];
            while (nByte != -1) {
                //System.in.read();
                nByte = targetDataLine.read(buffer, 0, bufSize);
                sourceDataLine.write(buffer, 0, nByte);
            }
            sourceDataLine.stop();

        } catch (Exception e) {
            e.printStackTrace();
        }
    }
}

------解决方案--------------------

那针对上次给你的那个录音程序，我写了一个录音并显示波形的程序。功能如下：
1.点击“开始”开始录音并显示，点击“暂停”即可暂停录音。
2.在暂停录音的状态下，可以移动滚动条查看之前的波形，按“回放”可以回放并显示波形，回放的开始是在当前显示的最左边的波形所对应的声音（不过这里遇到一个问题，即最后一点声音回放不出来，比较奇怪，没找到原因）。
程序如下：
Java code

import java.awt.*;
import java.awt.event.*;
import java.awt.geom.Line2D;
import javax.swing.*;
import javax.swing.event.*;
import java.util.*;
import javax.sound.sampled.AudioSystem;
import javax.sound.sampled.AudioInputStream;
import javax.sound.sampled.AudioFormat;
import javax.sound.sampled.SourceDataLine;
import javax.sound.sampled.DataLine;
import javax.sound.sampled.FloatControl;
import javax.sound.sampled.TargetDataLine;
/**
 * 2011-6-23 0:53:40
 * @author Administrator
 */
public class ShowWave {
    JFrame frame;
    JPanel pan;
    final int panHeight=400;
    JScrollBar timeLocationScrollBar;
    int point[];
    int number;
    byte bufferAll[];
    int bufferAllIndex;
    int vRate,hRate;
    JButton startButton,pauseButton;
    JButton replayButton,stopReplayButton;
    boolean continueRecorde;
    boolean continueReplay;
    JPanel centerPane,buttonPane;
    JSlider hSlider;
    boolean jsbActive;
    public ShowWave(){
        initData();
        frame=new JFrame("录音并显示波形");
        pan=new JPanel(){
            public void paint(Graphics g){
                g.setColor(Color.WHITE);
                g.fillRect(0, 0, this.getWidth(), this.getHeight());
                g.setColor(Color.red);
                int x[]=new int[number];
                for(int i=0;i<number;i++){
                    x[i]=i;
                    point[i]=panHeight-point[i];
                }
                g.drawPolyline(x, point, number);
//                Graphics2D g2d=(Graphics2D)g;
//                for(int i=0;i<number-1;i++){
//                    g2d.draw(new Line2D.Double(x[i], point[i], x[i+1], point[i+1]));
//                }
                g.setColor(Color.blue);
                
            }
        };
        pan.setPreferredSize(new Dimension(600,panHeight));
        timeLocationScrollBar=new JScrollBar();
        timeLocationScrollBar.setOrientation(JScrollBar.HORIZONTAL);
        timeLocationScrollBar.setMaximum(0);
        timeLocationScrollBar.setMinimum(0);
        timeLocationScrollBar.setValue(0);
        timeLocationScrollBar.addAdjustmentListener(new AdjustmentListener() {
            public void adjustmentValueChanged(AdjustmentEvent e) {
                if(jsbActive==false){
                    return;
                }
                synchronized(bufferAll){
                    int beginIndex=timeLocationScrollBar.getValue();
                    beginIndex=beginIndex*2*hRate;
                    if(beginIndex==0){
                        number=bufferAllIndex/hRate/2;
                        if(number>600){
                            number=600;
                        }
                    }
                    else{
                        number=600;
                    }
                    for(int i=0;i<number;i++,beginIndex+=2*hRate){
                        int hBit=bufferAll[beginIndex];
                        int lBit=bufferAll[beginIndex+1];
                        point[i]=hBit<<8|lBit;
                        point[i]/=vRate;
                        point[i]+=panHeight/2;
                    }
                    pan.repaint();
                }
            }
        });
        centerPane=new JPanel();
        centerPane.setLayout(new BorderLayout());
        centerPane.add(pan);
        centerPane.add(timeLocationScrollBar,BorderLayout.SOUTH);
        frame.getContentPane().add(centerPane);
        startButton=new JButton("开始");
        startButton.addActionListener(new ActionListener() {
            public void actionPerformed(ActionEvent e) {
                continueRecorde=true;
                jsbActive=false;
            }
        });
        pauseButton=new JButton("暂停");
        pauseButton.addActionListener(new ActionListener() {
            public void actionPerformed(ActionEvent e) {
                continueRecorde=false;
                jsbActive=true;
            }
        });
        hSlider=new JSlider();
        hSlider.setOrientation(JSlider.HORIZONTAL);
        hSlider.setMaximum(100);
        hSlider.setMinimum(1);
        hSlider.setValue(hRate);
        hSlider.addChangeListener(new ChangeListener() {
            public void stateChanged(ChangeEvent e) {
                hRate=hSlider.getValue();
                int length=bufferAllIndex/hRate/2;
                length-=600;
                int value=(int)((double)timeLocationScrollBar.getValue()/timeLocationScrollBar.getMaximum()*length);
                jsbActive=false;
                timeLocationScrollBar.setMaximum(length);
                jsbActive=true;
                timeLocationScrollBar.setValue(value);
            }
        });
        replayButton=new JButton("回放");
        replayButton.addActionListener(new ActionListener() {
            public void actionPerformed(ActionEvent e) {
                if(continueRecorde||continueReplay){
                    return;
                }
                new Thread(){
                    public void run(){
                        try{
                            continueReplay=true;
                            AudioFormat audioFormat =new AudioFormat(AudioFormat.Encoding.PCM_SIGNED,
                                    44100F, 16, 1, 2,44100F, true);
                            DataLine.Info info = new DataLine.Info(SourceDataLine.class, audioFormat);
                            SourceDataLine sourceDataLine;
                            sourceDataLine = (SourceDataLine) AudioSystem.getLine(info);
                            sourceDataLine.open(audioFormat);
                            sourceDataLine.start();
                            FloatControl fc=(FloatControl)sourceDataLine.getControl(FloatControl.Type.MASTER_GAIN);
                            double value=2;
                            float dB = (float)(Math.log(value==0.0?0.0001:value)/Math.log(10.0)*20.0);
                            fc.setValue(dB);
                            int beginIndex=timeLocationScrollBar.getValue();
                            beginIndex=beginIndex*2*hRate;
                            int bufSize=1024;
                            byte buffer[]=new byte[bufSize];            
                            while (beginIndex < bufferAllIndex && continueReplay) {
                                synchronized (bufferAll) {
                                    int nByte = bufferAllIndex - beginIndex > bufSize ? bufSize : bufferAllIndex - beginIndex;
                                    System.arraycopy(bufferAll, beginIndex, buffer, 0, nByte);
                                    sourceDataLine.write(buffer, 0, nByte);
//                                    System.out.println(beginIndex+"  "+bufferAllIndex);
                                    beginIndex += nByte;
                                    if(beginIndex/2/hRate<=timeLocationScrollBar.getMaximum()){
                                        timeLocationScrollBar.setValue(beginIndex/2/hRate);
                                    }
                                }
                            }
                            sourceDataLine.flush();
                            sourceDataLine.stop();
                            sourceDataLine.close();
                            continueReplay=false;
                        }catch(Exception ee){ee.printStackTrace();}
                    }
                }.start();
            }
        });
        stopReplayButton=new JButton("停止回放");
        stopReplayButton.addActionListener(new ActionListener(){
            public void actionPerformed(ActionEvent e) {
                continueReplay=false;
            }
        });
        Box box=Box.createHorizontalBox();
        box.add(Box.createHorizontalGlue());
        box.add(startButton);
        box.add(Box.createHorizontalStrut(10));
        box.add(pauseButton);
        box.add(Box.createHorizontalStrut(10));
        box.add(hSlider);
        box.add(Box.createHorizontalStrut(10));
        box.add(replayButton);
        box.add(Box.createHorizontalStrut(10));
        box.add(stopReplayButton);
        box.add(Box.createHorizontalGlue());
        box.setBorder(BorderFactory.createEmptyBorder(10, 10, 10, 10));
        frame.getContentPane().add(box,BorderLayout.SOUTH);
        frame.pack();
        frame.setLocationRelativeTo(null);
        frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        frame.setVisible(true);
        play();
    }

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