Unity 声音处理 之 语音识别

音量检测

检测当前麦克风的输入音量

using System.Collections;
using System.Collections.Generic;
using UnityEngine;
using UnityEngine.UI;

public class NewBehaviourScript2 : MonoBehaviour
{
     private static int VOLUME_DATA_LENGTH = 128;    //录制的声音长度

    public float volume;        //音量

    public Text text;

    public Slider slider;

    private AudioClip mMicrophoneRecode;  //录制的音频
    private string mDeviceName;           //设备名称

    public int xishu=1000;
    private const int frequency = 44100; //码率
    private const int lengthSec = 999;   //录制时长

    // Use this for initialization
    void Start () {
        //获取设备名称
        mDeviceName = Microphone.devices[0];
        
      
        //录制一段音频
        mMicrophoneRecode = Microphone.Start(mDeviceName, true, lengthSec, frequency);
    }
    
    // Update is called once per frame
    void Update () {
        volume = GetMaxVolume();
        volume*=xishu;
        slider.value=Mathf.Lerp(slider.value,volume/200,0.1f);
        text.text=volume.ToString();
    }

    /// <summary>
    /// 获取最大的音量
    /// </summary>
    /// 
    /// <returns>
    /// 音量大小
    /// </returns>
    private float GetMaxVolume()
    {
        float maxVolume = 0f;

        //用于储存一段时间内的音频信息
        float[] volumeData = new float[VOLUME_DATA_LENGTH];

        int offset;
        //获取录制的音频的开头位置
        offset = Microphone.GetPosition(mDeviceName) - VOLUME_DATA_LENGTH + 1;

        if(offset < 0)
        {
            return 0f;
        }

        //获取数据
        mMicrophoneRecode.GetData(volumeData, offset);

        //解析数据
        for(int i = 0;i < VOLUME_DATA_LENGTH; i++)
        {
            float tempVolume = volumeData[i];
            if(tempVolume > maxVolume)
            {
                maxVolume = tempVolume;
            }
        }

        return maxVolume;
    }
}

关键字识别

此处利用win10自带的识别

记得引入

using System.Collections;
using System.Collections.Generic;
using UnityEngine;
using UnityEngine.Windows.Speech;//引入命名空间  利用
using SpeechLib;
public class NewBehaviourScript1 : MonoBehaviour
{
    // 短语识别器
    private PhraseRecognizer m_PhraseRecognizer;
    // 关键字

    public string[] keywords;

    public GameObject xiangdu;
   
    // 可信度
    public ConfidenceLevel m_confidenceLevel = ConfidenceLevel.Medium;
    // Use this for initialization
    void Start ()
    {
    
        //创建一个识别器
        m_PhraseRecognizer = new KeywordRecognizer (keywords, m_confidenceLevel);
        //通过注册监听的方法
        m_PhraseRecognizer.OnPhraseRecognized += M_PhraseRecognizer_OnPhraseRecognized;
        //开启识别器
        m_PhraseRecognizer.Start ();
    }

    // 当识别到关键字时，会调用这个方法

    private void M_PhraseRecognizer_OnPhraseRecognized (PhraseRecognizedEventArgs args)
    {
        print (args.text);
        if (args.text.Equals("小爱"))
        {
            SpVoice v = new SpVoice();
            v.Voice = v.GetVoices(string.Empty, string.Empty).Item(0);
            v.Speak("我在");
        }

        if (args.text.Equals("帮我倒杯水"))
        {
            SpVoice v = new SpVoice();
            v.Voice = v.GetVoices(string.Empty, string.Empty).Item(0);
            v.Speak("是的主人");
        }

        if (args.text.Equals("播放七里香"))
        {
            SpVoice v = new SpVoice();
            v.Voice = v.GetVoices(string.Empty, string.Empty).Item(0);
            v.Speak("好的，主人，开始播放七里香");
            gameObject.SetActive(false);
            xiangdu.SetActive(true);
            xiangdu.GetComponent<AudioSource>().Play();
        }

        if (args.text.Equals("哈哈"))
        {
            SpVoice v = new SpVoice();
            v.Voice = v.GetVoices(string.Empty, string.Empty).Item(0);
            v.Speak("主人，我没听懂");
            gameObject.SetActive(false);
            xiangdu.SetActive(true);
            xiangdu.GetComponent<AudioSource>().Play();
        }
    }
    private void OnDestroy ()
    {
        //用完应该释放，否则会带来额外的开销
        m_PhraseRecognizer.Dispose ();
    }
    // Update is called once per frame
    void Update ()
    {

    }

    

}