Unity 聲音處理 之 語音識別

音量檢測

檢測當前麥克風的輸入音量

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

public class NewBehaviourScript2 : MonoBehaviour
{
     private static int VOLUME_DATA_LENGTH = 128;    //錄制的聲音長度

    public float volume;        //音量

    public Text text;

    public Slider slider;

    private AudioClip mMicrophoneRecode;  //錄制的音頻
    private string mDeviceName;           //設備名稱

    public int xishu=1000;
    private const int frequency = 44100; //碼率
    private const int lengthSec = 999;   //錄制時長

    // Use this for initialization
    void Start () {
        //獲取設備名稱
        mDeviceName = Microphone.devices[0];
        
      
        //錄制一段音頻
        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>
    /// 獲取最大的音量
    /// </summary>
    /// 
    /// <returns>
    /// 音量大小
    /// </returns>
    private float GetMaxVolume()
    {
        float maxVolume = 0f;

        //用於儲存一段時間內的音頻信息
        float[] volumeData = new float[VOLUME_DATA_LENGTH];

        int offset;
        //獲取錄制的音頻的開頭位置
        offset = Microphone.GetPosition(mDeviceName) - VOLUME_DATA_LENGTH + 1;

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

        //獲取數據
        mMicrophoneRecode.GetData(volumeData, offset);

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

        return maxVolume;
    }
}

 

關鍵字識別

此處利用win10自帶的識別

記得引入

using System.Collections;
using System.Collections.Generic;
using UnityEngine;
using UnityEngine.Windows.Speech;//引入命名空間  利用
using SpeechLib;
public class NewBehaviourScript1 : MonoBehaviour
{
    // 短語識別器
    private PhraseRecognizer m_PhraseRecognizer;
    // 關鍵字

    public string[] keywords;

    public GameObject xiangdu;
   
    // 可信度
    public ConfidenceLevel m_confidenceLevel = ConfidenceLevel.Medium;
    // Use this for initialization
    void Start ()
    {
    
        //創建一個識別器
        m_PhraseRecognizer = new KeywordRecognizer (keywords, m_confidenceLevel);
        //通過注冊監聽的方法
        m_PhraseRecognizer.OnPhraseRecognized += M_PhraseRecognizer_OnPhraseRecognized;
        //開啟識別器
        m_PhraseRecognizer.Start ();
    }

    // 當識別到關鍵字時，會調用這個方法

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

        if (args.text.Equals("幫我倒杯水"))
        {
            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，開始播放七里香");
            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，我沒聽懂");
            gameObject.SetActive(false);
            xiangdu.SetActive(true);
            xiangdu.GetComponent<AudioSource>().Play();
        }
    }
    private void OnDestroy ()
    {
        //用完應該釋放，否則會帶來額外的開銷
        m_PhraseRecognizer.Dispose ();
    }
    // Update is called once per frame
    void Update ()
    {

    }

    

}