HTML5录音并调用百度语音识别

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HTML5录音借鉴的网上的代码,但是下载下来却无法用,查阅了好多资料,终于在国外某网站上找到原因,原来是js函数废弃了,替换为新的js函数名即可。

HTML5录音的代码:http://www.it165.net/design/html/201406/2651.html

需修改的部分:

原代码:

var HZRecorder = function (stream, config) {        config = config || {};        config.sampleBits = config.sampleBits || 8;      //采样数位 8, 16        config.sampleRate = config.sampleRate || (44100 / 6);   //采样率(1/6 44100)         var context = new webkitAudioContext();        var audioInput = context.createMediaStreamSource(stream);        var recorder = context.createJavaScriptNode(4096, 1, 1);

修改后代码:

var HZRecorder = function (stream, config) {        config = config || {};        config.sampleBits = config.sampleBits || 16;      //采样数位 8, 16        config.sampleRate = config.sampleRate || (16000);   //采样率(1/6 44100)         var context = new AudioContext();        var audioInput = context.createMediaStreamSource(stream);        var recorder = context.createScriptProcessor(4096, 1, 1);

中间有几个地方是修改过的。采样位数改为16是为了后续调用百度语音识别的接口。

百度语音识别接口:http://yuyin.baidu.com/docs/asr/57

下载上面的源码,就可以生成相应的wav,以下是C#调用生成的wav语音文件的测试案例

using System;using System.Collections.Generic;using System.Linq;using System.Web;using System.Web.UI;using System.Web.UI.WebControls;using WeiPay;using System.Web.Security;using System.Web.Script.Serialization;using System.IO;using System.Text;using System.Runtime.Serialization.Json;using System.Net; namespace WebApplication1{    public partial class test : System.Web.UI.Page    {        string API_Key = "xxxxxx";        string Secret_Key = "xxxxxx";        protected void Page_Load(object sender, EventArgs e)        {            if (!IsPostBack)            {                TextBox1.Text = GetAccessToken();            }        }         protected void Button1_Click(object sender, EventArgs e)        {                        string uid = DateTime.Now.ToString("yyyyMMddHHmmss");            string returnStr = getStrText(uid, TextBox1.Text, "en", "D:\\1.wav", "wav", "16000");            TextBox2.Text += returnStr + "\n";        }          public string getStrText(string para_API_id, string para_API_access_token,string para_API_language, string para_API_record,string para_format,string para_Hz)        {            //方法参数说明:            //该方法返回值:            //该方法执行正确返回值是语音翻译的文本,错误是错误号,可以去看百度语音文档,查看对应错误                         string strText = null;            string error = null;            FileInfo fi = new FileInfo(para_API_record);            FileStream fs = new FileStream(para_API_record, FileMode.Open);            byte[] voice = new byte[fs.Length];            fs.Read(voice, 0, voice.Length);            fs.Close();             string getTextUrl = "http://vop.baidu.com/server_api?lan=" + para_API_language + "&cuid=" + para_API_id + "&token=" + para_API_access_token;            HttpWebRequest getTextRequst = WebRequest.Create(getTextUrl) as HttpWebRequest;            /* getTextRequst.Proxy = null;            getTextRequst.ServicePoint.Expect100Continue = false;            getTextRequst.ServicePoint.UseNagleAlgorithm = false;            getTextRequst.ServicePoint.ConnectionLimit = 65500;            getTextRequst.AllowWriteStreamBuffering = false;*/             getTextRequst.ContentType = "audio /"+para_format+";rate="+para_Hz;            getTextRequst.ContentLength = fi.Length;            getTextRequst.Method = "post";            getTextRequst.Accept = "*/*";            getTextRequst.KeepAlive = true;            //serverreq.UserAgent = "Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.1; SV1; .NET CLR 2.0.50727)";            getTextRequst.Timeout = 30000;//30秒连接不成功就中断             using (Stream writeStream = getTextRequst.GetRequestStream())            {                writeStream.Write(voice, 0, voice.Length);            }            string strJSON = "";            HttpWebResponse getTextResponse = getTextRequst.GetResponse() as HttpWebResponse;                   using (StreamReader strHttpText = new StreamReader(getTextResponse.GetResponseStream(), Encoding.UTF8))            {                strJSON = strHttpText.ReadToEnd();            }            return strJSON;                     }           private string GetAccessToken()        {            string url = string.Format("https://openapi.baidu.com/oauth/2.0/token?grant_type=client_credentials&client_id={0}&client_secret={1}", API_Key, Secret_Key);            string returnStr = HttpUtil.Send("", url);             Access_Token at = System.Common.JSONConvert.JsonDeserializeBySingleData<Access_Token>(returnStr);            if (at != null)            {                return at.access_token;            }            else            {                return null;            }        }                   public class Access_Token        {            public string access_token { get; set; }            public string expires_in { get; set; }            public string refresh_token { get; set; }            public string scope { get; set; }            public string session_key { get; set; }            public string session_secret { get; set; }        }             }}

实际案例应用

另附相似度对比算法及测试程序下载:

/// <summary>        /// 判断两个字符串的相似度//公式:l = q/(q+r+s);        /// </summary>        /// <param name="sourcestring"></param>        /// <param name="str"></param>        /// <returns></returns>        public static string Similarity(string a, string b)        {            string a1 = "";            string b1 = "";            //消除重复            for (int i = 0; i < a.Length; i++)            {                string emtpy = a.Substring(i, 1).ToString();                if (a1.Length == 0)                {                    a1 = emtpy;                }                if (a1.IndexOf(emtpy, 0) < 0)                {                    a1 += emtpy;                }            }            //消除重复            for (int i = 0; i < b.Length; i++)            {                string emtpy = b.Substring(i, 1).ToString();                if (b1.Length == 0)                {                    b1 = emtpy;                }                if (b1.IndexOf(emtpy, 0) < 0)                {                    b1 += emtpy;                }            }            //计算相似度            if (a1.Length >= b1.Length)            {                int q = 0;                for (int i = 0; i < b1.Length; i++)                {                    for (int j = 0; j < a1.Length; j++)                    {                        if (b1.Substring(i, 1).ToString() == a1.Substring(j, 1).ToString())                        {                            q += 1;                        }                    }                }                System.Globalization.NumberFormatInfo provider = new System.Globalization.NumberFormatInfo();                provider.PercentDecimalDigits = 2;//小数点保留几位数.                provider.PercentPositivePattern = 1;//百分号出现在何处.                double result = (double)q / (a1.Length + b1.Length - q);//一定要用double类型.                return result.ToString("P", provider);            }            else            {                int q = 0;                for (int i = 0; i < a1.Length; i++)                {                    for (int j = 0; j < b1.Length; j++)                    {                        if (a1.Substring(i, 1).ToString() == b1.Substring(j, 1).ToString())                        {                            q += 1;                        }                    }                }                System.Globalization.NumberFormatInfo provider = new System.Globalization.NumberFormatInfo();                provider.PercentDecimalDigits = 2;//小数点保留几位数.                provider.PercentPositivePattern = 1;//百分号出现在何处.                double result = (double)q / (a1.Length + b1.Length - q);//一定要用double类型.                return result.ToString("P", provider);             }          }

案例程序下载:http://download.csdn.net/detail/tcld2269/8745137

点这里可以跳转到人工智能网站

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