Web Speech API - 语音文本转换的Web解决方案

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参考

  • W3C , https://dvcs.w3.org/hg/speech-api/raw-file/tip/speechapi.html

  • 41ZONE , http://blog.41zone.cc/20140215/168/

  • Demo , http://blog.41zone.cc/test/webspeech/index.html

分类

  • 语音转换为文本提供可能,Speech Recognition

  • 文本输出为语音提供可能,Speech Synthesis

基本说明

  • 目前Chrome新版本浏览器支持该方案;

  • 经过测试FF、Opera、IE、Safari没有对此进行支持;

  • 该协议由Speech API Community Group维护;

  • 当前规范不属于正式规范,但是以后以此作为参考方案;

要点说明

  • 对于将语音与文本相互转换的技术是需要通过网络数据来实现的,也就是说,该API必须在网络条件下才能运行

Speech Recognition

Demo可以参考:41ZONE测试代码


var SpeechRecognition = window.SpeechRecognition ||
            window.mozSpeechRecognition ||
            window.webkitSpeechRecognition ||
            window.msSpeechRecognition ||
            window.oSpeechRecognition;
if(!SpeechRecognition) return ;
var speechRecognition = new SpeechRecognition();
speechRecognition.addEventListener("result",function(event) {
    var results = event.results;
    if(results.length > 0) {
        for(var i = 0;i<results.length;i++) {
            console.log(results[i][0].transcript);
        }
    }
},false);
speechRecognition.continuous = true; speechRecognition.start();

Speech Synthesis

注意:当前没有浏览器对此接口方案支持

var ssu = new SpeechSynthesisUtterance();
ssu.text = 'Hello World';
ssu.lang = 'en-US';
ssu.rate = 1.2;
ssu.addEventListener("end",function(event) { console.log("finished"); },false);
var su = new SpeechSynthesis();
su.speak(ssu);

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