SpeechRecognitionAlternative

这是 实验性技术
检查 浏览器兼容性表格 在生产中使用这之前。

SpeechRecognitionAlternative interface of the Web 语音 API represents a single word that has been recognised by the speech recognition service.

特性

SpeechRecognitionAlternative.transcript 只读
Returns a string containing the transcript of the recognised word.
SpeechRecognitionAlternative.confidence 只读
Returns a numeric estimate of how confident the speech recognition system is that the recognition is correct.

范例

This code is excerpted from our Speech color changer 范例。

recognition.onresult = function(event) {
  // The SpeechRecognitionEvent results property returns a SpeechRecognitionResultList object
  // The SpeechRecognitionResultList object contains SpeechRecognitionResult objects.
  // It has a getter so it can be accessed like an array
  // The first [0] returns the SpeechRecognitionResult at position 0.
  // Each SpeechRecognitionResult object contains SpeechRecognitionAlternative objects that contain individual results.
  // These also have getters so they can be accessed like arrays.
  // The second [0] returns the SpeechRecognitionAlternative at position 0.
  // We then return the transcript property of the SpeechRecognitionAlternative object
  var color = event.results[0][0].transcript;
  diagnostic.textContent = 'Result received: ' + color + '.';
  bg.style.backgroundColor = color;
}
					

规范

规范 状态 Comment
Web 语音 API
The definition of 'SpeechRecognitionAlternative' in that specification.
草案

浏览器兼容性

更新 GitHub 上的兼容性数据
Desktop Mobile
Chrome Edge Firefox Internet Explorer Opera Safari Android webview Chrome for Android Firefox for Android Opera for Android Safari on iOS Samsung Internet
SpeechRecognitionAlternative
Chrome 33
Prefixed 注意事项
33
Prefixed 注意事项
Prefixed Implemented with the vendor prefix: webkit
You'll need to serve your code through a web server for recognition to work.
Edge ≤79
Prefixed 注意事项
≤79
Prefixed 注意事项
Prefixed Implemented with the vendor prefix: webkit
You'll need to serve your code through a web server for recognition to work.
Firefox 不支持 No IE 不支持 No Opera 不支持 No Safari 不支持 No WebView Android Yes
Prefixed 注意事项
Yes
Prefixed 注意事项
Prefixed Implemented with the vendor prefix: webkit
You'll need to serve your code through a web server for recognition to work.
Chrome Android Yes
Prefixed 注意事项
Yes
Prefixed 注意事项
Prefixed Implemented with the vendor prefix: webkit
You'll need to serve your code through a web server for recognition to work.
Firefox Android 不支持 No Opera Android 不支持 No Safari iOS 不支持 No Samsung Internet Android Yes
Prefixed 注意事项
Yes
Prefixed 注意事项
Prefixed Implemented with the vendor prefix: webkit
You'll need to serve your code through a web server for recognition to work.
confidence
Chrome 33
Prefixed 注意事项
33
Prefixed 注意事项
Prefixed Implemented with the vendor prefix: webkit
You'll need to serve your code through a web server for recognition to work.
Edge ≤79
Prefixed 注意事项
≤79
Prefixed 注意事项
Prefixed Implemented with the vendor prefix: webkit
You'll need to serve your code through a web server for recognition to work.
Firefox 不支持 No IE 不支持 No Opera 不支持 No Safari 不支持 No WebView Android Yes
Prefixed 注意事项
Yes
Prefixed 注意事项
Prefixed Implemented with the vendor prefix: webkit
You'll need to serve your code through a web server for recognition to work.
Chrome Android Yes
Prefixed 注意事项
Yes
Prefixed 注意事项
Prefixed Implemented with the vendor prefix: webkit
You'll need to serve your code through a web server for recognition to work.
Firefox Android 不支持 No Opera Android 不支持 No Safari iOS 不支持 No Samsung Internet Android Yes
Prefixed 注意事项
Yes
Prefixed 注意事项
Prefixed Implemented with the vendor prefix: webkit
You'll need to serve your code through a web server for recognition to work.
transcript
Chrome 33
Prefixed 注意事项
33
Prefixed 注意事项
Prefixed Implemented with the vendor prefix: webkit
You'll need to serve your code through a web server for recognition to work.
Edge ≤79
Prefixed 注意事项
≤79
Prefixed 注意事项
Prefixed Implemented with the vendor prefix: webkit
You'll need to serve your code through a web server for recognition to work.
Firefox 不支持 No IE 不支持 No Opera 不支持 No Safari 不支持 No WebView Android Yes
Prefixed 注意事项
Yes
Prefixed 注意事项
Prefixed Implemented with the vendor prefix: webkit
You'll need to serve your code through a web server for recognition to work.
Chrome Android Yes
Prefixed 注意事项
Yes
Prefixed 注意事项
Prefixed Implemented with the vendor prefix: webkit
You'll need to serve your code through a web server for recognition to work.
Firefox Android 不支持 No Opera Android 不支持 No Safari iOS 不支持 No Samsung Internet Android Yes
Prefixed 注意事项
Yes
Prefixed 注意事项
Prefixed Implemented with the vendor prefix: webkit
You'll need to serve your code through a web server for recognition to work.

图例

完整支持
完整支持
不支持
不支持
实验。期望将来行为有所改变。
实验。期望将来行为有所改变。
见实现注意事项。
要求使用供应商前缀或不同名称。
要求使用供应商前缀或不同名称。

Firefox OS permissions

To use speech recognition in an app, you need to specify the following permissions in your manifest :

"permissions": {
  "audio-capture" : {
    "description" : "Audio capture"
  },
  "speech-recognition" : {
    "description" : "Speech recognition"
  }
}
					

You also need a privileged app, so you need to include this as well:

  "type": "privileged"
					

另请参阅