在此页

• 特性
• 范例
• 规范
• 浏览器兼容性
• 另请参阅
• 相关话题

这是 实验性技术
检查 浏览器兼容性表格 要小心谨慎在生产中使用这之前。

SpeechRecognitionAlternative 接口在 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	注释
Web 语音 API The definition of 'SpeechRecognitionAlternative' in that specification.	草案

浏览器兼容性

The compatibility table on this page is generated from structured data. If you'd like to contribute to the data, please check out https://github.com/mdn/browser-compat-data and send us a pull request. 更新 GitHub 上的兼容性数据

	桌面						移动
	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

• Web 语音 API

元数据

• 最后修改： 2019 年 3 月 23 日

相关话题

1. SpeechRecognitionAlternative
2. 特性

   1. confidence
   2. transcript
3. Related pages for Web Speech API

   1. SpeechGrammar
   2. SpeechGrammarList
   3. SpeechRecognition
   4. SpeechRecognitionError
   5. SpeechRecognitionEvent
   6. SpeechRecognitionResult
   7. SpeechRecognitionResultList
   8. SpeechSynthesis
   9. SpeechSynthesisErrorEvent
   10. SpeechSynthesisEvent
   11. SpeechSynthesisUtterance
   12. SpeechSynthesisVoice