この翻訳は不完全です。英語から この記事を翻訳 してください。
これは実験段階の機能です。
この機能は複数のブラウザーで開発中の状態にあります。互換性テーブルをチェックしてください。また、実験段階の機能の構文と挙動は、仕様変更に伴い各ブラウザーの将来のバージョンで変更になる可能性があることに注意してください。
SpeechRecognitionAlternativeは、Web Speech APIのインターフェースです。speech recognition serviceにより認識された単一の言葉を表します
プロパティ
SpeechRecognitionAlternative.transcript読取専用- Returns a string containing the transcript of the recognised word.
SpeechRecognitionAlternative.confidence読取専用- Returns a numeric estimate of how confident the speech recognition system is that the recognition is correct.
Examples
This code is excerpted from our Speech color changer example.
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;
}
策定状況
| Specification | Status | Comment |
|---|---|---|
| Web Speech API SpeechRecognitionAlternative の定義 |
ドラフト |
ブラウザ対応状況
We're converting our compatibility data into a machine-readable JSON format. This compatibility table still uses the old format, because we haven't yet converted the data it contains. Find out how you can help!
| Feature | Chrome | Firefox (Gecko) | Internet Explorer | Opera | Safari (WebKit) |
|---|---|---|---|---|---|
| Basic support | 33 [1] | 44 (44) [2] | 未サポート | 未サポート | 未サポート |
| Feature | Android | Chrome | Firefox Mobile (Gecko) | Firefox OS | IE Phone | Opera Mobile | Safari Mobile |
|---|---|---|---|---|---|---|---|
| Basic support | ? | (有)[1] | ? | 2.5 | 未サポート | 未サポート | 未サポート |
- [1] Speech recognition interfaces are currently prefixed on Chrome, so you'll need to prefix interface names appropriately, e.g.
webkitSpeechRecognition; You'll also need to serve your code through a web server for recognition to work. - [2] Can be enabled via the
media.webspeech.recognition.enableflag in about:config, although note that currently speech recognition won't work on Desktop Firefox — it will be properly exposed soon, once the required internal permissions are sorted out.
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"